spi \
tablefunc \
tcn \
+ test_decoding \
test_parser \
test_shm_mq \
tsearch2 \
--- /dev/null
+# Generated subdirectories
+/log/
+/results/
+/tmp_check/
--- /dev/null
+# contrib/test_decoding/Makefile
+
+MODULES = test_decoding
+OBJS = test_decoding.o
+
+# Note: because we don't tell the Makefile there are any regression tests,
+# we have to clean those result files explicitly
+EXTRA_CLEAN = -r $(pg_regress_clean_files)
+
+ifdef USE_PGXS
+PG_CONFIG = pg_config
+PGXS := $(shell $(PG_CONFIG) --pgxs)
+include $(PGXS)
+else
+subdir = contrib/test_decoding
+top_builddir = ../..
+include $(top_builddir)/src/Makefile.global
+include $(top_srcdir)/contrib/contrib-global.mk
+endif
+
+# Disabled because these tests require "wal_level=logical", which
+# typical installcheck users do not have (e.g. buildfarm clients).
+installcheck:;
+
+# But it can nonetheless be very helpful to run tests on preexisting
+# installation, allow to do so, but only if requested explicitly.
+installcheck-force: regresscheck-install-force isolationcheck-install-force
+
+check: regresscheck isolationcheck
+
+submake-regress:
+ $(MAKE) -C $(top_builddir)/src/test/regress all
+
+submake-isolation:
+ $(MAKE) -C $(top_builddir)/src/test/isolation all
+
+submake-test_decoding:
+ $(MAKE) -C $(top_builddir)/contrib/test_decoding
+
+REGRESSCHECKS=ddl rewrite toast permissions decoding_in_xact binary
+
+regresscheck: all | submake-regress submake-test_decoding
+ $(pg_regress_check) \
+ --temp-config $(top_srcdir)/contrib/test_decoding/logical.conf \
+ --temp-install=./tmp_check \
+ --extra-install=contrib/test_decoding \
+ $(REGRESSCHECKS)
+
+regresscheck-install-force: | submake-regress submake-test_decoding
+ $(pg_regress_installcheck) \
+ --extra-install=contrib/test_decoding \
+ $(REGRESSCHECKS)
+
+ISOLATIONCHECKS=mxact delayed_startup concurrent_ddl_dml
+
+isolationcheck: all | submake-isolation submake-test_decoding
+ $(pg_isolation_regress_check) \
+ --temp-config $(top_srcdir)/contrib/test_decoding/logical.conf \
+ --extra-install=contrib/test_decoding \
+ $(ISOLATIONCHECKS)
+
+isolationcheck-install-force: all | submake-isolation submake-test_decoding
+ $(pg_isolation_regress_installcheck) \
+ --extra-install=contrib/test_decoding \
+ $(ISOLATIONCHECKS)
+
+PHONY: submake-test_decoding submake-regress check \
+ regresscheck regresscheck-install-force \
+ isolationcheck isolationcheck-install-force
--- /dev/null
+-- predictability
+SET synchronous_commit = on;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ ?column?
+----------
+ init
+(1 row)
+
+-- succeeds, textual plugin, textual consumer
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'force-binary', '0');
+ data
+------
+(0 rows)
+
+-- fails, binary plugin, textual consumer
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'force-binary', '1');
+ERROR: output plugin cannot produce text output
+-- succeeds, textual plugin, binary consumer
+SELECT data FROM pg_logical_slot_get_binary_changes('regression_slot', NULL, NULL, 'force-binary', '0');
+ data
+------
+(0 rows)
+
+-- succeeds, binary plugin, binary consumer
+SELECT data FROM pg_logical_slot_get_binary_changes('regression_slot', NULL, NULL, 'force-binary', '1');
+ data
+------
+(0 rows)
+
+SELECT 'init' FROM pg_drop_replication_slot('regression_slot');
+ ?column?
+----------
+ init
+(1 row)
+
--- /dev/null
+Parsed test spec with 2 sessions
+
+starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_float s1_insert_tbl2 s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl2_float: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE float;
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s1_commit: COMMIT;
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[double precision]:1
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl1_float s1_insert_tbl2 s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl1_float: ALTER TABLE tbl1 ALTER COLUMN val2 TYPE float;
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s1_commit: COMMIT;
+step s2_alter_tbl1_float: <... completed>
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
+COMMIT
+BEGIN
+table public.pg_temp: INSERT: val1[integer]:1 val2[double precision]:1
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_char s1_insert_tbl2 s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl2_char: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE character varying;
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s1_commit: COMMIT;
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[character varying]:'1'
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl1_char s1_insert_tbl2 s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl1_char: ALTER TABLE tbl1 ALTER COLUMN val2 TYPE character varying;
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s1_commit: COMMIT;
+step s2_alter_tbl1_char: <... completed>
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
+COMMIT
+BEGIN
+table public.pg_temp: INSERT: val1[integer]:1 val2[character varying]:'1'
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s1_begin s1_insert_tbl1 s1_insert_tbl2 s2_alter_tbl1_float s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl1_float: ALTER TABLE tbl1 ALTER COLUMN val2 TYPE float;
+step s1_commit: COMMIT;
+step s2_alter_tbl1_float: <... completed>
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
+COMMIT
+BEGIN
+table public.pg_temp: INSERT: val1[integer]:1 val2[double precision]:1
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s1_begin s1_insert_tbl1 s1_insert_tbl2 s2_alter_tbl1_char s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl1_char: ALTER TABLE tbl1 ALTER COLUMN val2 TYPE character varying;
+step s1_commit: COMMIT;
+step s2_alter_tbl1_char: <... completed>
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
+COMMIT
+BEGIN
+table public.pg_temp: INSERT: val1[integer]:1 val2[character varying]:'1'
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_float s1_insert_tbl2 s2_alter_tbl1_float s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl2_float: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE float;
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl1_float: ALTER TABLE tbl1 ALTER COLUMN val2 TYPE float;
+step s1_commit: COMMIT;
+step s2_alter_tbl1_float: <... completed>
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[double precision]:1
+COMMIT
+BEGIN
+table public.pg_temp: INSERT: val1[integer]:1 val2[double precision]:1
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_char s1_insert_tbl2 s2_alter_tbl1_char s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl2_char: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE character varying;
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl1_char: ALTER TABLE tbl1 ALTER COLUMN val2 TYPE character varying;
+step s1_commit: COMMIT;
+step s2_alter_tbl1_char: <... completed>
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[character varying]:'1'
+COMMIT
+BEGIN
+table public.pg_temp: INSERT: val1[integer]:1 val2[character varying]:'1'
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s2_alter_tbl2_char s1_begin s1_insert_tbl1 s2_alter_tbl2_text s1_insert_tbl2 s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s2_alter_tbl2_char: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE character varying;
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl2_text: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE text;
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s1_commit: COMMIT;
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+COMMIT
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[text]:'1'
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s2_alter_tbl2_char s1_begin s1_insert_tbl1 s2_alter_tbl2_text s1_insert_tbl2 s2_alter_tbl1_char s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s2_alter_tbl2_char: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE character varying;
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl2_text: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE text;
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl1_char: ALTER TABLE tbl1 ALTER COLUMN val2 TYPE character varying;
+step s1_commit: COMMIT;
+step s2_alter_tbl1_char: <... completed>
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+COMMIT
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[text]:'1'
+COMMIT
+BEGIN
+table public.pg_temp: INSERT: val1[integer]:1 val2[character varying]:'1'
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_boolean s1_insert_tbl2 s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl2_boolean: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE boolean;
+ERROR: column "val2" cannot be cast automatically to type boolean
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s1_commit: COMMIT;
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_boolean s1_insert_tbl2 s2_alter_tbl1_boolean s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl2_boolean: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE boolean;
+ERROR: column "val2" cannot be cast automatically to type boolean
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl1_boolean: ALTER TABLE tbl1 ALTER COLUMN val2 TYPE boolean;
+step s1_commit: COMMIT;
+step s2_alter_tbl1_boolean: <... completed>
+error in steps s1_commit s2_alter_tbl1_boolean: ERROR: column "val2" cannot be cast automatically to type boolean
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_add_int s1_insert_tbl2_3col s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl2_add_int: ALTER TABLE tbl2 ADD COLUMN val3 INTEGER;
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s1_commit: COMMIT;
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:1
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s1_begin s1_insert_tbl1 s1_insert_tbl2 s1_commit s1_begin s2_alter_tbl2_add_int s1_insert_tbl2_3col s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s1_commit: COMMIT;
+step s1_begin: BEGIN;
+step s2_alter_tbl2_add_int: ALTER TABLE tbl2 ADD COLUMN val3 INTEGER;
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s1_commit: COMMIT;
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
+COMMIT
+BEGIN
+COMMIT
+BEGIN
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:1
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_add_float s1_insert_tbl2_3col s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl2_add_float: ALTER TABLE tbl2 ADD COLUMN val3 FLOAT;
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s1_commit: COMMIT;
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[double precision]:1
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s1_begin s1_insert_tbl1 s1_insert_tbl2 s1_commit s1_begin s2_alter_tbl2_add_float s1_insert_tbl2_3col s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s1_commit: COMMIT;
+step s1_begin: BEGIN;
+step s2_alter_tbl2_add_float: ALTER TABLE tbl2 ADD COLUMN val3 FLOAT;
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s1_commit: COMMIT;
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
+COMMIT
+BEGIN
+COMMIT
+BEGIN
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[double precision]:1
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_add_char s1_insert_tbl2_3col s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl2_add_char: ALTER TABLE tbl2 ADD COLUMN val3 character varying;
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s1_commit: COMMIT;
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[character varying]:'1'
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s1_begin s1_insert_tbl1 s1_insert_tbl2 s1_commit s1_begin s2_alter_tbl2_add_char s1_insert_tbl2_3col s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s1_commit: COMMIT;
+step s1_begin: BEGIN;
+step s2_alter_tbl2_add_char: ALTER TABLE tbl2 ADD COLUMN val3 character varying;
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s1_commit: COMMIT;
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
+COMMIT
+BEGIN
+COMMIT
+BEGIN
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[character varying]:'1'
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s2_alter_tbl2_add_int s1_begin s1_insert_tbl2_3col s2_alter_tbl2_drop_3rd_col s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s2_alter_tbl2_add_int: ALTER TABLE tbl2 ADD COLUMN val3 INTEGER;
+step s1_begin: BEGIN;
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s2_alter_tbl2_drop_3rd_col: ALTER TABLE tbl2 DROP COLUMN val3;
+step s1_commit: COMMIT;
+step s2_alter_tbl2_drop_3rd_col: <... completed>
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:1
+COMMIT
+BEGIN
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s2_alter_tbl2_add_int s1_begin s1_insert_tbl2_3col s2_alter_tbl2_drop_3rd_col s1_insert_tbl2 s1_commit s1_insert_tbl2 s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s2_alter_tbl2_add_int: ALTER TABLE tbl2 ADD COLUMN val3 INTEGER;
+step s1_begin: BEGIN;
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s2_alter_tbl2_drop_3rd_col: ALTER TABLE tbl2 DROP COLUMN val3;
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s1_commit: COMMIT;
+step s2_alter_tbl2_drop_3rd_col: <... completed>
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:null
+COMMIT
+BEGIN
+COMMIT
+BEGIN
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s2_alter_tbl2_add_int s1_begin s1_insert_tbl2_3col s2_alter_tbl2_drop_3rd_col s1_commit s2_get_changes s2_alter_tbl2_add_text s1_begin s1_insert_tbl2_3col s2_alter_tbl2_3rd_char s1_insert_tbl2_3col s1_commit s2_get_changes s2_alter_tbl2_3rd_int s1_insert_tbl2_3col s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s2_alter_tbl2_add_int: ALTER TABLE tbl2 ADD COLUMN val3 INTEGER;
+step s1_begin: BEGIN;
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s2_alter_tbl2_drop_3rd_col: ALTER TABLE tbl2 DROP COLUMN val3;
+step s1_commit: COMMIT;
+step s2_alter_tbl2_drop_3rd_col: <... completed>
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:1
+COMMIT
+BEGIN
+COMMIT
+step s2_alter_tbl2_add_text: ALTER TABLE tbl2 ADD COLUMN val3 TEXT;
+step s1_begin: BEGIN;
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s2_alter_tbl2_3rd_char: ALTER TABLE tbl2 ALTER COLUMN val3 TYPE character varying;
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s1_commit: COMMIT;
+step s2_alter_tbl2_3rd_char: <... completed>
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[text]:'1'
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[text]:'1'
+COMMIT
+BEGIN
+COMMIT
+step s2_alter_tbl2_3rd_int: ALTER TABLE tbl2 ALTER COLUMN val3 TYPE int USING val3::integer;
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+table public.pg_temp: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:null
+table public.pg_temp: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:1
+table public.pg_temp: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:1
+COMMIT
+BEGIN
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:1
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s2_alter_tbl2_add_char s1_begin s1_insert_tbl1 s1_insert_tbl2_3col s2_alter_tbl2_3rd_text s1_insert_tbl2_3col s1_commit s1_insert_tbl2_3col s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s2_alter_tbl2_add_char: ALTER TABLE tbl2 ADD COLUMN val3 character varying;
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s2_alter_tbl2_3rd_text: ALTER TABLE tbl2 ALTER COLUMN val3 TYPE text;
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s1_commit: COMMIT;
+step s2_alter_tbl2_3rd_text: <... completed>
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[character varying]:'1'
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[character varying]:'1'
+COMMIT
+BEGIN
+COMMIT
+BEGIN
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[text]:'1'
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s2_alter_tbl2_add_text s1_begin s1_insert_tbl1 s1_insert_tbl2_3col s2_alter_tbl2_3rd_char s1_insert_tbl2_3col s1_commit s1_insert_tbl2_3col s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s2_alter_tbl2_add_text: ALTER TABLE tbl2 ADD COLUMN val3 TEXT;
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s2_alter_tbl2_3rd_char: ALTER TABLE tbl2 ALTER COLUMN val3 TYPE character varying;
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s1_commit: COMMIT;
+step s2_alter_tbl2_3rd_char: <... completed>
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[text]:'1'
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[text]:'1'
+COMMIT
+BEGIN
+COMMIT
+BEGIN
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[character varying]:'1'
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s2_alter_tbl2_add_char s1_begin s1_insert_tbl1 s2_alter_tbl2_3rd_text s1_insert_tbl2_3col s1_commit s2_alter_tbl2_drop_3rd_col s1_insert_tbl2 s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s2_alter_tbl2_add_char: ALTER TABLE tbl2 ADD COLUMN val3 character varying;
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl2_3rd_text: ALTER TABLE tbl2 ALTER COLUMN val3 TYPE text;
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s1_commit: COMMIT;
+step s2_alter_tbl2_drop_3rd_col: ALTER TABLE tbl2 DROP COLUMN val3;
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+COMMIT
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[text]:'1'
+COMMIT
+BEGIN
+COMMIT
+BEGIN
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s2_alter_tbl2_add_text s1_begin s1_insert_tbl1 s2_alter_tbl2_3rd_char s1_insert_tbl2_3col s1_commit s2_alter_tbl2_drop_3rd_col s1_insert_tbl2 s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s2_alter_tbl2_add_text: ALTER TABLE tbl2 ADD COLUMN val3 TEXT;
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl2_3rd_char: ALTER TABLE tbl2 ALTER COLUMN val3 TYPE character varying;
+step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
+step s1_commit: COMMIT;
+step s2_alter_tbl2_drop_3rd_col: ALTER TABLE tbl2 DROP COLUMN val3;
+step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+COMMIT
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[character varying]:'1'
+COMMIT
+BEGIN
+COMMIT
+BEGIN
+table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
+COMMIT
+?column?
+
+stop
+
+starting permutation: s1_init s2_alter_tbl2_add_char s1_begin s1_insert_tbl1 s2_alter_tbl2_drop_3rd_col s1_insert_tbl1 s1_commit s2_get_changes
+step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s2_alter_tbl2_add_char: ALTER TABLE tbl2 ADD COLUMN val3 character varying;
+step s1_begin: BEGIN;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s2_alter_tbl2_drop_3rd_col: ALTER TABLE tbl2 DROP COLUMN val3;
+step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
+step s1_commit: COMMIT;
+step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
+data
+
+BEGIN
+COMMIT
+BEGIN
+COMMIT
+BEGIN
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
+COMMIT
+?column?
+
+stop
--- /dev/null
+-- predictability
+SET synchronous_commit = on;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ ?column?
+----------
+ init
+(1 row)
+
+-- fail because of an already existing slot
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ERROR: replication slot "regression_slot" already exists
+-- fail because of an invalid name
+SELECT 'init' FROM pg_create_logical_replication_slot('Invalid Name', 'test_decoding');
+ERROR: replication slot name "Invalid Name" contains invalid character
+HINT: Replication slot names may only contain letters, numbers and the underscore character.
+-- fail twice because of an invalid parameter values
+SELECT 'init' FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', 'frakbar');
+ERROR: could not parse value "frakbar" for parameter "include-xids"
+CONTEXT: slot "regression_slot", output plugin "test_decoding", in the startup callback
+SELECT 'init' FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'nonexistant-option', 'frakbar');
+ERROR: option "nonexistant-option" = "frakbar" is unknown
+CONTEXT: slot "regression_slot", output plugin "test_decoding", in the startup callback
+SELECT 'init' FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', 'frakbar');
+ERROR: could not parse value "frakbar" for parameter "include-xids"
+CONTEXT: slot "regression_slot", output plugin "test_decoding", in the startup callback
+-- succeed once
+SELECT pg_drop_replication_slot('regression_slot');
+ pg_drop_replication_slot
+--------------------------
+
+(1 row)
+
+-- fail
+SELECT pg_drop_replication_slot('regression_slot');
+ERROR: replication slot "regression_slot" does not exist
+-- check that we're detecting a streaming rep slot used for logical decoding
+SELECT 'init' FROM pg_create_physical_replication_slot('repl');
+ ?column?
+----------
+ init
+(1 row)
+
+SELECT data FROM pg_logical_slot_get_changes('repl', NULL, NULL, 'include-xids', '0');
+ERROR: cannot use physical replication slot for logical decoding
+SELECT pg_drop_replication_slot('repl');
+ pg_drop_replication_slot
+--------------------------
+
+(1 row)
+
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ ?column?
+----------
+ init
+(1 row)
+
+/* check whether status function reports us, only reproduceable columns */
+SELECT slot_name, plugin, slot_type, active,
+ NOT catalog_xmin IS NULL AS catalog_xmin_set,
+ xmin IS NULl AS data_xmin_not_set,
+ pg_xlog_location_diff(restart_lsn, '0/01000000') > 0 AS some_wal
+FROM pg_replication_slots;
+ slot_name | plugin | slot_type | active | catalog_xmin_set | data_xmin_not_set | some_wal
+-----------------+---------------+-----------+--------+------------------+-------------------+----------
+ regression_slot | test_decoding | logical | f | t | t | t
+(1 row)
+
+/*
+ * Check that changes are handled correctly when interleaved with ddl
+ */
+CREATE TABLE replication_example(id SERIAL PRIMARY KEY, somedata int, text varchar(120));
+BEGIN;
+INSERT INTO replication_example(somedata, text) VALUES (1, 1);
+INSERT INTO replication_example(somedata, text) VALUES (1, 2);
+COMMIT;
+ALTER TABLE replication_example ADD COLUMN bar int;
+INSERT INTO replication_example(somedata, text, bar) VALUES (2, 1, 4);
+BEGIN;
+INSERT INTO replication_example(somedata, text, bar) VALUES (2, 2, 4);
+INSERT INTO replication_example(somedata, text, bar) VALUES (2, 3, 4);
+INSERT INTO replication_example(somedata, text, bar) VALUES (2, 4, NULL);
+COMMIT;
+ALTER TABLE replication_example DROP COLUMN bar;
+INSERT INTO replication_example(somedata, text) VALUES (3, 1);
+BEGIN;
+INSERT INTO replication_example(somedata, text) VALUES (3, 2);
+INSERT INTO replication_example(somedata, text) VALUES (3, 3);
+COMMIT;
+ALTER TABLE replication_example RENAME COLUMN text TO somenum;
+INSERT INTO replication_example(somedata, somenum) VALUES (4, 1);
+-- collect all changes
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ data
+---------------------------------------------------------------------------------------------------------------------------
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.replication_example: INSERT: id[integer]:1 somedata[integer]:1 text[character varying]:'1'
+ table public.replication_example: INSERT: id[integer]:2 somedata[integer]:1 text[character varying]:'2'
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.replication_example: INSERT: id[integer]:3 somedata[integer]:2 text[character varying]:'1' bar[integer]:4
+ COMMIT
+ BEGIN
+ table public.replication_example: INSERT: id[integer]:4 somedata[integer]:2 text[character varying]:'2' bar[integer]:4
+ table public.replication_example: INSERT: id[integer]:5 somedata[integer]:2 text[character varying]:'3' bar[integer]:4
+ table public.replication_example: INSERT: id[integer]:6 somedata[integer]:2 text[character varying]:'4' bar[integer]:null
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.replication_example: INSERT: id[integer]:7 somedata[integer]:3 text[character varying]:'1'
+ COMMIT
+ BEGIN
+ table public.replication_example: INSERT: id[integer]:8 somedata[integer]:3 text[character varying]:'2'
+ table public.replication_example: INSERT: id[integer]:9 somedata[integer]:3 text[character varying]:'3'
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.replication_example: INSERT: id[integer]:10 somedata[integer]:4 somenum[character varying]:'1'
+ COMMIT
+(30 rows)
+
+ALTER TABLE replication_example ALTER COLUMN somenum TYPE int4 USING (somenum::int4);
+-- throw away changes, they contain oids
+SELECT count(data) FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ count
+-------
+ 12
+(1 row)
+
+INSERT INTO replication_example(somedata, somenum) VALUES (5, 1);
+BEGIN;
+INSERT INTO replication_example(somedata, somenum) VALUES (6, 1);
+ALTER TABLE replication_example ADD COLUMN zaphod1 int;
+INSERT INTO replication_example(somedata, somenum, zaphod1) VALUES (6, 2, 1);
+ALTER TABLE replication_example ADD COLUMN zaphod2 int;
+INSERT INTO replication_example(somedata, somenum, zaphod2) VALUES (6, 3, 1);
+INSERT INTO replication_example(somedata, somenum, zaphod1) VALUES (6, 4, 2);
+COMMIT;
+-- show changes
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ data
+------------------------------------------------------------------------------------------------------------------------------------------
+ BEGIN
+ table public.replication_example: INSERT: id[integer]:11 somedata[integer]:5 somenum[integer]:1
+ COMMIT
+ BEGIN
+ table public.replication_example: INSERT: id[integer]:12 somedata[integer]:6 somenum[integer]:1
+ table public.replication_example: INSERT: id[integer]:13 somedata[integer]:6 somenum[integer]:2 zaphod1[integer]:1
+ table public.replication_example: INSERT: id[integer]:14 somedata[integer]:6 somenum[integer]:3 zaphod1[integer]:null zaphod2[integer]:1
+ table public.replication_example: INSERT: id[integer]:15 somedata[integer]:6 somenum[integer]:4 zaphod1[integer]:2 zaphod2[integer]:null
+ COMMIT
+(9 rows)
+
+-- hide changes bc of oid visible in full table rewrites
+CREATE TABLE tr_unique(id2 serial unique NOT NULL, data int);
+INSERT INTO tr_unique(data) VALUES(10);
+ALTER TABLE tr_unique RENAME TO tr_pkey;
+ALTER TABLE tr_pkey ADD COLUMN id serial primary key;
+SELECT count(data) FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ count
+-------
+ 10
+(1 row)
+
+INSERT INTO tr_pkey(data) VALUES(1);
+--show deletion with primary key
+DELETE FROM tr_pkey;
+/* display results */
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ data
+----------------------------------------------------------------------------
+ BEGIN
+ table public.tr_pkey: INSERT: id2[integer]:2 data[integer]:1 id[integer]:2
+ COMMIT
+ BEGIN
+ table public.tr_pkey: DELETE: id[integer]:1
+ table public.tr_pkey: DELETE: id[integer]:2
+ COMMIT
+(7 rows)
+
+/*
+ * check that disk spooling works
+ */
+BEGIN;
+CREATE TABLE tr_etoomuch (id serial primary key, data int);
+INSERT INTO tr_etoomuch(data) SELECT g.i FROM generate_series(1, 10234) g(i);
+DELETE FROM tr_etoomuch WHERE id < 5000;
+UPDATE tr_etoomuch SET data = - data WHERE id > 5000;
+COMMIT;
+/* display results, but hide most of the output */
+SELECT count(*), min(data), max(data)
+FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0')
+GROUP BY substring(data, 1, 24)
+ORDER BY 1;
+ count | min | max
+-------+-------------------------------------------------+------------------------------------------------------------------------
+ 1 | COMMIT | COMMIT
+ 1 | BEGIN | BEGIN
+ 20467 | table public.tr_etoomuch: DELETE: id[integer]:1 | table public.tr_etoomuch: UPDATE: id[integer]:9999 data[integer]:-9999
+(3 rows)
+
+/*
+ * check whether we decode subtransactions correctly in relation with each
+ * other
+ */
+CREATE TABLE tr_sub (id serial primary key, path text);
+-- toplevel, subtxn, toplevel, subtxn, subtxn
+BEGIN;
+INSERT INTO tr_sub(path) VALUES ('1-top-#1');
+SAVEPOINT a;
+INSERT INTO tr_sub(path) VALUES ('1-top-1-#1');
+INSERT INTO tr_sub(path) VALUES ('1-top-1-#2');
+RELEASE SAVEPOINT a;
+SAVEPOINT b;
+SAVEPOINT c;
+INSERT INTO tr_sub(path) VALUES ('1-top-2-1-#1');
+INSERT INTO tr_sub(path) VALUES ('1-top-2-1-#2');
+RELEASE SAVEPOINT c;
+INSERT INTO tr_sub(path) VALUES ('1-top-2-#1');
+RELEASE SAVEPOINT b;
+COMMIT;
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ data
+----------------------------------------------------------------------
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.tr_sub: INSERT: id[integer]:1 path[text]:'1-top-#1'
+ table public.tr_sub: INSERT: id[integer]:2 path[text]:'1-top-1-#1'
+ table public.tr_sub: INSERT: id[integer]:3 path[text]:'1-top-1-#2'
+ table public.tr_sub: INSERT: id[integer]:4 path[text]:'1-top-2-1-#1'
+ table public.tr_sub: INSERT: id[integer]:5 path[text]:'1-top-2-1-#2'
+ table public.tr_sub: INSERT: id[integer]:6 path[text]:'1-top-2-#1'
+ COMMIT
+(10 rows)
+
+-- check that we handle xlog assignments correctly
+BEGIN;
+-- nest 80 subtxns
+SAVEPOINT subtop;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+-- assign xid by inserting
+INSERT INTO tr_sub(path) VALUES ('2-top-1...--#1');
+INSERT INTO tr_sub(path) VALUES ('2-top-1...--#2');
+INSERT INTO tr_sub(path) VALUES ('2-top-1...--#3');
+RELEASE SAVEPOINT subtop;
+INSERT INTO tr_sub(path) VALUES ('2-top-#1');
+COMMIT;
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ data
+------------------------------------------------------------------------
+ BEGIN
+ table public.tr_sub: INSERT: id[integer]:7 path[text]:'2-top-1...--#1'
+ table public.tr_sub: INSERT: id[integer]:8 path[text]:'2-top-1...--#2'
+ table public.tr_sub: INSERT: id[integer]:9 path[text]:'2-top-1...--#3'
+ table public.tr_sub: INSERT: id[integer]:10 path[text]:'2-top-#1'
+ COMMIT
+(6 rows)
+
+-- make sure rollbacked subtransactions aren't decoded
+BEGIN;
+INSERT INTO tr_sub(path) VALUES ('3-top-2-#1');
+SAVEPOINT a;
+INSERT INTO tr_sub(path) VALUES ('3-top-2-1-#1');
+SAVEPOINT b;
+INSERT INTO tr_sub(path) VALUES ('3-top-2-2-#1');
+ROLLBACK TO SAVEPOINT b;
+INSERT INTO tr_sub(path) VALUES ('3-top-2-#2');
+COMMIT;
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ data
+-----------------------------------------------------------------------
+ BEGIN
+ table public.tr_sub: INSERT: id[integer]:11 path[text]:'3-top-2-#1'
+ table public.tr_sub: INSERT: id[integer]:12 path[text]:'3-top-2-1-#1'
+ table public.tr_sub: INSERT: id[integer]:14 path[text]:'3-top-2-#2'
+ COMMIT
+(5 rows)
+
+-- test whether a known, but not yet logged toplevel xact, followed by a
+-- subxact commit is handled correctly
+BEGIN;
+SELECT txid_current() != 0; -- so no fixed xid apears in the outfile
+ ?column?
+----------
+ t
+(1 row)
+
+SAVEPOINT a;
+INSERT INTO tr_sub(path) VALUES ('4-top-1-#1');
+RELEASE SAVEPOINT a;
+COMMIT;
+-- test whether a change in a subtransaction, in an unknown toplevel
+-- xact is handled correctly.
+BEGIN;
+SAVEPOINT a;
+INSERT INTO tr_sub(path) VALUES ('5-top-1-#1');
+COMMIT;
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ data
+---------------------------------------------------------------------
+ BEGIN
+ table public.tr_sub: INSERT: id[integer]:15 path[text]:'4-top-1-#1'
+ COMMIT
+ BEGIN
+ table public.tr_sub: INSERT: id[integer]:16 path[text]:'5-top-1-#1'
+ COMMIT
+(6 rows)
+
+/*
+ * Check whether treating a table as a catalog table works somewhat
+ */
+CREATE TABLE replication_metadata (
+ id serial primary key,
+ relation name NOT NULL,
+ options text[]
+)
+WITH (user_catalog_table = true)
+;
+\d+ replication_metadata
+ Table "public.replication_metadata"
+ Column | Type | Modifiers | Storage | Stats target | Description
+----------+---------+-------------------------------------------------------------------+----------+--------------+-------------
+ id | integer | not null default nextval('replication_metadata_id_seq'::regclass) | plain | |
+ relation | name | not null | plain | |
+ options | text[] | | extended | |
+Indexes:
+ "replication_metadata_pkey" PRIMARY KEY, btree (id)
+Has OIDs: no
+Options: user_catalog_table=true
+
+INSERT INTO replication_metadata(relation, options)
+VALUES ('foo', ARRAY['a', 'b']);
+ALTER TABLE replication_metadata RESET (user_catalog_table);
+\d+ replication_metadata
+ Table "public.replication_metadata"
+ Column | Type | Modifiers | Storage | Stats target | Description
+----------+---------+-------------------------------------------------------------------+----------+--------------+-------------
+ id | integer | not null default nextval('replication_metadata_id_seq'::regclass) | plain | |
+ relation | name | not null | plain | |
+ options | text[] | | extended | |
+Indexes:
+ "replication_metadata_pkey" PRIMARY KEY, btree (id)
+Has OIDs: no
+
+INSERT INTO replication_metadata(relation, options)
+VALUES ('bar', ARRAY['a', 'b']);
+ALTER TABLE replication_metadata SET (user_catalog_table = true);
+\d+ replication_metadata
+ Table "public.replication_metadata"
+ Column | Type | Modifiers | Storage | Stats target | Description
+----------+---------+-------------------------------------------------------------------+----------+--------------+-------------
+ id | integer | not null default nextval('replication_metadata_id_seq'::regclass) | plain | |
+ relation | name | not null | plain | |
+ options | text[] | | extended | |
+Indexes:
+ "replication_metadata_pkey" PRIMARY KEY, btree (id)
+Has OIDs: no
+Options: user_catalog_table=true
+
+INSERT INTO replication_metadata(relation, options)
+VALUES ('blub', NULL);
+-- make sure rewrites don't work
+ALTER TABLE replication_metadata ADD COLUMN rewritemeornot int;
+ALTER TABLE replication_metadata ALTER COLUMN rewritemeornot TYPE text;
+ERROR: cannot rewrite table "replication_metadata" used as a catalog table
+ALTER TABLE replication_metadata SET (user_catalog_table = false);
+\d+ replication_metadata
+ Table "public.replication_metadata"
+ Column | Type | Modifiers | Storage | Stats target | Description
+----------------+---------+-------------------------------------------------------------------+----------+--------------+-------------
+ id | integer | not null default nextval('replication_metadata_id_seq'::regclass) | plain | |
+ relation | name | not null | plain | |
+ options | text[] | | extended | |
+ rewritemeornot | integer | | plain | |
+Indexes:
+ "replication_metadata_pkey" PRIMARY KEY, btree (id)
+Has OIDs: no
+Options: user_catalog_table=false
+
+INSERT INTO replication_metadata(relation, options)
+VALUES ('zaphod', NULL);
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ data
+------------------------------------------------------------------------------------------------------------------------------------
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.replication_metadata: INSERT: id[integer]:1 relation[name]:'foo' options[text[]]:'{a,b}'
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.replication_metadata: INSERT: id[integer]:2 relation[name]:'bar' options[text[]]:'{a,b}'
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.replication_metadata: INSERT: id[integer]:3 relation[name]:'blub' options[text[]]:null
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.replication_metadata: INSERT: id[integer]:4 relation[name]:'zaphod' options[text[]]:null rewritemeornot[integer]:null
+ COMMIT
+(22 rows)
+
+/*
+ * check whether we handle updates/deletes correct with & without a pkey
+ */
+/* we should handle the case without a key at all more gracefully */
+CREATE TABLE table_without_key(id serial, data int);
+INSERT INTO table_without_key(data) VALUES(1),(2);
+DELETE FROM table_without_key WHERE data = 1;
+-- won't log old keys
+UPDATE table_without_key SET data = 3 WHERE data = 2;
+UPDATE table_without_key SET id = -id;
+UPDATE table_without_key SET id = -id;
+-- should log the full old row now
+ALTER TABLE table_without_key REPLICA IDENTITY FULL;
+UPDATE table_without_key SET data = 3 WHERE data = 2;
+UPDATE table_without_key SET id = -id;
+UPDATE table_without_key SET id = -id;
+DELETE FROM table_without_key WHERE data = 3;
+CREATE TABLE table_with_pkey(id serial primary key, data int);
+INSERT INTO table_with_pkey(data) VALUES(1), (2);
+DELETE FROM table_with_pkey WHERE data = 1;
+-- should log the old pkey
+UPDATE table_with_pkey SET data = 3 WHERE data = 2;
+UPDATE table_with_pkey SET id = -id;
+UPDATE table_with_pkey SET id = -id;
+-- check that we log nothing despite having a pkey
+ALTER TABLE table_without_key REPLICA IDENTITY NOTHING;
+UPDATE table_with_pkey SET id = -id;
+-- check that we log everything despite having a pkey
+ALTER TABLE table_without_key REPLICA IDENTITY FULL;
+UPDATE table_with_pkey SET id = -id;
+DELETE FROM table_with_pkey WHERE data = 3;
+CREATE TABLE table_with_unique_not_null(id serial unique, data int);
+ALTER TABLE table_with_unique_not_null ALTER COLUMN id SET NOT NULL; --already set
+-- won't log anything, replica identity not setup
+INSERT INTO table_with_unique_not_null(data) VALUES(1), (2);
+DELETE FROM table_with_unique_not_null WHERE data = 1;
+UPDATE table_with_unique_not_null SET data = 3 WHERE data = 2;
+UPDATE table_with_unique_not_null SET id = -id;
+UPDATE table_with_unique_not_null SET id = -id;
+DELETE FROM table_with_unique_not_null WHERE data = 3;
+-- should log old key
+ALTER TABLE table_with_unique_not_null REPLICA IDENTITY USING INDEX table_with_unique_not_null_id_key;
+INSERT INTO table_with_unique_not_null(data) VALUES(1), (2);
+DELETE FROM table_with_unique_not_null WHERE data = 1;
+UPDATE table_with_unique_not_null SET data = 3 WHERE data = 2;
+UPDATE table_with_unique_not_null SET id = -id;
+UPDATE table_with_unique_not_null SET id = -id;
+DELETE FROM table_with_unique_not_null WHERE data = 3;
+-- check toast support
+BEGIN;
+CREATE SEQUENCE toasttable_rand_seq START 79 INCREMENT 1499; -- portable "random"
+CREATE TABLE toasttable(
+ id serial primary key,
+ toasted_col1 text,
+ rand1 float8 DEFAULT nextval('toasttable_rand_seq'),
+ toasted_col2 text,
+ rand2 float8 DEFAULT nextval('toasttable_rand_seq')
+ );
+COMMIT;
+-- uncompressed external toast data
+INSERT INTO toasttable(toasted_col1) SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i);
+-- compressed external toast data
+INSERT INTO toasttable(toasted_col2) SELECT repeat(string_agg(to_char(g.i, 'FM0000'), ''), 50) FROM generate_series(1, 500) g(i);
+-- update of existing column
+UPDATE toasttable
+ SET toasted_col1 = (SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i))
+WHERE id = 1;
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ data
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------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---------------------------------------------------------------------------------------------------------------------------------------------------------
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.table_without_key: INSERT: id[integer]:1 data[integer]:1
+ table public.table_without_key: INSERT: id[integer]:2 data[integer]:2
+ COMMIT
+ BEGIN
+ table public.table_without_key: DELETE: (no-tuple-data)
+ COMMIT
+ BEGIN
+ table public.table_without_key: UPDATE: id[integer]:2 data[integer]:3
+ COMMIT
+ BEGIN
+ table public.table_without_key: UPDATE: id[integer]:-2 data[integer]:3
+ COMMIT
+ BEGIN
+ table public.table_without_key: UPDATE: id[integer]:2 data[integer]:3
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.table_without_key: UPDATE: old-key: id[integer]:2 data[integer]:3 new-tuple: id[integer]:-2 data[integer]:3
+ COMMIT
+ BEGIN
+ table public.table_without_key: UPDATE: old-key: id[integer]:-2 data[integer]:3 new-tuple: id[integer]:2 data[integer]:3
+ COMMIT
+ BEGIN
+ table public.table_without_key: DELETE: id[integer]:2 data[integer]:3
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.table_with_pkey: INSERT: id[integer]:1 data[integer]:1
+ table public.table_with_pkey: INSERT: id[integer]:2 data[integer]:2
+ COMMIT
+ BEGIN
+ table public.table_with_pkey: DELETE: id[integer]:1
+ COMMIT
+ BEGIN
+ table public.table_with_pkey: UPDATE: id[integer]:2 data[integer]:3
+ COMMIT
+ BEGIN
+ table public.table_with_pkey: UPDATE: old-key: id[integer]:2 new-tuple: id[integer]:-2 data[integer]:3
+ COMMIT
+ BEGIN
+ table public.table_with_pkey: UPDATE: old-key: id[integer]:-2 new-tuple: id[integer]:2 data[integer]:3
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.table_with_pkey: UPDATE: old-key: id[integer]:2 new-tuple: id[integer]:-2 data[integer]:3
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.table_with_pkey: UPDATE: old-key: id[integer]:-2 new-tuple: id[integer]:2 data[integer]:3
+ COMMIT
+ BEGIN
+ table public.table_with_pkey: DELETE: id[integer]:2
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.table_with_unique_not_null: INSERT: id[integer]:1 data[integer]:1
+ table public.table_with_unique_not_null: INSERT: id[integer]:2 data[integer]:2
+ COMMIT
+ BEGIN
+ table public.table_with_unique_not_null: DELETE: (no-tuple-data)
+ COMMIT
+ BEGIN
+ table public.table_with_unique_not_null: UPDATE: id[integer]:2 data[integer]:3
+ COMMIT
+ BEGIN
+ table public.table_with_unique_not_null: UPDATE: id[integer]:-2 data[integer]:3
+ COMMIT
+ BEGIN
+ table public.table_with_unique_not_null: UPDATE: id[integer]:2 data[integer]:3
+ COMMIT
+ BEGIN
+ table public.table_with_unique_not_null: DELETE: (no-tuple-data)
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.table_with_unique_not_null: INSERT: id[integer]:3 data[integer]:1
+ table public.table_with_unique_not_null: INSERT: id[integer]:4 data[integer]:2
+ COMMIT
+ BEGIN
+ table public.table_with_unique_not_null: DELETE: id[integer]:3
+ COMMIT
+ BEGIN
+ table public.table_with_unique_not_null: UPDATE: id[integer]:4 data[integer]:3
+ COMMIT
+ BEGIN
+ table public.table_with_unique_not_null: UPDATE: old-key: id[integer]:4 new-tuple: id[integer]:-4 data[integer]:3
+ COMMIT
+ BEGIN
+ table public.table_with_unique_not_null: UPDATE: old-key: id[integer]:-4 new-tuple: id[integer]:4 data[integer]:3
+ COMMIT
+ BEGIN
+ table public.table_with_unique_not_null: DELETE: id[integer]:4
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.toasttable: INSERT: id[integer]:1 toasted_col1[text]:'123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179118011811182118311841185118611871188118911901191119211931194119511961197119811991200120112021203120412051206120712081209121012111212121312141215121612171218121912201221122212231224122512261227122812291230123112321233123412351236123712381239124012411242124312441245124612471248124912501251125212531254125512561257125812591260126112621263126412651266126712681269127012711272127312741275127612771278127912801281128212831284128512861287128812891290129112921293129412951296129712981299130013011302130313041305130613071308130913101311131213131314131513161317131813191320132113221323132413251326132713281329133013311332133313341335133613371338133913401341134213431344134513461347134813491350135113521353135413551356135713581359136013611362136313641365136613671368136913701371137213731374137513761377137813791380138113821383138413851386138713881389139013911392139313941395139613971398139914001401140214031404140514061407140814091410141114121413141414151416141714181419142014211422142314241425142614271428142914301431143214331434143514361437143814391440144114421443144414451446144714481449145014511452145314541455145614571458145914601461146214631464146514661467146814691470147114721473147414751476147714781479148014811482148314841485148614871488148914901491149214931494149514961497149814991500150115021503150415051506150715081509151015111512151315141515151615171518151915201521152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rand1[double precision]:79 toasted_col2[text]:null rand2[double precision]:1578
+ COMMIT
+ BEGIN
+ table public.toasttable: INSERT: id[integer]:2 toasted_col1[text]:null rand1[double precision]:3077 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04960497049804990500' rand2[double precision]:4576
+ COMMIT
+ BEGIN
+ table public.toasttable: UPDATE: id[integer]:1 toasted_col1[text]:'123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179118011811182118311841185118611871188118911901191119211931194119511961197119811991200120112021203120412051206120712081209121012111212121312141215121612171218121912201221122212231224122512261227122812291230123112321233123412351236123712381239124012411242124312441245124612471248124912501251125212531254125512561257125812591260126112621263126412651266126712681269127012711272127312741275127612771278127912801281128212831284128512861287128812891290129112921293129412951296129712981299130013011302130313041305130613071308130913101311131213131314131513161317131813191320132113221323132413251326132713281329133013311332133313341335133613371338133913401341134213431344134513461347134813491350135113521353135413551356135713581359136013611362136313641365136613671368136913701371137213731374137513761377137813791380138113821383138413851386138713881389139013911392139313941395139613971398139914001401140214031404140514061407140814091410141114121413141414151416141714181419142014211422142314241425142614271428142914301431143214331434143514361437143814391440144114421443144414451446144714481449145014511452145314541455145614571458145914601461146214631464146514661467146814691470147114721473147414751476147714781479148014811482148314841485148614871488148914901491149214931494149514961497149814991500150115021503150415051506150715081509151015111512151315141515151615171518151915201521152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rand1[double precision]:79 toasted_col2[text]:null rand2[double precision]:1578
+ COMMIT
+(113 rows)
+
+INSERT INTO toasttable(toasted_col1) SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i);
+-- update of second column, first column unchanged
+UPDATE toasttable
+ SET toasted_col2 = (SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i))
+WHERE id = 1;
+-- make sure we decode correctly even if the toast table is gone
+DROP TABLE toasttable;
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ data
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ BEGIN
+ table public.toasttable: INSERT: id[integer]:3 toasted_col1[text]:'123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179118011811182118311841185118611871188118911901191119211931194119511961197119811991200120112021203120412051206120712081209121012111212121312141215121612171218121912201221122212231224122512261227122812291230123112321233123412351236123712381239124012411242124312441245124612471248124912501251125212531254125512561257125812591260126112621263126412651266126712681269127012711272127312741275127612771278127912801281128212831284128512861287128812891290129112921293129412951296129712981299130013011302130313041305130613071308130913101311131213131314131513161317131813191320132113221323132413251326132713281329133013311332133313341335133613371338133913401341134213431344134513461347134813491350135113521353135413551356135713581359136013611362136313641365136613671368136913701371137213731374137513761377137813791380138113821383138413851386138713881389139013911392139313941395139613971398139914001401140214031404140514061407140814091410141114121413141414151416141714181419142014211422142314241425142614271428142914301431143214331434143514361437143814391440144114421443144414451446144714481449145014511452145314541455145614571458145914601461146214631464146514661467146814691470147114721473147414751476147714781479148014811482148314841485148614871488148914901491149214931494149514961497149814991500150115021503150415051506150715081509151015111512151315141515151615171518151915201521152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rand1[double precision]:6075 toasted_col2[text]:null rand2[double precision]:7574
+ COMMIT
+ BEGIN
+ table public.toasttable: UPDATE: id[integer]:1 toasted_col1[text]:unchanged-toast-datum rand1[double precision]:79 toasted_col2[text]:'12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169117011711172117311741175117611771178117911801181118211831184118511861187118811891190119111921193119411951196119711981199120012011202120312041205120612071208120912101211121212131214121512161217121812191220122112221223122412251226122712281229123012311232123312341235123612371238123912401241124212431244124512461247124812491250125112521253125412551256125712581259126012611262126312641265126612671268126912701271127212731274127512761277127812791280128112821283128412851286128712881289129012911292129312941295129612971298129913001301130213031304130513061307130813091310131113121313131413151316131713181319132013211322132313241325132613271328132913301331133213331334133513361337133813391340134113421343134413451346134713481349135013511352135313541355135613571358135913601361136213631364136513661367136813691370137113721373137413751376137713781379138013811382138313841385138613871388138913901391139213931394139513961397139813991400140114021403140414051406140714081409141014111412141314141415141614171418141914201421142214231424142514261427142814291430143114321433143414351436143714381439144014411442144314441445144614471448144914501451145214531454145514561457145814591460146114621463146414651466146714681469147014711472147314741475147614771478147914801481148214831484148514861487148814891490149114921493149414951496149714981499150015011502150315041505150615071508150915101511151215131514151515161517151815191520152115221523152415251526152715281529153015311532153315341535153615371538153915401541154215431544154515461547154815491550155115521553155415551556155715581559156015611562156315641565156615671568156915701571157215731574157515761577157815791580158115821583158415851586158715881589159015911592159315941595159615971598159916001601160216031604160516061607160816091610161116121613161416151616161716181619162016211622162316241625162616271628162916301631163216331634163516361637163816391640164116421643164416451646164716481649165016511652165316541655165616571658165916601661166216631664166516661667166816691670167116721673167416751676167716781679168016811682168316841685168616871688168916901691169216931694169516961697169816991700170117021703170417051706170717081709171017111712171317141715171617171718171917201721172217231724172517261727172817291730173117321733173417351736173717381739174017411742174317441745174617471748174917501751175217531754175517561757175817591760176117621763176417651766176717681769177017711772177317741775177617771778177917801781178217831784178517861787178817891790179117921793179417951796179717981799180018011802180318041805180618071808180918101811181218131814181518161817181818191820182118221823182418251826182718281829183018311832183318341835183618371838183918401841184218431844184518461847184818491850185118521853185418551856185718581859186018611862186318641865186618671868186918701871187218731874187518761877187818791880188118821883188418851886188718881889189018911892189318941895189618971898189919001901190219031904190519061907190819091910191119121913191419151916191719181919192019211922192319241925192619271928192919301931193219331934193519361937193819391940194119421943194419451946194719481949195019511952195319541955195619571958195919601961196219631964196519661967196819691970197119721973197419751976197719781979198019811982198319841985198619871988198919901991199219931994199519961997199819992000' rand2[double precision]:1578
+ COMMIT
+ BEGIN
+ COMMIT
+(8 rows)
+
+-- done, free logical replication slot
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ data
+------
+(0 rows)
+
+SELECT pg_drop_replication_slot('regression_slot');
+ pg_drop_replication_slot
+--------------------------
+
+(1 row)
+
+/* check that we aren't visible anymore now */
+SELECT * FROM pg_stat_replication;
+ pid | usesysid | usename | application_name | client_addr | client_hostname | client_port | backend_start | backend_xmin | state | sent_location | write_location | flush_location | replay_location | sync_priority | sync_state
+-----+----------+---------+------------------+-------------+-----------------+-------------+---------------+--------------+-------+---------------+----------------+----------------+-----------------+---------------+------------
+(0 rows)
+
--- /dev/null
+-- predictability
+SET synchronous_commit = on;
+-- fail because we're creating a slot while in an xact with xid
+BEGIN;
+SELECT txid_current() = 0;
+ ?column?
+----------
+ f
+(1 row)
+
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ERROR: cannot create logical replication slot in transaction that has performed writes
+ROLLBACK;
+-- fail because we're creating a slot while in an subxact whose topxact has a xid
+BEGIN;
+SELECT txid_current() = 0;
+ ?column?
+----------
+ f
+(1 row)
+
+SAVEPOINT barf;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ERROR: cannot create logical replication slot in transaction that has performed writes
+ROLLBACK TO SAVEPOINT barf;
+ROLLBACK;
+-- succeed, outside tx.
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ ?column?
+----------
+ init
+(1 row)
+
+SELECT 'stop' FROM pg_drop_replication_slot('regression_slot');
+ ?column?
+----------
+ stop
+(1 row)
+
+-- succeed, in tx without xid.
+BEGIN;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ ?column?
+----------
+ init
+(1 row)
+
+COMMIT;
+CREATE TABLE nobarf(id serial primary key, data text);
+INSERT INTO nobarf(data) VALUES('1');
+-- decoding works in transaction with xid
+BEGIN;
+SELECT txid_current() = 0;
+ ?column?
+----------
+ f
+(1 row)
+
+-- don't show yet, haven't committed
+INSERT INTO nobarf(data) VALUES('2');
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ data
+-----------------------------------------------------------
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.nobarf: INSERT: id[integer]:1 data[text]:'1'
+ COMMIT
+(5 rows)
+
+COMMIT;
+INSERT INTO nobarf(data) VALUES('3');
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ data
+-----------------------------------------------------------
+ BEGIN
+ table public.nobarf: INSERT: id[integer]:2 data[text]:'2'
+ COMMIT
+ BEGIN
+ table public.nobarf: INSERT: id[integer]:3 data[text]:'3'
+ COMMIT
+(6 rows)
+
+SELECT 'stop' FROM pg_drop_replication_slot('regression_slot');
+ ?column?
+----------
+ stop
+(1 row)
+
--- /dev/null
+Parsed test spec with 2 sessions
+
+starting permutation: s1b s1w s2init s1c s2start s1b s1w s1c s2start s1b s1w s2start s1c s2start
+step s1b: BEGIN ISOLATION LEVEL SERIALIZABLE;
+step s1w: INSERT INTO do_write DEFAULT VALUES;
+step s2init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+step s1c: COMMIT;
+step s2init: <... completed>
+?column?
+
+init
+step s2start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
+data
+
+step s1b: BEGIN ISOLATION LEVEL SERIALIZABLE;
+step s1w: INSERT INTO do_write DEFAULT VALUES;
+step s1c: COMMIT;
+step s2start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
+data
+
+BEGIN
+table public.do_write: INSERT: id[integer]:2
+COMMIT
+step s1b: BEGIN ISOLATION LEVEL SERIALIZABLE;
+step s1w: INSERT INTO do_write DEFAULT VALUES;
+step s2start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
+data
+
+step s1c: COMMIT;
+step s2start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
+data
+
+BEGIN
+table public.do_write: INSERT: id[integer]:3
+COMMIT
+?column?
+
+stop
--- /dev/null
+Parsed test spec with 3 sessions
+
+starting permutation: s0init s0start s1begin s1sharepgclass s2begin s2sharepgclass s0w s0start s2commit s1commit
+step s0init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s0start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
+data
+
+step s1begin: BEGIN;
+step s1sharepgclass: SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR SHARE) s;
+?column?
+
+t
+step s2begin: BEGIN;
+step s2sharepgclass: SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR SHARE) s;
+?column?
+
+t
+step s0w: INSERT INTO do_write DEFAULT VALUES;
+step s0start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
+data
+
+BEGIN
+table public.do_write: INSERT: id[integer]:1
+COMMIT
+step s2commit: COMMIT;
+step s1commit: COMMIT;
+?column?
+
+stop
+
+starting permutation: s0init s0start s1begin s1keysharepgclass s2begin s2keysharepgclass s0alter s0w s0start s2commit s1commit
+step s0init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
+?column?
+
+init
+step s0start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
+data
+
+step s1begin: BEGIN;
+step s1keysharepgclass: SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR KEY SHARE) s;
+?column?
+
+t
+step s2begin: BEGIN;
+step s2keysharepgclass: SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR KEY SHARE) s;
+?column?
+
+t
+step s0alter: ALTER TABLE do_write ADD column ts timestamptz;
+step s0w: INSERT INTO do_write DEFAULT VALUES;
+step s0start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
+data
+
+BEGIN
+COMMIT
+BEGIN
+table public.do_write: INSERT: id[integer]:1 ts[timestamp with time zone]:null
+COMMIT
+step s2commit: COMMIT;
+step s1commit: COMMIT;
+?column?
+
+stop
--- /dev/null
+-- predictability
+SET synchronous_commit = on;
+-- setup
+CREATE ROLE lr_normal;
+CREATE ROLE lr_superuser SUPERUSER;
+CREATE ROLE lr_replication REPLICATION;
+CREATE TABLE lr_test(data text);
+-- superuser can control replication
+SET ROLE lr_superuser;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ ?column?
+----------
+ init
+(1 row)
+
+INSERT INTO lr_test VALUES('lr_superuser_init');
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ data
+--------------------------------------------------------------
+ BEGIN
+ table public.lr_test: INSERT: data[text]:'lr_superuser_init'
+ COMMIT
+(3 rows)
+
+SELECT pg_drop_replication_slot('regression_slot');
+ pg_drop_replication_slot
+--------------------------
+
+(1 row)
+
+RESET ROLE;
+-- replication user can control replication
+SET ROLE lr_replication;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ ?column?
+----------
+ init
+(1 row)
+
+INSERT INTO lr_test VALUES('lr_superuser_init');
+ERROR: permission denied for relation lr_test
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ data
+------
+(0 rows)
+
+SELECT pg_drop_replication_slot('regression_slot');
+ pg_drop_replication_slot
+--------------------------
+
+(1 row)
+
+RESET ROLE;
+-- plain user *can't* can control replication
+SET ROLE lr_normal;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ERROR: must be superuser or replication role to use replication slots
+INSERT INTO lr_test VALUES('lr_superuser_init');
+ERROR: permission denied for relation lr_test
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ERROR: must be superuser or replication role to use replication slots
+SELECT pg_drop_replication_slot('regression_slot');
+ERROR: must be superuser or replication role to use replication slots
+RESET ROLE;
+-- replication users can drop superuser created slots
+SET ROLE lr_superuser;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ ?column?
+----------
+ init
+(1 row)
+
+RESET ROLE;
+SET ROLE lr_replication;
+SELECT pg_drop_replication_slot('regression_slot');
+ pg_drop_replication_slot
+--------------------------
+
+(1 row)
+
+RESET ROLE;
+-- normal users can't drop existing slots
+SET ROLE lr_superuser;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ ?column?
+----------
+ init
+(1 row)
+
+RESET ROLE;
+SET ROLE lr_normal;
+SELECT pg_drop_replication_slot('regression_slot');
+ERROR: must be superuser or replication role to use replication slots
+RESET ROLE;
+-- all users can see existing slots
+SET ROLE lr_superuser;
+SELECT slot_name, plugin FROM pg_replication_slots;
+ slot_name | plugin
+-----------------+---------------
+ regression_slot | test_decoding
+(1 row)
+
+RESET ROLE;
+SET ROLE lr_replication;
+SELECT slot_name, plugin FROM pg_replication_slots;
+ slot_name | plugin
+-----------------+---------------
+ regression_slot | test_decoding
+(1 row)
+
+RESET ROLE;
+SET ROLE lr_normal;
+SELECT slot_name, plugin FROM pg_replication_slots;
+ slot_name | plugin
+-----------------+---------------
+ regression_slot | test_decoding
+(1 row)
+
+RESET ROLE;
+-- cleanup
+SELECT pg_drop_replication_slot('regression_slot');
+ pg_drop_replication_slot
+--------------------------
+
+(1 row)
+
+DROP ROLE lr_normal;
+DROP ROLE lr_superuser;
+DROP ROLE lr_replication;
+DROP TABLE lr_test;
--- /dev/null
+-- predictability
+SET synchronous_commit = on;
+DROP TABLE IF EXISTS replication_example;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ ?column?
+----------
+ init
+(1 row)
+
+CREATE TABLE replication_example(id SERIAL PRIMARY KEY, somedata int, text varchar(120));
+INSERT INTO replication_example(somedata) VALUES (1);
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ data
+----------------------------------------------------------------------------------------------------------
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.replication_example: INSERT: id[integer]:1 somedata[integer]:1 text[character varying]:null
+ COMMIT
+(5 rows)
+
+BEGIN;
+INSERT INTO replication_example(somedata) VALUES (2);
+ALTER TABLE replication_example ADD COLUMN testcolumn1 int;
+INSERT INTO replication_example(somedata, testcolumn1) VALUES (3, 1);
+COMMIT;
+BEGIN;
+INSERT INTO replication_example(somedata) VALUES (3);
+ALTER TABLE replication_example ADD COLUMN testcolumn2 int;
+INSERT INTO replication_example(somedata, testcolumn1, testcolumn2) VALUES (4, 2, 1);
+COMMIT;
+VACUUM FULL pg_am;
+VACUUM FULL pg_amop;
+VACUUM FULL pg_proc;
+VACUUM FULL pg_opclass;
+VACUUM FULL pg_type;
+VACUUM FULL pg_index;
+VACUUM FULL pg_database;
+-- repeated rewrites that fail
+BEGIN;
+CLUSTER pg_class USING pg_class_oid_index;
+CLUSTER pg_class USING pg_class_oid_index;
+ROLLBACK;
+-- repeated rewrites that succeed
+BEGIN;
+CLUSTER pg_class USING pg_class_oid_index;
+CLUSTER pg_class USING pg_class_oid_index;
+CLUSTER pg_class USING pg_class_oid_index;
+COMMIT;
+ -- repeated rewrites in different transactions
+VACUUM FULL pg_class;
+VACUUM FULL pg_class;
+INSERT INTO replication_example(somedata, testcolumn1) VALUES (5, 3);
+BEGIN;
+INSERT INTO replication_example(somedata, testcolumn1) VALUES (6, 4);
+ALTER TABLE replication_example ADD COLUMN testcolumn3 int;
+INSERT INTO replication_example(somedata, testcolumn1, testcolumn3) VALUES (7, 5, 1);
+COMMIT;
+-- make old files go away
+CHECKPOINT;
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ data
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ BEGIN
+ table public.replication_example: INSERT: id[integer]:2 somedata[integer]:2 text[character varying]:null
+ table public.replication_example: INSERT: id[integer]:3 somedata[integer]:3 text[character varying]:null testcolumn1[integer]:1
+ COMMIT
+ BEGIN
+ table public.replication_example: INSERT: id[integer]:4 somedata[integer]:3 text[character varying]:null testcolumn1[integer]:null
+ table public.replication_example: INSERT: id[integer]:5 somedata[integer]:4 text[character varying]:null testcolumn1[integer]:2 testcolumn2[integer]:1
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.replication_example: INSERT: id[integer]:6 somedata[integer]:5 text[character varying]:null testcolumn1[integer]:3 testcolumn2[integer]:null
+ COMMIT
+ BEGIN
+ table public.replication_example: INSERT: id[integer]:7 somedata[integer]:6 text[character varying]:null testcolumn1[integer]:4 testcolumn2[integer]:null
+ table public.replication_example: INSERT: id[integer]:8 somedata[integer]:7 text[character varying]:null testcolumn1[integer]:5 testcolumn2[integer]:null testcolumn3[integer]:1
+ COMMIT
+(35 rows)
+
+SELECT pg_drop_replication_slot('regression_slot');
+ pg_drop_replication_slot
+--------------------------
+
+(1 row)
+
+DROP TABLE IF EXISTS replication_example;
--- /dev/null
+-- predictability
+SET synchronous_commit = on;
+DROP TABLE IF EXISTS xpto;
+NOTICE: table "xpto" does not exist, skipping
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ ?column?
+----------
+ init
+(1 row)
+
+CREATE SEQUENCE xpto_rand_seq START 79 INCREMENT 1499; -- portable "random"
+CREATE TABLE xpto (
+ id serial primary key,
+ toasted_col1 text,
+ rand1 float8 DEFAULT nextval('xpto_rand_seq'),
+ toasted_col2 text,
+ rand2 float8 DEFAULT nextval('xpto_rand_seq')
+);
+-- uncompressed external toast data
+INSERT INTO xpto (toasted_col1, toasted_col2) SELECT string_agg(g.i::text, ''), string_agg((g.i*2)::text, '') FROM generate_series(1, 2000) g(i);
+-- compressed external toast data
+INSERT INTO xpto (toasted_col2) SELECT repeat(string_agg(to_char(g.i, 'FM0000'), ''), 50) FROM generate_series(1, 500) g(i);
+-- update of existing column
+UPDATE xpto SET toasted_col1 = (SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i)) WHERE id = 1;
+UPDATE xpto SET rand1 = 123.456 WHERE id = 1;
+DELETE FROM xpto WHERE id = 1;
+DROP TABLE IF EXISTS toasted_key;
+NOTICE: table "toasted_key" does not exist, skipping
+CREATE TABLE toasted_key (
+ id serial,
+ toasted_key text PRIMARY KEY,
+ toasted_col1 text,
+ toasted_col2 text
+);
+ALTER TABLE toasted_key ALTER COLUMN toasted_key SET STORAGE EXTERNAL;
+ALTER TABLE toasted_key ALTER COLUMN toasted_col1 SET STORAGE EXTERNAL;
+INSERT INTO toasted_key(toasted_key, toasted_col1) VALUES(repeat('1234567890', 200), repeat('9876543210', 200));
+-- test update of a toasted key without changing it
+UPDATE toasted_key SET toasted_col2 = toasted_col1;
+-- test update of a toasted key, changing it
+UPDATE toasted_key SET toasted_key = toasted_key || '1';
+DELETE FROM toasted_key;
+SELECT substr(data, 1, 200) FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+ substr
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ BEGIN
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.xpto: INSERT: id[integer]:1 toasted_col1[text]:'1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374
+ COMMIT
+ BEGIN
+ table public.xpto: INSERT: id[integer]:2 toasted_col1[text]:null rand1[double precision]:3077 toasted_col2[text]:'00010002000300040005000600070008000900100011001200130014001500160017001800190020002100
+ COMMIT
+ BEGIN
+ table public.xpto: UPDATE: id[integer]:1 toasted_col1[text]:'1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374
+ COMMIT
+ BEGIN
+ table public.xpto: UPDATE: id[integer]:1 toasted_col1[text]:unchanged-toast-datum rand1[double precision]:123.456 toasted_col2[text]:unchanged-toast-datum rand2[double precision]:1578
+ COMMIT
+ BEGIN
+ table public.xpto: DELETE: id[integer]:1
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ COMMIT
+ BEGIN
+ table public.toasted_key: INSERT: id[integer]:1 toasted_key[text]:'1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123
+ COMMIT
+ BEGIN
+ table public.toasted_key: UPDATE: id[integer]:1 toasted_key[text]:unchanged-toast-datum toasted_col1[text]:unchanged-toast-datum toasted_col2[text]:'987654321098765432109876543210987654321098765432109
+ COMMIT
+ BEGIN
+ table public.toasted_key: UPDATE: old-key: toasted_key[text]:'123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678
+ COMMIT
+ BEGIN
+ table public.toasted_key: DELETE: toasted_key[text]:'123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567
+ COMMIT
+(37 rows)
+
+SELECT pg_drop_replication_slot('regression_slot');
+ pg_drop_replication_slot
+--------------------------
+
+(1 row)
+
--- /dev/null
+wal_level = logical
+max_replication_slots = 4
--- /dev/null
+setup
+{
+ DROP TABLE IF EXISTS tbl1;
+ DROP TABLE IF EXISTS tbl2;
+ CREATE TABLE tbl1(val1 integer, val2 integer);
+ CREATE TABLE tbl2(val1 integer, val2 integer);
+}
+
+teardown
+{
+ DROP TABLE tbl1;
+ DROP TABLE tbl2;
+ SELECT 'stop' FROM pg_drop_replication_slot('isolation_slot');
+}
+
+session "s1"
+step "s1_init" { SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding'); }
+step "s1_begin" { BEGIN; }
+step "s1_insert_tbl1" { INSERT INTO tbl1 (val1, val2) VALUES (1, 1); }
+step "s1_insert_tbl1_3col" { INSERT INTO tbl1 (val1, val2, val3) VALUES (1, 1, 1); }
+step "s1_insert_tbl2" { INSERT INTO tbl2 (val1, val2) VALUES (1, 1); }
+step "s1_insert_tbl2_3col" { INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1); }
+step "s1_commit" { COMMIT; }
+
+session "s2"
+step "s2_alter_tbl1_float" { ALTER TABLE tbl1 ALTER COLUMN val2 TYPE float; }
+step "s2_alter_tbl1_char" { ALTER TABLE tbl1 ALTER COLUMN val2 TYPE character varying; }
+step "s2_alter_tbl1_text" { ALTER TABLE tbl1 ALTER COLUMN val2 TYPE text; }
+step "s2_alter_tbl1_boolean" { ALTER TABLE tbl1 ALTER COLUMN val2 TYPE boolean; }
+
+step "s2_alter_tbl1_add_int" { ALTER TABLE tbl1 ADD COLUMN val3 INTEGER; }
+step "s2_alter_tbl1_add_float" { ALTER TABLE tbl1 ADD COLUMN val3 FLOAT; }
+step "s2_alter_tbl1_add_char" { ALTER TABLE tbl1 ADD COLUMN val3 character varying; }
+step "s2_alter_tbl1_add_boolean" { ALTER TABLE tbl1 ADD COLUMN val3 BOOLEAN; }
+step "s2_alter_tbl1_add_text" { ALTER TABLE tbl1 ADD COLUMN val3 TEXT; }
+
+step "s2_alter_tbl2_float" { ALTER TABLE tbl2 ALTER COLUMN val2 TYPE float; }
+step "s2_alter_tbl2_char" { ALTER TABLE tbl2 ALTER COLUMN val2 TYPE character varying; }
+step "s2_alter_tbl2_text" { ALTER TABLE tbl2 ALTER COLUMN val2 TYPE text; }
+step "s2_alter_tbl2_boolean" { ALTER TABLE tbl2 ALTER COLUMN val2 TYPE boolean; }
+step "s2_alter_tbl2_text" { ALTER TABLE tbl2 ALTER COLUMN val2 TYPE boolean; }
+
+step "s2_alter_tbl2_add_int" { ALTER TABLE tbl2 ADD COLUMN val3 INTEGER; }
+step "s2_alter_tbl2_add_float" { ALTER TABLE tbl2 ADD COLUMN val3 FLOAT; }
+step "s2_alter_tbl2_add_char" { ALTER TABLE tbl2 ADD COLUMN val3 character varying; }
+step "s2_alter_tbl2_add_boolean" { ALTER TABLE tbl2 ADD COLUMN val3 BOOLEAN; }
+step "s2_alter_tbl2_add_text" { ALTER TABLE tbl2 ADD COLUMN val3 TEXT; }
+step "s2_alter_tbl2_drop_3rd_col" { ALTER TABLE tbl2 DROP COLUMN val3; }
+step "s2_alter_tbl2_3rd_char" { ALTER TABLE tbl2 ALTER COLUMN val3 TYPE character varying; }
+step "s2_alter_tbl2_3rd_text" { ALTER TABLE tbl2 ALTER COLUMN val3 TYPE text; }
+step "s2_alter_tbl2_3rd_int" { ALTER TABLE tbl2 ALTER COLUMN val3 TYPE int USING val3::integer; }
+
+step "s2_get_changes" { SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0'); }
+
+
+
+permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_float" "s1_insert_tbl2" "s1_commit" "s2_get_changes"
+permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl1_float" "s1_insert_tbl2" "s1_commit" "s2_get_changes"
+permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_char" "s1_insert_tbl2" "s1_commit" "s2_get_changes"
+permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl1_char" "s1_insert_tbl2" "s1_commit" "s2_get_changes"
+
+permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s1_insert_tbl2" "s2_alter_tbl1_float" "s1_commit" "s2_get_changes"
+permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s1_insert_tbl2" "s2_alter_tbl1_char" "s1_commit" "s2_get_changes"
+
+permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_float" "s1_insert_tbl2" "s2_alter_tbl1_float" "s1_commit" "s2_get_changes"
+permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_char" "s1_insert_tbl2" "s2_alter_tbl1_char" "s1_commit" "s2_get_changes"
+
+permutation "s1_init" "s2_alter_tbl2_char" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_text" "s1_insert_tbl2" "s1_commit" "s2_get_changes"
+permutation "s1_init" "s2_alter_tbl2_char" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_text" "s1_insert_tbl2" "s2_alter_tbl1_char" "s1_commit" "s2_get_changes"
+
+permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_boolean" "s1_insert_tbl2" "s1_commit" "s2_get_changes"
+permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_boolean" "s1_insert_tbl2" "s2_alter_tbl1_boolean" "s1_commit" "s2_get_changes"
+
+permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_add_int" "s1_insert_tbl2_3col" "s1_commit" "s2_get_changes"
+permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s1_insert_tbl2" "s1_commit" "s1_begin" "s2_alter_tbl2_add_int" "s1_insert_tbl2_3col" "s1_commit" "s2_get_changes"
+
+permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_add_float" "s1_insert_tbl2_3col" "s1_commit" "s2_get_changes"
+permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s1_insert_tbl2" "s1_commit" "s1_begin" "s2_alter_tbl2_add_float" "s1_insert_tbl2_3col" "s1_commit" "s2_get_changes"
+
+permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_add_char" "s1_insert_tbl2_3col" "s1_commit" "s2_get_changes"
+permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s1_insert_tbl2" "s1_commit" "s1_begin" "s2_alter_tbl2_add_char" "s1_insert_tbl2_3col" "s1_commit" "s2_get_changes"
+
+permutation "s1_init" "s2_alter_tbl2_add_int" "s1_begin" "s1_insert_tbl2_3col" "s2_alter_tbl2_drop_3rd_col" "s1_commit" "s2_get_changes"
+permutation "s1_init" "s2_alter_tbl2_add_int" "s1_begin" "s1_insert_tbl2_3col" "s2_alter_tbl2_drop_3rd_col" "s1_insert_tbl2" "s1_commit" "s1_insert_tbl2" "s2_get_changes"
+
+permutation "s1_init" "s2_alter_tbl2_add_int" "s1_begin" "s1_insert_tbl2_3col" "s2_alter_tbl2_drop_3rd_col" "s1_commit" "s2_get_changes" "s2_alter_tbl2_add_text" "s1_begin" "s1_insert_tbl2_3col" "s2_alter_tbl2_3rd_char" "s1_insert_tbl2_3col" "s1_commit" "s2_get_changes" "s2_alter_tbl2_3rd_int" "s1_insert_tbl2_3col" "s2_get_changes"
+
+permutation "s1_init" "s2_alter_tbl2_add_char" "s1_begin" "s1_insert_tbl1" "s1_insert_tbl2_3col" "s2_alter_tbl2_3rd_text" "s1_insert_tbl2_3col" "s1_commit" "s1_insert_tbl2_3col" "s2_get_changes"
+permutation "s1_init" "s2_alter_tbl2_add_text" "s1_begin" "s1_insert_tbl1" "s1_insert_tbl2_3col" "s2_alter_tbl2_3rd_char" "s1_insert_tbl2_3col" "s1_commit" "s1_insert_tbl2_3col" "s2_get_changes"
+
+permutation "s1_init" "s2_alter_tbl2_add_char" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_3rd_text" "s1_insert_tbl2_3col" "s1_commit" "s2_alter_tbl2_drop_3rd_col" "s1_insert_tbl2" "s2_get_changes"
+permutation "s1_init" "s2_alter_tbl2_add_text" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_3rd_char" "s1_insert_tbl2_3col" "s1_commit" "s2_alter_tbl2_drop_3rd_col" "s1_insert_tbl2" "s2_get_changes"
+
+permutation "s1_init" "s2_alter_tbl2_add_char" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_drop_3rd_col" "s1_insert_tbl1" "s1_commit" "s2_get_changes"
--- /dev/null
+setup
+{
+ DROP TABLE IF EXISTS do_write;
+ CREATE TABLE do_write(id serial primary key);
+}
+
+teardown
+{
+ DROP TABLE do_write;
+ SELECT 'stop' FROM pg_drop_replication_slot('isolation_slot');
+}
+
+session "s1"
+setup { SET synchronous_commit=on; }
+step "s1b" { BEGIN ISOLATION LEVEL SERIALIZABLE; }
+step "s1w" { INSERT INTO do_write DEFAULT VALUES; }
+step "s1c" { COMMIT; }
+session "s2"
+setup { SET synchronous_commit=on; }
+step "s2init" {SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');}
+step "s2start" {SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');}
+
+
+permutation "s1b" "s1w" "s2init" "s1c" "s2start" "s1b" "s1w" "s1c" "s2start" "s1b" "s1w" "s2start" "s1c" "s2start"
--- /dev/null
+setup
+{
+ DROP TABLE IF EXISTS do_write;
+ CREATE TABLE do_write(id serial primary key);
+}
+
+teardown
+{
+ DROP TABLE IF EXISTS do_write;
+ SELECT 'stop' FROM pg_drop_replication_slot('isolation_slot');
+}
+
+session "s0"
+setup { SET synchronous_commit=on; }
+step "s0init" {SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');}
+step "s0start" {SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');}
+step "s0alter" {ALTER TABLE do_write ADD column ts timestamptz; }
+step "s0w" { INSERT INTO do_write DEFAULT VALUES; }
+
+session "s1"
+setup { SET synchronous_commit=on; }
+step "s1begin" {BEGIN;}
+step "s1sharepgclass" { SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR SHARE) s; }
+step "s1keysharepgclass" { SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR KEY SHARE) s; }
+step "s1commit" {COMMIT;}
+
+session "s2"
+setup { SET synchronous_commit=on; }
+step "s2begin" {BEGIN;}
+step "s2sharepgclass" { SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR SHARE) s; }
+step "s2keysharepgclass" { SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR KEY SHARE) s; }
+step "s2commit" {COMMIT;}
+
+# test that we're handling an update-only mxact xmax correctly
+permutation "s0init" "s0start" "s1begin" "s1sharepgclass" "s2begin" "s2sharepgclass" "s0w" "s0start" "s2commit" "s1commit"
+
+# test that we're handling an update-only mxact xmax correctly
+permutation "s0init" "s0start" "s1begin" "s1keysharepgclass" "s2begin" "s2keysharepgclass" "s0alter" "s0w" "s0start" "s2commit" "s1commit"
--- /dev/null
+-- predictability
+SET synchronous_commit = on;
+
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+-- succeeds, textual plugin, textual consumer
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'force-binary', '0');
+-- fails, binary plugin, textual consumer
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'force-binary', '1');
+-- succeeds, textual plugin, binary consumer
+SELECT data FROM pg_logical_slot_get_binary_changes('regression_slot', NULL, NULL, 'force-binary', '0');
+-- succeeds, binary plugin, binary consumer
+SELECT data FROM pg_logical_slot_get_binary_changes('regression_slot', NULL, NULL, 'force-binary', '1');
+
+SELECT 'init' FROM pg_drop_replication_slot('regression_slot');
--- /dev/null
+-- predictability
+SET synchronous_commit = on;
+
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+-- fail because of an already existing slot
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+-- fail because of an invalid name
+SELECT 'init' FROM pg_create_logical_replication_slot('Invalid Name', 'test_decoding');
+
+-- fail twice because of an invalid parameter values
+SELECT 'init' FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', 'frakbar');
+SELECT 'init' FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'nonexistant-option', 'frakbar');
+SELECT 'init' FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', 'frakbar');
+
+-- succeed once
+SELECT pg_drop_replication_slot('regression_slot');
+-- fail
+SELECT pg_drop_replication_slot('regression_slot');
+
+-- check that we're detecting a streaming rep slot used for logical decoding
+SELECT 'init' FROM pg_create_physical_replication_slot('repl');
+SELECT data FROM pg_logical_slot_get_changes('repl', NULL, NULL, 'include-xids', '0');
+SELECT pg_drop_replication_slot('repl');
+
+
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+
+/* check whether status function reports us, only reproduceable columns */
+SELECT slot_name, plugin, slot_type, active,
+ NOT catalog_xmin IS NULL AS catalog_xmin_set,
+ xmin IS NULl AS data_xmin_not_set,
+ pg_xlog_location_diff(restart_lsn, '0/01000000') > 0 AS some_wal
+FROM pg_replication_slots;
+
+/*
+ * Check that changes are handled correctly when interleaved with ddl
+ */
+CREATE TABLE replication_example(id SERIAL PRIMARY KEY, somedata int, text varchar(120));
+BEGIN;
+INSERT INTO replication_example(somedata, text) VALUES (1, 1);
+INSERT INTO replication_example(somedata, text) VALUES (1, 2);
+COMMIT;
+
+ALTER TABLE replication_example ADD COLUMN bar int;
+
+INSERT INTO replication_example(somedata, text, bar) VALUES (2, 1, 4);
+
+BEGIN;
+INSERT INTO replication_example(somedata, text, bar) VALUES (2, 2, 4);
+INSERT INTO replication_example(somedata, text, bar) VALUES (2, 3, 4);
+INSERT INTO replication_example(somedata, text, bar) VALUES (2, 4, NULL);
+COMMIT;
+
+ALTER TABLE replication_example DROP COLUMN bar;
+INSERT INTO replication_example(somedata, text) VALUES (3, 1);
+
+BEGIN;
+INSERT INTO replication_example(somedata, text) VALUES (3, 2);
+INSERT INTO replication_example(somedata, text) VALUES (3, 3);
+COMMIT;
+
+ALTER TABLE replication_example RENAME COLUMN text TO somenum;
+
+INSERT INTO replication_example(somedata, somenum) VALUES (4, 1);
+
+-- collect all changes
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+
+ALTER TABLE replication_example ALTER COLUMN somenum TYPE int4 USING (somenum::int4);
+-- throw away changes, they contain oids
+SELECT count(data) FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+
+INSERT INTO replication_example(somedata, somenum) VALUES (5, 1);
+
+BEGIN;
+INSERT INTO replication_example(somedata, somenum) VALUES (6, 1);
+ALTER TABLE replication_example ADD COLUMN zaphod1 int;
+INSERT INTO replication_example(somedata, somenum, zaphod1) VALUES (6, 2, 1);
+ALTER TABLE replication_example ADD COLUMN zaphod2 int;
+INSERT INTO replication_example(somedata, somenum, zaphod2) VALUES (6, 3, 1);
+INSERT INTO replication_example(somedata, somenum, zaphod1) VALUES (6, 4, 2);
+COMMIT;
+
+-- show changes
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+
+-- hide changes bc of oid visible in full table rewrites
+CREATE TABLE tr_unique(id2 serial unique NOT NULL, data int);
+INSERT INTO tr_unique(data) VALUES(10);
+ALTER TABLE tr_unique RENAME TO tr_pkey;
+ALTER TABLE tr_pkey ADD COLUMN id serial primary key;
+SELECT count(data) FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+
+INSERT INTO tr_pkey(data) VALUES(1);
+--show deletion with primary key
+DELETE FROM tr_pkey;
+
+/* display results */
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+
+/*
+ * check that disk spooling works
+ */
+BEGIN;
+CREATE TABLE tr_etoomuch (id serial primary key, data int);
+INSERT INTO tr_etoomuch(data) SELECT g.i FROM generate_series(1, 10234) g(i);
+DELETE FROM tr_etoomuch WHERE id < 5000;
+UPDATE tr_etoomuch SET data = - data WHERE id > 5000;
+COMMIT;
+
+/* display results, but hide most of the output */
+SELECT count(*), min(data), max(data)
+FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0')
+GROUP BY substring(data, 1, 24)
+ORDER BY 1;
+
+/*
+ * check whether we decode subtransactions correctly in relation with each
+ * other
+ */
+CREATE TABLE tr_sub (id serial primary key, path text);
+
+-- toplevel, subtxn, toplevel, subtxn, subtxn
+BEGIN;
+INSERT INTO tr_sub(path) VALUES ('1-top-#1');
+
+SAVEPOINT a;
+INSERT INTO tr_sub(path) VALUES ('1-top-1-#1');
+INSERT INTO tr_sub(path) VALUES ('1-top-1-#2');
+RELEASE SAVEPOINT a;
+
+SAVEPOINT b;
+SAVEPOINT c;
+INSERT INTO tr_sub(path) VALUES ('1-top-2-1-#1');
+INSERT INTO tr_sub(path) VALUES ('1-top-2-1-#2');
+RELEASE SAVEPOINT c;
+INSERT INTO tr_sub(path) VALUES ('1-top-2-#1');
+RELEASE SAVEPOINT b;
+COMMIT;
+
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+
+-- check that we handle xlog assignments correctly
+BEGIN;
+-- nest 80 subtxns
+SAVEPOINT subtop;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
+-- assign xid by inserting
+INSERT INTO tr_sub(path) VALUES ('2-top-1...--#1');
+INSERT INTO tr_sub(path) VALUES ('2-top-1...--#2');
+INSERT INTO tr_sub(path) VALUES ('2-top-1...--#3');
+RELEASE SAVEPOINT subtop;
+INSERT INTO tr_sub(path) VALUES ('2-top-#1');
+COMMIT;
+
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+
+-- make sure rollbacked subtransactions aren't decoded
+BEGIN;
+INSERT INTO tr_sub(path) VALUES ('3-top-2-#1');
+SAVEPOINT a;
+INSERT INTO tr_sub(path) VALUES ('3-top-2-1-#1');
+SAVEPOINT b;
+INSERT INTO tr_sub(path) VALUES ('3-top-2-2-#1');
+ROLLBACK TO SAVEPOINT b;
+INSERT INTO tr_sub(path) VALUES ('3-top-2-#2');
+COMMIT;
+
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+
+-- test whether a known, but not yet logged toplevel xact, followed by a
+-- subxact commit is handled correctly
+BEGIN;
+SELECT txid_current() != 0; -- so no fixed xid apears in the outfile
+SAVEPOINT a;
+INSERT INTO tr_sub(path) VALUES ('4-top-1-#1');
+RELEASE SAVEPOINT a;
+COMMIT;
+
+-- test whether a change in a subtransaction, in an unknown toplevel
+-- xact is handled correctly.
+BEGIN;
+SAVEPOINT a;
+INSERT INTO tr_sub(path) VALUES ('5-top-1-#1');
+COMMIT;
+
+
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+
+
+/*
+ * Check whether treating a table as a catalog table works somewhat
+ */
+CREATE TABLE replication_metadata (
+ id serial primary key,
+ relation name NOT NULL,
+ options text[]
+)
+WITH (user_catalog_table = true)
+;
+\d+ replication_metadata
+
+INSERT INTO replication_metadata(relation, options)
+VALUES ('foo', ARRAY['a', 'b']);
+
+ALTER TABLE replication_metadata RESET (user_catalog_table);
+\d+ replication_metadata
+
+INSERT INTO replication_metadata(relation, options)
+VALUES ('bar', ARRAY['a', 'b']);
+
+ALTER TABLE replication_metadata SET (user_catalog_table = true);
+\d+ replication_metadata
+
+INSERT INTO replication_metadata(relation, options)
+VALUES ('blub', NULL);
+
+-- make sure rewrites don't work
+ALTER TABLE replication_metadata ADD COLUMN rewritemeornot int;
+ALTER TABLE replication_metadata ALTER COLUMN rewritemeornot TYPE text;
+
+ALTER TABLE replication_metadata SET (user_catalog_table = false);
+\d+ replication_metadata
+
+INSERT INTO replication_metadata(relation, options)
+VALUES ('zaphod', NULL);
+
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+
+/*
+ * check whether we handle updates/deletes correct with & without a pkey
+ */
+
+/* we should handle the case without a key at all more gracefully */
+CREATE TABLE table_without_key(id serial, data int);
+INSERT INTO table_without_key(data) VALUES(1),(2);
+DELETE FROM table_without_key WHERE data = 1;
+-- won't log old keys
+UPDATE table_without_key SET data = 3 WHERE data = 2;
+UPDATE table_without_key SET id = -id;
+UPDATE table_without_key SET id = -id;
+-- should log the full old row now
+ALTER TABLE table_without_key REPLICA IDENTITY FULL;
+UPDATE table_without_key SET data = 3 WHERE data = 2;
+UPDATE table_without_key SET id = -id;
+UPDATE table_without_key SET id = -id;
+DELETE FROM table_without_key WHERE data = 3;
+
+CREATE TABLE table_with_pkey(id serial primary key, data int);
+INSERT INTO table_with_pkey(data) VALUES(1), (2);
+DELETE FROM table_with_pkey WHERE data = 1;
+-- should log the old pkey
+UPDATE table_with_pkey SET data = 3 WHERE data = 2;
+UPDATE table_with_pkey SET id = -id;
+UPDATE table_with_pkey SET id = -id;
+-- check that we log nothing despite having a pkey
+ALTER TABLE table_without_key REPLICA IDENTITY NOTHING;
+UPDATE table_with_pkey SET id = -id;
+-- check that we log everything despite having a pkey
+ALTER TABLE table_without_key REPLICA IDENTITY FULL;
+UPDATE table_with_pkey SET id = -id;
+DELETE FROM table_with_pkey WHERE data = 3;
+
+CREATE TABLE table_with_unique_not_null(id serial unique, data int);
+ALTER TABLE table_with_unique_not_null ALTER COLUMN id SET NOT NULL; --already set
+-- won't log anything, replica identity not setup
+INSERT INTO table_with_unique_not_null(data) VALUES(1), (2);
+DELETE FROM table_with_unique_not_null WHERE data = 1;
+UPDATE table_with_unique_not_null SET data = 3 WHERE data = 2;
+UPDATE table_with_unique_not_null SET id = -id;
+UPDATE table_with_unique_not_null SET id = -id;
+DELETE FROM table_with_unique_not_null WHERE data = 3;
+-- should log old key
+ALTER TABLE table_with_unique_not_null REPLICA IDENTITY USING INDEX table_with_unique_not_null_id_key;
+INSERT INTO table_with_unique_not_null(data) VALUES(1), (2);
+DELETE FROM table_with_unique_not_null WHERE data = 1;
+UPDATE table_with_unique_not_null SET data = 3 WHERE data = 2;
+UPDATE table_with_unique_not_null SET id = -id;
+UPDATE table_with_unique_not_null SET id = -id;
+DELETE FROM table_with_unique_not_null WHERE data = 3;
+
+-- check toast support
+BEGIN;
+CREATE SEQUENCE toasttable_rand_seq START 79 INCREMENT 1499; -- portable "random"
+CREATE TABLE toasttable(
+ id serial primary key,
+ toasted_col1 text,
+ rand1 float8 DEFAULT nextval('toasttable_rand_seq'),
+ toasted_col2 text,
+ rand2 float8 DEFAULT nextval('toasttable_rand_seq')
+ );
+COMMIT;
+-- uncompressed external toast data
+INSERT INTO toasttable(toasted_col1) SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i);
+
+-- compressed external toast data
+INSERT INTO toasttable(toasted_col2) SELECT repeat(string_agg(to_char(g.i, 'FM0000'), ''), 50) FROM generate_series(1, 500) g(i);
+
+-- update of existing column
+UPDATE toasttable
+ SET toasted_col1 = (SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i))
+WHERE id = 1;
+
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+
+INSERT INTO toasttable(toasted_col1) SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i);
+
+-- update of second column, first column unchanged
+UPDATE toasttable
+ SET toasted_col2 = (SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i))
+WHERE id = 1;
+
+-- make sure we decode correctly even if the toast table is gone
+DROP TABLE toasttable;
+
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+
+-- done, free logical replication slot
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+SELECT pg_drop_replication_slot('regression_slot');
+
+/* check that we aren't visible anymore now */
+SELECT * FROM pg_stat_replication;
--- /dev/null
+-- predictability
+SET synchronous_commit = on;
+
+-- fail because we're creating a slot while in an xact with xid
+BEGIN;
+SELECT txid_current() = 0;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ROLLBACK;
+
+-- fail because we're creating a slot while in an subxact whose topxact has a xid
+BEGIN;
+SELECT txid_current() = 0;
+SAVEPOINT barf;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ROLLBACK TO SAVEPOINT barf;
+ROLLBACK;
+
+-- succeed, outside tx.
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+SELECT 'stop' FROM pg_drop_replication_slot('regression_slot');
+
+-- succeed, in tx without xid.
+BEGIN;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+COMMIT;
+
+CREATE TABLE nobarf(id serial primary key, data text);
+INSERT INTO nobarf(data) VALUES('1');
+
+-- decoding works in transaction with xid
+BEGIN;
+SELECT txid_current() = 0;
+-- don't show yet, haven't committed
+INSERT INTO nobarf(data) VALUES('2');
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+COMMIT;
+
+INSERT INTO nobarf(data) VALUES('3');
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+
+SELECT 'stop' FROM pg_drop_replication_slot('regression_slot');
--- /dev/null
+-- predictability
+SET synchronous_commit = on;
+
+-- setup
+CREATE ROLE lr_normal;
+CREATE ROLE lr_superuser SUPERUSER;
+CREATE ROLE lr_replication REPLICATION;
+CREATE TABLE lr_test(data text);
+
+-- superuser can control replication
+SET ROLE lr_superuser;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+INSERT INTO lr_test VALUES('lr_superuser_init');
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+SELECT pg_drop_replication_slot('regression_slot');
+RESET ROLE;
+
+-- replication user can control replication
+SET ROLE lr_replication;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+INSERT INTO lr_test VALUES('lr_superuser_init');
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+SELECT pg_drop_replication_slot('regression_slot');
+RESET ROLE;
+
+-- plain user *can't* can control replication
+SET ROLE lr_normal;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+INSERT INTO lr_test VALUES('lr_superuser_init');
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+SELECT pg_drop_replication_slot('regression_slot');
+RESET ROLE;
+
+-- replication users can drop superuser created slots
+SET ROLE lr_superuser;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+RESET ROLE;
+SET ROLE lr_replication;
+SELECT pg_drop_replication_slot('regression_slot');
+RESET ROLE;
+
+-- normal users can't drop existing slots
+SET ROLE lr_superuser;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+RESET ROLE;
+SET ROLE lr_normal;
+SELECT pg_drop_replication_slot('regression_slot');
+RESET ROLE;
+
+-- all users can see existing slots
+SET ROLE lr_superuser;
+SELECT slot_name, plugin FROM pg_replication_slots;
+RESET ROLE;
+
+SET ROLE lr_replication;
+SELECT slot_name, plugin FROM pg_replication_slots;
+RESET ROLE;
+
+SET ROLE lr_normal;
+SELECT slot_name, plugin FROM pg_replication_slots;
+RESET ROLE;
+
+-- cleanup
+SELECT pg_drop_replication_slot('regression_slot');
+
+DROP ROLE lr_normal;
+DROP ROLE lr_superuser;
+DROP ROLE lr_replication;
+DROP TABLE lr_test;
--- /dev/null
+-- predictability
+SET synchronous_commit = on;
+
+DROP TABLE IF EXISTS replication_example;
+
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+CREATE TABLE replication_example(id SERIAL PRIMARY KEY, somedata int, text varchar(120));
+INSERT INTO replication_example(somedata) VALUES (1);
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+
+BEGIN;
+INSERT INTO replication_example(somedata) VALUES (2);
+ALTER TABLE replication_example ADD COLUMN testcolumn1 int;
+INSERT INTO replication_example(somedata, testcolumn1) VALUES (3, 1);
+COMMIT;
+
+BEGIN;
+INSERT INTO replication_example(somedata) VALUES (3);
+ALTER TABLE replication_example ADD COLUMN testcolumn2 int;
+INSERT INTO replication_example(somedata, testcolumn1, testcolumn2) VALUES (4, 2, 1);
+COMMIT;
+
+VACUUM FULL pg_am;
+VACUUM FULL pg_amop;
+VACUUM FULL pg_proc;
+VACUUM FULL pg_opclass;
+VACUUM FULL pg_type;
+VACUUM FULL pg_index;
+VACUUM FULL pg_database;
+
+-- repeated rewrites that fail
+BEGIN;
+CLUSTER pg_class USING pg_class_oid_index;
+CLUSTER pg_class USING pg_class_oid_index;
+ROLLBACK;
+
+-- repeated rewrites that succeed
+BEGIN;
+CLUSTER pg_class USING pg_class_oid_index;
+CLUSTER pg_class USING pg_class_oid_index;
+CLUSTER pg_class USING pg_class_oid_index;
+COMMIT;
+
+ -- repeated rewrites in different transactions
+VACUUM FULL pg_class;
+VACUUM FULL pg_class;
+
+INSERT INTO replication_example(somedata, testcolumn1) VALUES (5, 3);
+
+BEGIN;
+INSERT INTO replication_example(somedata, testcolumn1) VALUES (6, 4);
+ALTER TABLE replication_example ADD COLUMN testcolumn3 int;
+INSERT INTO replication_example(somedata, testcolumn1, testcolumn3) VALUES (7, 5, 1);
+COMMIT;
+
+-- make old files go away
+CHECKPOINT;
+
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+SELECT pg_drop_replication_slot('regression_slot');
+
+DROP TABLE IF EXISTS replication_example;
--- /dev/null
+-- predictability
+SET synchronous_commit = on;
+
+DROP TABLE IF EXISTS xpto;
+
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+
+CREATE SEQUENCE xpto_rand_seq START 79 INCREMENT 1499; -- portable "random"
+CREATE TABLE xpto (
+ id serial primary key,
+ toasted_col1 text,
+ rand1 float8 DEFAULT nextval('xpto_rand_seq'),
+ toasted_col2 text,
+ rand2 float8 DEFAULT nextval('xpto_rand_seq')
+);
+
+-- uncompressed external toast data
+INSERT INTO xpto (toasted_col1, toasted_col2) SELECT string_agg(g.i::text, ''), string_agg((g.i*2)::text, '') FROM generate_series(1, 2000) g(i);
+
+-- compressed external toast data
+INSERT INTO xpto (toasted_col2) SELECT repeat(string_agg(to_char(g.i, 'FM0000'), ''), 50) FROM generate_series(1, 500) g(i);
+
+-- update of existing column
+UPDATE xpto SET toasted_col1 = (SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i)) WHERE id = 1;
+
+UPDATE xpto SET rand1 = 123.456 WHERE id = 1;
+
+DELETE FROM xpto WHERE id = 1;
+
+DROP TABLE IF EXISTS toasted_key;
+CREATE TABLE toasted_key (
+ id serial,
+ toasted_key text PRIMARY KEY,
+ toasted_col1 text,
+ toasted_col2 text
+);
+
+ALTER TABLE toasted_key ALTER COLUMN toasted_key SET STORAGE EXTERNAL;
+ALTER TABLE toasted_key ALTER COLUMN toasted_col1 SET STORAGE EXTERNAL;
+
+INSERT INTO toasted_key(toasted_key, toasted_col1) VALUES(repeat('1234567890', 200), repeat('9876543210', 200));
+
+-- test update of a toasted key without changing it
+UPDATE toasted_key SET toasted_col2 = toasted_col1;
+-- test update of a toasted key, changing it
+UPDATE toasted_key SET toasted_key = toasted_key || '1';
+
+DELETE FROM toasted_key;
+
+SELECT substr(data, 1, 200) FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+SELECT pg_drop_replication_slot('regression_slot');
--- /dev/null
+/*-------------------------------------------------------------------------
+ *
+ * test_decoding.c
+ * example logical decoding output plugin
+ *
+ * Copyright (c) 2012-2014, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ * contrib/test_decoding/test_decoding.c
+ *
+ *-------------------------------------------------------------------------
+ */
+#include "postgres.h"
+
+#include "access/sysattr.h"
+
+#include "catalog/pg_class.h"
+#include "catalog/pg_type.h"
+
+#include "nodes/parsenodes.h"
+
+#include "replication/output_plugin.h"
+#include "replication/logical.h"
+
+#include "utils/builtins.h"
+#include "utils/lsyscache.h"
+#include "utils/memutils.h"
+#include "utils/rel.h"
+#include "utils/relcache.h"
+#include "utils/syscache.h"
+#include "utils/typcache.h"
+
+
+PG_MODULE_MAGIC;
+
+extern void _PG_init(void);
+extern void _PG_output_plugin_init(OutputPluginCallbacks *cb);
+
+typedef struct
+{
+ MemoryContext context;
+ bool include_xids;
+ bool include_timestamp;
+} TestDecodingData;
+
+/* These must be available to pg_dlsym() */
+static void pg_decode_startup(LogicalDecodingContext *ctx, OutputPluginOptions *opt,
+ bool is_init);
+static void pg_decode_shutdown(LogicalDecodingContext *ctx);
+static void pg_decode_begin_txn(LogicalDecodingContext *ctx,
+ ReorderBufferTXN *txn);
+static void pg_decode_commit_txn(LogicalDecodingContext *ctx,
+ ReorderBufferTXN *txn, XLogRecPtr commit_lsn);
+static void pg_decode_change(LogicalDecodingContext *ctx,
+ ReorderBufferTXN *txn, Relation rel,
+ ReorderBufferChange *change);
+
+void
+_PG_init(void)
+{
+ /* other plugins can perform things here */
+}
+
+/* specify output plugin callbacks */
+void
+_PG_output_plugin_init(OutputPluginCallbacks *cb)
+{
+ AssertVariableIsOfType(&_PG_output_plugin_init, LogicalOutputPluginInit);
+
+ cb->startup_cb = pg_decode_startup;
+ cb->begin_cb = pg_decode_begin_txn;
+ cb->change_cb = pg_decode_change;
+ cb->commit_cb = pg_decode_commit_txn;
+ cb->shutdown_cb = pg_decode_shutdown;
+}
+
+
+/* initialize this plugin */
+static void
+pg_decode_startup(LogicalDecodingContext *ctx, OutputPluginOptions *opt,
+ bool is_init)
+{
+ ListCell *option;
+ TestDecodingData *data;
+
+ data = palloc(sizeof(TestDecodingData));
+ data->context = AllocSetContextCreate(ctx->context,
+ "text conversion context",
+ ALLOCSET_DEFAULT_MINSIZE,
+ ALLOCSET_DEFAULT_INITSIZE,
+ ALLOCSET_DEFAULT_MAXSIZE);
+ data->include_xids = true;
+ data->include_timestamp = false;
+
+ ctx->output_plugin_private = data;
+
+ opt->output_type = OUTPUT_PLUGIN_TEXTUAL_OUTPUT;
+
+ foreach(option, ctx->output_plugin_options)
+ {
+ DefElem *elem = lfirst(option);
+
+ Assert(elem->arg == NULL || IsA(elem->arg, String));
+
+ if (strcmp(elem->defname, "include-xids") == 0)
+ {
+ /* if option does not provide a value, it means its value is true */
+ if (elem->arg == NULL)
+ data->include_xids = true;
+ else if (!parse_bool(strVal(elem->arg), &data->include_xids))
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("could not parse value \"%s\" for parameter \"%s\"",
+ strVal(elem->arg), elem->defname)));
+ }
+ else if (strcmp(elem->defname, "include-timestamp") == 0)
+ {
+ if (elem->arg == NULL)
+ data->include_timestamp = true;
+ else if (!parse_bool(strVal(elem->arg), &data->include_timestamp))
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("could not parse value \"%s\" for parameter \"%s\"",
+ strVal(elem->arg), elem->defname)));
+ }
+ else if (strcmp(elem->defname, "force-binary") == 0)
+ {
+ bool force_binary;
+
+ if (elem->arg == NULL)
+ continue;
+ else if (!parse_bool(strVal(elem->arg), &force_binary))
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("could not parse value \"%s\" for parameter \"%s\"",
+ strVal(elem->arg), elem->defname)));
+
+ if (force_binary)
+ opt->output_type = OUTPUT_PLUGIN_BINARY_OUTPUT;
+ }
+ else
+ {
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("option \"%s\" = \"%s\" is unknown",
+ elem->defname,
+ elem->arg ? strVal(elem->arg) : "(null)")));
+ }
+ }
+}
+
+/* cleanup this plugin's resources */
+static void
+pg_decode_shutdown(LogicalDecodingContext *ctx)
+{
+ TestDecodingData *data = ctx->output_plugin_private;
+
+ /* cleanup our own resources via memory context reset */
+ MemoryContextDelete(data->context);
+}
+
+/* BEGIN callback */
+static void
+pg_decode_begin_txn(LogicalDecodingContext *ctx, ReorderBufferTXN *txn)
+{
+ TestDecodingData *data = ctx->output_plugin_private;
+
+ OutputPluginPrepareWrite(ctx, true);
+ if (data->include_xids)
+ appendStringInfo(ctx->out, "BEGIN %u", txn->xid);
+ else
+ appendStringInfoString(ctx->out, "BEGIN");
+ OutputPluginWrite(ctx, true);
+}
+
+/* COMMIT callback */
+static void
+pg_decode_commit_txn(LogicalDecodingContext *ctx, ReorderBufferTXN *txn,
+ XLogRecPtr commit_lsn)
+{
+ TestDecodingData *data = ctx->output_plugin_private;
+
+ OutputPluginPrepareWrite(ctx, true);
+ if (data->include_xids)
+ appendStringInfo(ctx->out, "COMMIT %u", txn->xid);
+ else
+ appendStringInfoString(ctx->out, "COMMIT");
+
+ if (data->include_timestamp)
+ appendStringInfo(ctx->out, " (at %s)",
+ timestamptz_to_str(txn->commit_time));
+
+ OutputPluginWrite(ctx, true);
+}
+
+/*
+ * Print literal `outputstr' already represented as string of type `typid'
+ * into stringbuf `s'.
+ *
+ * Some builtin types aren't quoted, the rest is quoted. Escaping is done as
+ * if standard_conforming_strings were enabled.
+ */
+static void
+print_literal(StringInfo s, Oid typid, char *outputstr)
+{
+ const char *valptr;
+
+ switch (typid)
+ {
+ case INT2OID:
+ case INT4OID:
+ case INT8OID:
+ case OIDOID:
+ case FLOAT4OID:
+ case FLOAT8OID:
+ case NUMERICOID:
+ /* NB: We don't care about Inf, NaN et al. */
+ appendStringInfoString(s, outputstr);
+ break;
+
+ case BITOID:
+ case VARBITOID:
+ appendStringInfo(s, "B'%s'", outputstr);
+ break;
+
+ case BOOLOID:
+ if (strcmp(outputstr, "t") == 0)
+ appendStringInfoString(s, "true");
+ else
+ appendStringInfoString(s, "false");
+ break;
+
+ default:
+ appendStringInfoChar(s, '\'');
+ for (valptr = outputstr; *valptr; valptr++)
+ {
+ char ch = *valptr;
+
+ if (SQL_STR_DOUBLE(ch, false))
+ appendStringInfoChar(s, ch);
+ appendStringInfoChar(s, ch);
+ }
+ appendStringInfoChar(s, '\'');
+ break;
+ }
+}
+
+/* print the tuple 'tuple' into the StringInfo s */
+static void
+tuple_to_stringinfo(StringInfo s, TupleDesc tupdesc, HeapTuple tuple, bool skip_nulls)
+{
+ int natt;
+ Oid oid;
+
+ /* print oid of tuple, it's not included in the TupleDesc */
+ if ((oid = HeapTupleHeaderGetOid(tuple->t_data)) != InvalidOid)
+ {
+ appendStringInfo(s, " oid[oid]:%u", oid);
+ }
+
+ /* print all columns individually */
+ for (natt = 0; natt < tupdesc->natts; natt++)
+ {
+ Form_pg_attribute attr; /* the attribute itself */
+ Oid typid; /* type of current attribute */
+ Oid typoutput; /* output function */
+ bool typisvarlena;
+ Datum origval; /* possibly toasted Datum */
+ bool isnull; /* column is null? */
+
+ attr = tupdesc->attrs[natt];
+
+ /*
+ * don't print dropped columns, we can't be sure everything is
+ * available for them
+ */
+ if (attr->attisdropped)
+ continue;
+
+ /*
+ * Don't print system columns, oid will already have been printed if
+ * present.
+ */
+ if (attr->attnum < 0)
+ continue;
+
+ typid = attr->atttypid;
+
+ /* get Datum from tuple */
+ origval = fastgetattr(tuple, natt + 1, tupdesc, &isnull);
+
+ if (isnull && skip_nulls)
+ continue;
+
+ /* print attribute name */
+ appendStringInfoChar(s, ' ');
+ appendStringInfoString(s, quote_identifier(NameStr(attr->attname)));
+
+ /* print attribute type */
+ appendStringInfoChar(s, '[');
+ appendStringInfoString(s, format_type_be(typid));
+ appendStringInfoChar(s, ']');
+
+ /* query output function */
+ getTypeOutputInfo(typid,
+ &typoutput, &typisvarlena);
+
+ /* print separator */
+ appendStringInfoChar(s, ':');
+
+ /* print data */
+ if (isnull)
+ appendStringInfoString(s, "null");
+ else if (typisvarlena && VARATT_IS_EXTERNAL_ONDISK(origval))
+ appendStringInfoString(s, "unchanged-toast-datum");
+ else if (!typisvarlena)
+ print_literal(s, typid,
+ OidOutputFunctionCall(typoutput, origval));
+ else
+ {
+ Datum val; /* definitely detoasted Datum */
+ val = PointerGetDatum(PG_DETOAST_DATUM(origval));
+ print_literal(s, typid, OidOutputFunctionCall(typoutput, val));
+ }
+ }
+}
+
+/*
+ * callback for individual changed tuples
+ */
+static void
+pg_decode_change(LogicalDecodingContext *ctx, ReorderBufferTXN *txn,
+ Relation relation, ReorderBufferChange *change)
+{
+ TestDecodingData *data;
+ Form_pg_class class_form;
+ TupleDesc tupdesc;
+ MemoryContext old;
+
+ data = ctx->output_plugin_private;
+ class_form = RelationGetForm(relation);
+ tupdesc = RelationGetDescr(relation);
+
+ /* Avoid leaking memory by using and resetting our own context */
+ old = MemoryContextSwitchTo(data->context);
+
+ OutputPluginPrepareWrite(ctx, true);
+
+ appendStringInfoString(ctx->out, "table ");
+ appendStringInfoString(ctx->out,
+ quote_qualified_identifier(
+ get_namespace_name(
+ get_rel_namespace(RelationGetRelid(relation))),
+ NameStr(class_form->relname)));
+ appendStringInfoString(ctx->out, ":");
+
+ switch (change->action)
+ {
+ case REORDER_BUFFER_CHANGE_INSERT:
+ appendStringInfoString(ctx->out, " INSERT:");
+ if (change->tp.newtuple == NULL)
+ appendStringInfoString(ctx->out, " (no-tuple-data)");
+ else
+ tuple_to_stringinfo(ctx->out, tupdesc,
+ &change->tp.newtuple->tuple,
+ false);
+ break;
+ case REORDER_BUFFER_CHANGE_UPDATE:
+ appendStringInfoString(ctx->out, " UPDATE:");
+ if (change->tp.oldtuple != NULL)
+ {
+ appendStringInfoString(ctx->out, " old-key:");
+ tuple_to_stringinfo(ctx->out, tupdesc,
+ &change->tp.oldtuple->tuple,
+ true);
+ appendStringInfoString(ctx->out, " new-tuple:");
+ }
+
+ if (change->tp.newtuple == NULL)
+ appendStringInfoString(ctx->out, " (no-tuple-data)");
+ else
+ tuple_to_stringinfo(ctx->out, tupdesc,
+ &change->tp.newtuple->tuple,
+ false);
+ break;
+ case REORDER_BUFFER_CHANGE_DELETE:
+ appendStringInfoString(ctx->out, " DELETE:");
+
+ /* if there was no PK, we only know that a delete happened */
+ if (change->tp.oldtuple == NULL)
+ appendStringInfoString(ctx->out, " (no-tuple-data)");
+ /* In DELETE, only the replica identity is present; display that */
+ else
+ tuple_to_stringinfo(ctx->out, tupdesc,
+ &change->tp.oldtuple->tuple,
+ true);
+ break;
+ }
+
+ MemoryContextSwitchTo(old);
+ MemoryContextReset(data->context);
+
+ OutputPluginWrite(ctx, true);
+}
&sslinfo;
&tablefunc;
&tcn;
+ &test-decoding;
&test-parser;
&test-shm-mq;
&tsearch2;
--- /dev/null
+
+
+
+
test_decoding
+
+
+
+
+ test_decoding is an example of a logical decoding
+ output plugin. It doesn't do anything especially useful, but can serve as
+ a starting point for developing your own decoder.
+
+
+ test_decoding receives WAL through the logical decoding
+ mechanism and decodes it into text representations of the operations
+ performed.
+
+
+ Typical output from this plugin, used over the SQL logical decoding
+ interface, might be:
+
+postgres=# SELECT * FROM pg_logical_slot_get_changes('test_slot', 'now', 'include-xids', '0');
+ location | xid | data
+-----------+-----+--------------------------------------------------
+ 0/16D30F8 | 691 | BEGIN
+ 0/16D32A0 | 691 | table public.data: INSERT: id[int4]:2 data[text]:'arg'
+ 0/16D32A0 | 691 | table public.data: INSERT: id[int4]:3 data[text]:'demo'
+ 0/16D32A0 | 691 | COMMIT
+ 0/16D32D8 | 692 | BEGIN
+ 0/16D3398 | 692 | table public.data: DELETE: id[int4]:2
+ 0/16D3398 | 692 | table public.data: DELETE: id[int4]:3
+ 0/16D3398 | 692 | COMMIT
+(8 rows)
+
+
+
+
pg_regress_clean_files = results/ regression.diffs regression.out tmp_check/ log/
+pg_isolation_regress_check = $(top_builddir)/src/test/isolation/pg_isolation_regress --inputdir=$(srcdir) --temp-install=./tmp_check --top-builddir=$(top_builddir) $(pg_regress_locale_flags)
+pg_isolation_regress_installcheck = $(top_builddir)/src/test/isolation/pg_isolation_regress --inputdir=$(srcdir) --top-builddir=$(top_builddir) $(pg_regress_locale_flags)
##########################################################################
#
/*
* Prune and repair fragmentation for the whole page, if possible.
*/
- Assert(TransactionIdIsValid(RecentGlobalXmin));
- heap_page_prune_opt(scan->rs_rd, buffer, RecentGlobalXmin);
+ heap_page_prune_opt(scan->rs_rd, buffer);
/*
* We must hold share lock on the buffer content while examining tuple
*/
if (!skip)
{
+ /*
+ * For the benefit of logical decoding, have t_self point at the
+ * element of the HOT chain we're currently investigating instead
+ * of the root tuple of the HOT chain. This is important because
+ * the *Satisfies routine for historical mvcc snapshots needs the
+ * correct tid to decide about the visibility in some cases.
+ */
+ ItemPointerSet(&(heapTuple->t_self), BufferGetBlockNumber(buffer), offnum);
+
/* If it's visible per the snapshot, we must return it */
valid = HeapTupleSatisfiesVisibility(heapTuple, snapshot, buffer);
CheckForSerializableConflictOut(valid, relation, heapTuple,
buffer, snapshot);
+ /* reset to original, non-redirected, tid */
+ heapTuple->t_self = *tid;
+
if (valid)
{
ItemPointerSetOffsetNumber(tid, offnum);
* decoding.
*/
break;
+ case XLOG_HEAP2_REWRITE:
+ heap_xlog_logical_rewrite(lsn, record);
+ break;
default:
elog(PANIC, "heap2_redo: unknown op code %u", info);
}
#include "access/heapam_xlog.h"
#include "access/transam.h"
#include "access/htup_details.h"
+#include "catalog/catalog.h"
#include "miscadmin.h"
#include "pgstat.h"
#include "storage/bufmgr.h"
+#include "utils/snapmgr.h"
#include "utils/rel.h"
#include "utils/tqual.h"
-
/* Working data for heap_page_prune and subroutines */
typedef struct
{
* or RECENTLY_DEAD (see HeapTupleSatisfiesVacuum).
*/
void
-heap_page_prune_opt(Relation relation, Buffer buffer, TransactionId OldestXmin)
+heap_page_prune_opt(Relation relation, Buffer buffer)
{
Page page = BufferGetPage(buffer);
Size minfree;
+ TransactionId OldestXmin;
+
+ /*
+ * We can't write WAL in recovery mode, so there's no point trying to
+ * clean the page. The master will likely issue a cleaning WAL record soon
+ * anyway, so this is no particular loss.
+ */
+ if (RecoveryInProgress())
+ return;
+
+ /*
+ * Use the appropriate xmin horizon for this relation. If it's a proper
+ * catalog relation or a user defined, additional, catalog relation, we
+ * need to use the horizon that includes slots, otherwise the data-only
+ * horizon can be used. Note that the toast relation of user defined
+ * relations are *not* considered catalog relations.
+ */
+ if (IsCatalogRelation(relation) ||
+ RelationIsAccessibleInLogicalDecoding(relation))
+ OldestXmin = RecentGlobalXmin;
+ else
+ OldestXmin = RecentGlobalDataXmin;
+
+ Assert(TransactionIdIsValid(OldestXmin));
/*
* Let's see if we really need pruning.
if (!PageIsPrunable(page, OldestXmin))
return;
- /*
- * We can't write WAL in recovery mode, so there's no point trying to
- * clean the page. The master will likely issue a cleaning WAL record soon
- * anyway, so this is no particular loss.
- */
- if (RecoveryInProgress())
- return;
-
/*
* We prune when a previous UPDATE failed to find enough space on the page
* for a new tuple version, or when free space falls below the relation's
*/
#include "postgres.h"
+#include
+#include
+
+#include "miscadmin.h"
+
#include "access/heapam.h"
#include "access/heapam_xlog.h"
#include "access/rewriteheap.h"
#include "access/transam.h"
#include "access/tuptoaster.h"
+#include "access/xact.h"
+
+#include "catalog/catalog.h"
+
+#include "lib/ilist.h"
+
+#include "replication/logical.h"
+#include "replication/slot.h"
+
#include "storage/bufmgr.h"
+#include "storage/fd.h"
#include "storage/smgr.h"
+
#include "utils/memutils.h"
#include "utils/rel.h"
#include "utils/tqual.h"
+#include "storage/procarray.h"
/*
* State associated with a rewrite operation. This is opaque to the user
*/
typedef struct RewriteStateData
{
+ Relation rs_old_rel; /* source heap */
Relation rs_new_rel; /* destination heap */
Page rs_buffer; /* page currently being built */
BlockNumber rs_blockno; /* block where page will go */
bool rs_buffer_valid; /* T if any tuples in buffer */
bool rs_use_wal; /* must we WAL-log inserts? */
+ bool rs_logical_rewrite; /* do we need to do logical rewriting */
TransactionId rs_oldest_xmin; /* oldest xmin used by caller to
* determine tuple visibility */
TransactionId rs_freeze_xid;/* Xid that will be used as freeze cutoff
* point */
+ TransactionId rs_logical_xmin; /* Xid that will be used as cutoff
+ * point for logical rewrites */
MultiXactId rs_cutoff_multi;/* MultiXactId that will be used as cutoff
* point for multixacts */
MemoryContext rs_cxt; /* for hash tables and entries and tuples in
* them */
+ XLogRecPtr rs_begin_lsn; /* XLogInsertLsn when starting the rewrite */
HTAB *rs_unresolved_tups; /* unmatched A tuples */
HTAB *rs_old_new_tid_map; /* unmatched B tuples */
+ HTAB *rs_logical_mappings; /* logical remapping files */
+ uint32 rs_num_rewrite_mappings; /* # in memory mappings */
} RewriteStateData;
/*
typedef OldToNewMappingData *OldToNewMapping;
+/*
+ * In-Memory data for a xid that might need logical remapping entries
+ * to be logged.
+ */
+typedef struct RewriteMappingFile
+{
+ TransactionId xid; /* xid that might need to see the row */
+ int vfd; /* fd of mappings file */
+ off_t off; /* how far have we written yet */
+ uint32 num_mappings; /* number of in-memory mappings */
+ dlist_head mappings; /* list of in-memory mappings */
+ char path[MAXPGPATH]; /* path, for error messages */
+} RewriteMappingFile;
+
+/*
+ * A single In-Memeory logical rewrite mapping, hanging of
+ * RewriteMappingFile->mappings.
+ */
+typedef struct RewriteMappingDataEntry
+{
+ LogicalRewriteMappingData map; /* map between old and new location of
+ * the tuple */
+ dlist_node node;
+} RewriteMappingDataEntry;
+
/* prototypes for internal functions */
static void raw_heap_insert(RewriteState state, HeapTuple tup);
+/* internal logical remapping prototypes */
+static void logical_begin_heap_rewrite(RewriteState state);
+static void logical_rewrite_heap_tuple(RewriteState state, ItemPointerData old_tid, HeapTuple new_tuple);
+static void logical_end_heap_rewrite(RewriteState state);
+
/*
* Begin a rewrite of a table
*
+ * old_heap old, locked heap relation tuples will be read from
* new_heap new, locked heap relation to insert tuples to
* oldest_xmin xid used by the caller to determine which tuples are dead
* freeze_xid xid before which tuples will be frozen
* to be used in subsequent calls to the other functions.
*/
RewriteState
-begin_heap_rewrite(Relation new_heap, TransactionId oldest_xmin,
+begin_heap_rewrite(Relation old_heap, Relation new_heap, TransactionId oldest_xmin,
TransactionId freeze_xid, MultiXactId cutoff_multi,
bool use_wal)
{
/* Create and fill in the state struct */
state = palloc0(sizeof(RewriteStateData));
+ state->rs_old_rel = old_heap;
state->rs_new_rel = new_heap;
state->rs_buffer = (Page) palloc(BLCKSZ);
/* new_heap needn't be empty, just locked */
MemoryContextSwitchTo(old_cxt);
+ logical_begin_heap_rewrite(state);
+
return state;
}
if (RelationNeedsWAL(state->rs_new_rel))
heap_sync(state->rs_new_rel);
+ logical_end_heap_rewrite(state);
+
/* Deleting the context frees everything */
MemoryContextDelete(state->rs_cxt);
}
raw_heap_insert(state, new_tuple);
new_tid = new_tuple->t_self;
+ logical_rewrite_heap_tuple(state, old_tid, new_tuple);
+
/*
* If the tuple is the updated version of a row, and the prior version
* wouldn't be DEAD yet, then we need to either resolve the prior
if (heaptup != tup)
heap_freetuple(heaptup);
}
+
+/* ------------------------------------------------------------------------
+ * Logical rewrite support
+ *
+ * When doing logical decoding - which relies on using cmin/cmax of catalog
+ * tuples, via xl_heap_new_cid records - heap rewrites have to log enough
+ * information to allow the decoding backend to updates its internal mapping
+ * of (relfilenode,ctid) => (cmin, cmax) to be correct for the rewritten heap.
+ *
+ * For that, every time we find a tuple that's been modified in a catalog
+ * relation within the xmin horizon of any decoding slot, we log a mapping
+ * from the old to the new location.
+ *
+ * To deal with rewrites that abort the filename of a mapping file contains
+ * the xid of the transaction performing the rewrite, which then can be
+ * checked before being read in.
+ *
+ * For efficiency we don't immediately spill every single map mapping for a
+ * row to disk but only do so in batches when we've collected several of them
+ * in memory or when end_heap_rewrite() has been called.
+ *
+ * Crash-Safety: This module diverts from the usual patterns of doing WAL
+ * since it cannot rely on checkpoint flushing out all buffers and thus
+ * waiting for exlusive locks on buffers. Usually the XLogInsert() covering
+ * buffer modifications is performed while the buffer(s) that are being
+ * modified are exlusively locked guaranteeing that both the WAL record and
+ * the modified heap are on either side of the checkpoint. But since the
+ * mapping files we log aren't in shared_buffers that interlock doesn't work.
+ *
+ * Instead we simply write the mapping files out to disk, *before* the
+ * XLogInsert() is performed. That guarantees that either the XLogInsert() is
+ * inserted after the checkpoint's redo pointer or that the checkpoint (via
+ * LogicalRewriteHeapCheckpoint()) has flushed the (partial) mapping file to
+ * disk. That leaves the tail end that has not yet been flushed open to
+ * corruption, which is solved by including the current offset in the
+ * xl_heap_rewrite_mapping records and truncating the mapping file to it
+ * during replay. Every time a rewrite is finished all generated mapping files
+ * are synced to disk.
+ *
+ * Note that if we were only concerned about crash safety we wouldn't have to
+ * deal with WAL logging at all - an fsync() at the end of a rewrite would be
+ * sufficient for crash safety. Any mapping that hasn't been safely flushed to
+ * disk has to be by an aborted (explicitly or via a crash) transaction and is
+ * ignored by virtue of the xid in it's name being subject to a
+ * TransactionDidCommit() check. But we want to support having standbys via
+ * physical replication, both for availability and to to do logical decoding
+ * there.
+ * ------------------------------------------------------------------------
+ */
+
+/*
+ * Do preparations for logging logical mappings during a rewrite if
+ * necessary. If we detect that we don't need to log anything we'll prevent
+ * any further action by the various logical rewrite functions.
+ */
+static void
+logical_begin_heap_rewrite(RewriteState state)
+{
+ HASHCTL hash_ctl;
+ TransactionId logical_xmin;
+
+ /*
+ * We only need to persist these mappings if the rewritten table can be
+ * accessed during logical decoding, if not, we can skip doing any
+ * additional work.
+ */
+ state->rs_logical_rewrite =
+ RelationIsAccessibleInLogicalDecoding(state->rs_old_rel);
+
+ if (!state->rs_logical_rewrite)
+ return;
+
+ Assert(ReplicationSlotCtl != NULL);
+
+ ProcArrayGetReplicationSlotXmin(NULL, &logical_xmin);
+
+ /*
+ * If there are no logical slots in progress we don't need to do anything,
+ * there cannot be any remappings for relevant rows yet. The relation's
+ * lock protects us against races.
+ */
+ if (logical_xmin == InvalidTransactionId)
+ {
+ state->rs_logical_rewrite = false;
+ return;
+ }
+
+ state->rs_logical_xmin = logical_xmin;
+ state->rs_begin_lsn = GetXLogInsertRecPtr();
+ state->rs_num_rewrite_mappings = 0;
+
+ memset(&hash_ctl, 0, sizeof(hash_ctl));
+ hash_ctl.keysize = sizeof(TransactionId);
+ hash_ctl.entrysize = sizeof(RewriteMappingFile);
+ hash_ctl.hcxt = state->rs_cxt;
+ hash_ctl.hash = tag_hash;
+
+ state->rs_logical_mappings =
+ hash_create("Logical rewrite mapping",
+ 128, /* arbitrary initial size */
+ &hash_ctl,
+ HASH_ELEM | HASH_FUNCTION | HASH_CONTEXT);
+}
+
+/*
+ * Flush all logical in-memory mappings to disk, but don't fsync them yet.
+ */
+static void
+logical_heap_rewrite_flush_mappings(RewriteState state)
+{
+ HASH_SEQ_STATUS seq_status;
+ RewriteMappingFile *src;
+ dlist_mutable_iter iter;
+
+ Assert(state->rs_logical_rewrite);
+
+ /* no logical rewrite in progress, no need to iterate over mappings */
+ if (state->rs_num_rewrite_mappings == 0)
+ return;
+
+ elog(DEBUG1, "flushing %u logical rewrite mapping entries",
+ state->rs_num_rewrite_mappings);
+
+ hash_seq_init(&seq_status, state->rs_logical_mappings);
+ while ((src = (RewriteMappingFile *) hash_seq_search(&seq_status)) != NULL)
+ {
+ XLogRecData rdata[2];
+ char *waldata;
+ char *waldata_start;
+ xl_heap_rewrite_mapping xlrec;
+ Oid dboid;
+ uint32 len;
+ int written;
+
+ /* this file hasn't got any new mappings */
+ if (src->num_mappings == 0)
+ continue;
+
+ if (state->rs_old_rel->rd_rel->relisshared)
+ dboid = InvalidOid;
+ else
+ dboid = MyDatabaseId;
+
+ xlrec.num_mappings = src->num_mappings;
+ xlrec.mapped_rel = RelationGetRelid(state->rs_old_rel);
+ xlrec.mapped_xid = src->xid;
+ xlrec.mapped_db = dboid;
+ xlrec.offset = src->off;
+ xlrec.start_lsn = state->rs_begin_lsn;
+
+ rdata[0].data = (char *) (&xlrec);
+ rdata[0].len = sizeof(xlrec);
+ rdata[0].buffer = InvalidBuffer;
+ rdata[0].next = &(rdata[1]);
+
+ /* write all mappings consecutively */
+ len = src->num_mappings * sizeof(LogicalRewriteMappingData);
+ waldata = palloc(len);
+ waldata_start = waldata;
+
+ /*
+ * collect data we need to write out, but don't modify ondisk data yet
+ */
+ dlist_foreach_modify(iter, &src->mappings)
+ {
+ RewriteMappingDataEntry *pmap;
+
+ pmap = dlist_container(RewriteMappingDataEntry, node, iter.cur);
+
+ memcpy(waldata, &pmap->map, sizeof(pmap->map));
+ waldata += sizeof(pmap->map);
+
+ /* remove from the list and free */
+ dlist_delete(&pmap->node);
+ pfree(pmap);
+
+ /* update bookkeeping */
+ state->rs_num_rewrite_mappings--;
+ src->num_mappings--;
+ }
+
+ /*
+ * Note that we deviate from the usual WAL coding practices here,
+ * check the above "Logical rewrite support" comment for reasoning.
+ */
+ written = FileWrite(src->vfd, waldata_start, len);
+ if (written != len)
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not write to file \"%s\", wrote %d of %d: %m", src->path,
+ written, len)));
+ src->off += len;
+
+ Assert(src->num_mappings == 0);
+
+ rdata[1].data = waldata_start;
+ rdata[1].len = len;
+ rdata[1].buffer = InvalidBuffer;
+ rdata[1].next = NULL;
+
+ /* write xlog record */
+ XLogInsert(RM_HEAP2_ID, XLOG_HEAP2_REWRITE, rdata);
+
+ }
+ Assert(state->rs_num_rewrite_mappings == 0);
+}
+
+/*
+ * Logical remapping part of end_heap_rewrite().
+ */
+static void
+logical_end_heap_rewrite(RewriteState state)
+{
+ HASH_SEQ_STATUS seq_status;
+ RewriteMappingFile *src;
+
+ /* done, no logical rewrite in progress */
+ if (!state->rs_logical_rewrite)
+ return;
+
+ /* writeout remaining in-memory entries */
+ if (state->rs_num_rewrite_mappings > 0 )
+ logical_heap_rewrite_flush_mappings(state);
+
+ /* Iterate over all mappings we have written and fsync the files. */
+ hash_seq_init(&seq_status, state->rs_logical_mappings);
+ while ((src = (RewriteMappingFile *) hash_seq_search(&seq_status)) != NULL)
+ {
+ if(FileSync(src->vfd) != 0)
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not fsync file \"%s\": %m", src->path)));
+ FileClose(src->vfd);
+ }
+ /* memory context cleanup will deal with the rest */
+}
+
+/*
+ * Log a single (old->new) mapping for 'xid'.
+ */
+static void
+logical_rewrite_log_mapping(RewriteState state, TransactionId xid,
+ LogicalRewriteMappingData *map)
+{
+ RewriteMappingFile *src;
+ RewriteMappingDataEntry *pmap;
+ Oid relid;
+ bool found;
+
+ relid = RelationGetRelid(state->rs_old_rel);
+
+ /* look for existing mappings for this 'mapped' xid */
+ src = hash_search(state->rs_logical_mappings, &xid,
+ HASH_ENTER, &found);
+
+ /*
+ * We haven't yet had the need to map anything for this xid, create
+ * per-xid data structures.
+ */
+ if (!found)
+ {
+ char path[MAXPGPATH];
+ Oid dboid;
+
+ if (state->rs_old_rel->rd_rel->relisshared)
+ dboid = InvalidOid;
+ else
+ dboid = MyDatabaseId;
+
+ snprintf(path, MAXPGPATH,
+ "pg_llog/mappings/" LOGICAL_REWRITE_FORMAT,
+ dboid, relid,
+ (uint32) (state->rs_begin_lsn >> 32),
+ (uint32) state->rs_begin_lsn,
+ xid, GetCurrentTransactionId());
+
+ dlist_init(&src->mappings);
+ src->num_mappings = 0;
+ src->off = 0;
+ memcpy(src->path, path, sizeof(path));
+ src->vfd = PathNameOpenFile(path,
+ O_CREAT | O_EXCL | O_WRONLY | PG_BINARY,
+ S_IRUSR | S_IWUSR);
+ if (src->vfd < 0)
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not create file \"%s\": %m", path)));
+ }
+
+ pmap = MemoryContextAlloc(state->rs_cxt,
+ sizeof(RewriteMappingDataEntry));
+ memcpy(&pmap->map, map, sizeof(LogicalRewriteMappingData));
+ dlist_push_tail(&src->mappings, &pmap->node);
+ src->num_mappings++;
+ state->rs_num_rewrite_mappings++;
+
+ /*
+ * Write out buffer every time we've too many in-memory entries across all
+ * mapping files.
+ */
+ if (state->rs_num_rewrite_mappings >= 1000 /* arbitrary number */)
+ logical_heap_rewrite_flush_mappings(state);
+}
+
+/*
+ * Perform logical remapping for a tuple that's mapped from old_tid to
+ * new_tuple->t_self by rewrite_heap_tuple() iff necessary for the tuple.
+ */
+static void
+logical_rewrite_heap_tuple(RewriteState state, ItemPointerData old_tid,
+ HeapTuple new_tuple)
+{
+ ItemPointerData new_tid = new_tuple->t_self;
+ TransactionId cutoff = state->rs_logical_xmin;
+ TransactionId xmin;
+ TransactionId xmax;
+ bool do_log_xmin = false;
+ bool do_log_xmax = false;
+ LogicalRewriteMappingData map;
+
+ /* no logical rewrite in progress, we don't need to log anything */
+ if (!state->rs_logical_rewrite)
+ return;
+
+ xmin = HeapTupleHeaderGetXmin(new_tuple->t_data);
+ /* use *GetUpdateXid to correctly deal with multixacts */
+ xmax = HeapTupleHeaderGetUpdateXid(new_tuple->t_data);
+
+ /*
+ * Log the mapping iff the tuple has been created recently.
+ */
+ if (TransactionIdIsNormal(xmin) && !TransactionIdPrecedes(xmin, cutoff))
+ do_log_xmin = true;
+
+ if (!TransactionIdIsNormal(xmax))
+ {
+ /*
+ * no xmax is set, can't have any permanent ones, so this check is
+ * sufficient
+ */
+ }
+ else if (HEAP_XMAX_IS_LOCKED_ONLY(new_tuple->t_data->t_infomask))
+ {
+ /* only locked, we don't care */
+ }
+ else if (!TransactionIdPrecedes(xmax, cutoff))
+ {
+ /* tuple has been deleted recently, log */
+ do_log_xmax = true;
+ }
+
+ /* if neither needs to be logged, we're done */
+ if (!do_log_xmin && !do_log_xmax)
+ return;
+
+ /* fill out mapping information */
+ map.old_node = state->rs_old_rel->rd_node;
+ map.old_tid = old_tid;
+ map.new_node = state->rs_new_rel->rd_node;
+ map.new_tid = new_tid;
+
+ /* ---
+ * Now persist the mapping for the individual xids that are affected. We
+ * need to log for both xmin and xmax if they aren't the same transaction
+ * since the mapping files are per "affected" xid.
+ * We don't muster all that much effort detecting whether xmin and xmax
+ * are actually the same transaction, we just check whether the xid is the
+ * same disregarding subtransactions. Logging too much is relatively
+ * harmless and we could never do the check fully since subtransaction
+ * data is thrown away during restarts.
+ * ---
+ */
+ if (do_log_xmin)
+ logical_rewrite_log_mapping(state, xmin, &map);
+ /* separately log mapping for xmax unless it'd be redundant */
+ if (do_log_xmax && !TransactionIdEquals(xmin, xmax))
+ logical_rewrite_log_mapping(state, xmax, &map);
+}
+
+/*
+ * Replay XLOG_HEAP2_REWRITE records
+ */
+void
+heap_xlog_logical_rewrite(XLogRecPtr lsn, XLogRecord *r)
+{
+ char path[MAXPGPATH];
+ int fd;
+ xl_heap_rewrite_mapping *xlrec;
+ uint32 len;
+ char *data;
+
+ xlrec = (xl_heap_rewrite_mapping *) XLogRecGetData(r);
+
+ snprintf(path, MAXPGPATH,
+ "pg_llog/mappings/" LOGICAL_REWRITE_FORMAT,
+ xlrec->mapped_db, xlrec->mapped_rel,
+ (uint32) (xlrec->start_lsn >> 32),
+ (uint32) xlrec->start_lsn,
+ xlrec->mapped_xid, r->xl_xid);
+
+ fd = OpenTransientFile(path,
+ O_CREAT | O_WRONLY | PG_BINARY,
+ S_IRUSR | S_IWUSR);
+ if (fd < 0)
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not create file \"%s\": %m", path)));
+ /*
+ * Truncate all data that's not guaranteed to have been safely fsynced (by
+ * previous record or by the last checkpoint).
+ */
+ if (ftruncate(fd, xlrec->offset) != 0)
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not truncate file \"%s\" to %u: %m",
+ path, (uint32) xlrec->offset)));
+
+ /* now seek to the position we want to write our data to */
+ if (lseek(fd, xlrec->offset, SEEK_SET) != xlrec->offset)
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not seek to the end of file \"%s\": %m",
+ path)));
+
+ data = XLogRecGetData(r) + sizeof(*xlrec);
+
+ len = xlrec->num_mappings * sizeof(LogicalRewriteMappingData);
+
+ /* write out tail end of mapping file (again) */
+ if (write(fd, data, len) != len)
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not write to file \"%s\": %m", path)));
+ /*
+ * Now fsync all previously written data. We could improve things and only
+ * do this for the last write to a file, but the required bookkeeping
+ * doesn't seem worth the trouble.
+ */
+ if (pg_fsync(fd) != 0)
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not fsync file \"%s\": %m", path)));
+
+ CloseTransientFile(fd);
+}
+
+/* ---
+ * Perform a checkpoint for logical rewrite mappings
+ *
+ * This serves two tasks:
+ * 1) Remove all mappings not needed anymore based on the logical restart LSN
+ * 2) Flush all remaining mappings to disk, so that replay after a checkpoint
+ * only has to deal with the parts of a mapping that have been written out
+ * after the checkpoint started.
+ * ---
+ */
+void
+CheckPointLogicalRewriteHeap(void)
+{
+ XLogRecPtr cutoff;
+ XLogRecPtr redo;
+ DIR *mappings_dir;
+ struct dirent *mapping_de;
+ char path[MAXPGPATH];
+
+ /*
+ * We start of with a minimum of the last redo pointer. No new decoding
+ * slot will start before that, so that's a safe upper bound for removal.
+ */
+ redo = GetRedoRecPtr();
+
+ /* now check for the restart ptrs from existing slots */
+ cutoff = ReplicationSlotsComputeLogicalRestartLSN();
+
+ /* don't start earlier than the restart lsn */
+ if (cutoff != InvalidXLogRecPtr && redo < cutoff)
+ cutoff = redo;
+
+ mappings_dir = AllocateDir("pg_llog/mappings");
+ while ((mapping_de = ReadDir(mappings_dir, "pg_llog/mappings")) != NULL)
+ {
+ struct stat statbuf;
+ Oid dboid;
+ Oid relid;
+ XLogRecPtr lsn;
+ TransactionId rewrite_xid;
+ TransactionId create_xid;
+ uint32 hi, lo;
+
+ if (strcmp(mapping_de->d_name, ".") == 0 ||
+ strcmp(mapping_de->d_name, "..") == 0)
+ continue;
+
+ snprintf(path, MAXPGPATH, "pg_llog/mappings/%s", mapping_de->d_name);
+ if (lstat(path, &statbuf) == 0 && !S_ISREG(statbuf.st_mode))
+ continue;
+
+ /* Skip over files that cannot be ours. */
+ if (strncmp(mapping_de->d_name, "map-", 4) != 0)
+ continue;
+
+ if (sscanf(mapping_de->d_name, LOGICAL_REWRITE_FORMAT,
+ &dboid, &relid, &hi, &lo, &rewrite_xid, &create_xid) != 6)
+ elog(ERROR,"could not parse filename \"%s\"", mapping_de->d_name);
+
+ lsn = ((uint64) hi) << 32 | lo;
+
+ if (lsn < cutoff || cutoff == InvalidXLogRecPtr)
+ {
+ elog(DEBUG1, "removing logical rewrite file \"%s\"", path);
+ if (unlink(path) < 0)
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not unlink file \"%s\": %m", path)));
+ }
+ else
+ {
+ int fd = OpenTransientFile(path, O_RDONLY | PG_BINARY, 0);
+
+ /*
+ * The file cannot vanish due to concurrency since this function
+ * is the only one removing logical mappings and it's run while
+ * CheckpointLock is held exclusively.
+ */
+ if (fd < 0)
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not open file \"%s\": %m", path)));
+ /*
+ * We could try to avoid fsyncing files that either haven't
+ * changed or have only been created since the checkpoint's start,
+ * but it's currently not deemed worth the effort.
+ */
+ else if (pg_fsync(fd) != 0)
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not fsync file \"%s\": %m", path)));
+ CloseTransientFile(fd);
+ }
+ }
+ FreeDir(mappings_dir);
+}
#undef TOAST_DEBUG
-/*
- * Testing whether an externally-stored value is compressed now requires
- * comparing extsize (the actual length of the external data) to rawsize
- * (the original uncompressed datum's size). The latter includes VARHDRSZ
- * overhead, the former doesn't. We never use compression unless it actually
- * saves space, so we expect either equality or less-than.
- */
-#define VARATT_EXTERNAL_IS_COMPRESSED(toast_pointer) \
- ((toast_pointer).va_extsize < (toast_pointer).va_rawsize - VARHDRSZ)
-
-/*
- * Macro to fetch the possibly-unaligned contents of an EXTERNAL datum
- * into a local "struct varatt_external" toast pointer. This should be
- * just a memcpy, but some versions of gcc seem to produce broken code
- * that assumes the datum contents are aligned. Introducing an explicit
- * intermediate "varattrib_1b_e *" variable seems to fix it.
- */
-#define VARATT_EXTERNAL_GET_POINTER(toast_pointer, attr) \
-do { \
- varattrib_1b_e *attre = (varattrib_1b_e *) (attr); \
- Assert(VARATT_IS_EXTERNAL(attre)); \
- Assert(VARSIZE_EXTERNAL(attre) == sizeof(toast_pointer) + VARHDRSZ_EXTERNAL); \
- memcpy(&(toast_pointer), VARDATA_EXTERNAL(attre), sizeof(toast_pointer)); \
-} while (0)
-
-
static void toast_delete_datum(Relation rel, Datum value);
static Datum toast_save_datum(Relation rel, Datum value,
struct varlena * oldexternal, int options);
#include "access/relscan.h"
#include "access/transam.h"
+#include "access/xlog.h"
+
#include "catalog/index.h"
+#include "catalog/catalog.h"
#include "pgstat.h"
#include "storage/bufmgr.h"
#include "storage/lmgr.h"
* Prune page, but only if we weren't already on this page
*/
if (prev_buf != scan->xs_cbuf)
- heap_page_prune_opt(scan->heapRelation, scan->xs_cbuf,
- RecentGlobalXmin);
+ heap_page_prune_opt(scan->heapRelation, scan->xs_cbuf);
}
/* Obtain share-lock on the buffer so we can examine visibility */
xlrec->node.relNode, xlrec->block,
xlrec->cutoff_xid, xlrec->ntuples);
}
+ else if (info == XLOG_HEAP2_REWRITE)
+ {
+ appendStringInfoString(buf, "heap rewrite:");
+ }
else if (info == XLOG_HEAP2_CLEANUP_INFO)
{
xl_heap_cleanup_info *xlrec = (xl_heap_cleanup_info *) rec;
/*
* Do we need the long commit record? If not, use the compact format.
+ *
+ * For now always use the non-compact version if wal_level=logical, so
+ * we can hide commits from other databases. TODO: In the future we
+ * should merge compact and non-compact commits and use a flags
+ * variable to determine if it contains subxacts, relations or
+ * invalidation messages, that's more extensible and degrades more
+ * gracefully. Till then, it's just 20 bytes of overhead.
*/
- if (nrels > 0 || nmsgs > 0 || RelcacheInitFileInval || forceSyncCommit)
+ if (nrels > 0 || nmsgs > 0 || RelcacheInitFileInval || forceSyncCommit ||
+ XLogLogicalInfoActive())
{
XLogRecData rdata[4];
int lastrdata = 0;
#include "access/clog.h"
#include "access/multixact.h"
+#include "access/rewriteheap.h"
#include "access/subtrans.h"
#include "access/timeline.h"
#include "access/transam.h"
#include "pgstat.h"
#include "postmaster/bgwriter.h"
#include "postmaster/startup.h"
+#include "replication/logical.h"
#include "replication/slot.h"
+#include "replication/snapbuild.h"
#include "replication/walreceiver.h"
#include "replication/walsender.h"
#include "storage/barrier.h"
}
}
+/*
+ * Return the last WAL segment removed, or 0 if no segment has been removed
+ * since startup.
+ *
+ * NB: the result can be out of date arbitrarily fast, the caller has to deal
+ * with that.
+ */
+XLogSegNo
+XLogGetLastRemovedSegno(void)
+{
+ /* use volatile pointer to prevent code rearrangement */
+ volatile XLogCtlData *xlogctl = XLogCtl;
+ XLogSegNo lastRemovedSegNo;
+
+ SpinLockAcquire(&xlogctl->info_lck);
+ lastRemovedSegNo = xlogctl->lastRemovedSegNo;
+ SpinLockRelease(&xlogctl->info_lck);
+
+ return lastRemovedSegNo;
+}
+
/*
* Update the last removed segno pointer in shared memory, to reflect
* that the given XLOG file has been removed.
*/
StartupReplicationSlots(checkPoint.redo);
+ /*
+ * Startup logical state, needs to be setup now so we have proper data
+ * during crash recovery.
+ */
+ StartupReorderBuffer();
+
/*
* Startup MultiXact. We need to do this early for two reasons: one
* is that we might try to access multixacts when we do tuple freezing,
* StartupSUBTRANS hasn't been called yet.
*/
if (!RecoveryInProgress())
- TruncateSUBTRANS(GetOldestXmin(true, false));
+ TruncateSUBTRANS(GetOldestXmin(NULL, false));
/* Real work is done, but log and update stats before releasing lock. */
LogCheckpointEnd(false);
CheckPointPredicate();
CheckPointRelationMap();
CheckPointReplicationSlots();
+ CheckPointSnapBuild();
+ CheckPointLogicalRewriteHeap();
CheckPointBuffers(flags); /* performs all required fsyncs */
/* We deliberately delay 2PC checkpointing as long as possible */
CheckPointTwoPhase(checkPointRedo);
* this because StartupSUBTRANS hasn't been called yet.
*/
if (EnableHotStandby)
- TruncateSUBTRANS(GetOldestXmin(true, false));
+ TruncateSUBTRANS(GetOldestXmin(NULL, false));
/* Real work is done, but log and update before releasing lock. */
LogCheckpointEnd(true);
{
snapshot = SnapshotAny;
/* okay to ignore lazy VACUUMs here */
- OldestXmin = GetOldestXmin(heapRelation->rd_rel->relisshared, true);
+ OldestXmin = GetOldestXmin(heapRelation, true);
}
scan = heap_beginscan_strat(heapRelation, /* relation */
CREATE VIEW pg_replication_slots AS
SELECT
L.slot_name,
+ L.plugin,
L.slot_type,
L.datoid,
D.datname AS database,
L.active,
L.xmin,
+ L.catalog_xmin,
L.restart_lsn
FROM pg_get_replication_slots() AS L
LEFT JOIN pg_database D ON (L.datoid = D.oid);
CREATE OR REPLACE FUNCTION
json_populate_recordset(base anyelement, from_json json, use_json_as_text boolean DEFAULT false)
RETURNS SETOF anyelement LANGUAGE internal STABLE ROWS 100 AS 'json_populate_recordset';
+
+CREATE OR REPLACE FUNCTION pg_logical_slot_get_changes(
+ IN slotname name, IN upto_lsn pg_lsn, IN upto_nchanges int, VARIADIC options text[] DEFAULT '{}',
+ OUT location pg_lsn, OUT xid xid, OUT data text)
+RETURNS SETOF RECORD
+LANGUAGE INTERNAL
+VOLATILE ROWS 1000 COST 1000
+AS 'pg_logical_slot_get_changes';
+
+CREATE OR REPLACE FUNCTION pg_logical_slot_peek_changes(
+ IN slotname name, IN upto_lsn pg_lsn, IN upto_nchanges int, VARIADIC options text[] DEFAULT '{}',
+ OUT location pg_lsn, OUT xid xid, OUT data text)
+RETURNS SETOF RECORD
+LANGUAGE INTERNAL
+VOLATILE ROWS 1000 COST 1000
+AS 'pg_logical_slot_peek_changes';
+
+CREATE OR REPLACE FUNCTION pg_logical_slot_get_binary_changes(
+ IN slotname name, IN upto_lsn pg_lsn, IN upto_nchanges int, VARIADIC options text[] DEFAULT '{}',
+ OUT location pg_lsn, OUT xid xid, OUT data bytea)
+RETURNS SETOF RECORD
+LANGUAGE INTERNAL
+VOLATILE ROWS 1000 COST 1000
+AS 'pg_logical_slot_get_binary_changes';
+
+CREATE OR REPLACE FUNCTION pg_logical_slot_peek_binary_changes(
+ IN slotname name, IN upto_lsn pg_lsn, IN upto_nchanges int, VARIADIC options text[] DEFAULT '{}',
+ OUT location pg_lsn, OUT xid xid, OUT data bytea)
+RETURNS SETOF RECORD
+LANGUAGE INTERNAL
+VOLATILE ROWS 1000 COST 1000
+AS 'pg_logical_slot_peek_binary_changes';
#include "access/tuptoaster.h"
#include "access/visibilitymap.h"
#include "access/xact.h"
+#include "catalog/catalog.h"
#include "catalog/index.h"
#include "catalog/indexing.h"
#include "catalog/pg_collation.h"
totalblocks = RelationGetNumberOfBlocks(onerel);
/* Need a cutoff xmin for HeapTupleSatisfiesVacuum */
- OldestXmin = GetOldestXmin(onerel->rd_rel->relisshared, true);
+ OldestXmin = GetOldestXmin(onerel, true);
/* Prepare for sampling block numbers */
BlockSampler_Init(&bs, totalblocks, targrows);
* Since we're going to rewrite the whole table anyway, there's no reason
* not to be aggressive about this.
*/
- vacuum_set_xid_limits(0, 0, 0, 0, OldHeap->rd_rel->relisshared,
+ vacuum_set_xid_limits(OldHeap, 0, 0, 0, 0,
&OldestXmin, &FreezeXid, NULL, &MultiXactCutoff,
NULL);
is_system_catalog = IsSystemRelation(OldHeap);
/* Initialize the rewrite operation */
- rwstate = begin_heap_rewrite(NewHeap, OldestXmin, FreezeXid,
+ rwstate = begin_heap_rewrite(OldHeap, NewHeap, OldestXmin, FreezeXid,
MultiXactCutoff, use_wal);
/*
#include "miscadmin.h"
#include "pgstat.h"
#include "postmaster/bgwriter.h"
+#include "replication/slot.h"
#include "storage/copydir.h"
#include "storage/fd.h"
#include "storage/lmgr.h"
HeapTuple tup;
int notherbackends;
int npreparedxacts;
+ int nslots, nslots_active;
/*
* Look up the target database's OID, and get exclusive lock on it. We
(errcode(ERRCODE_OBJECT_IN_USE),
errmsg("cannot drop the currently open database")));
+ /*
+ * Check whether there are, possibly unconnected, logical slots that refer
+ * to the to-be-dropped database. The database lock we are holding
+ * prevents the creation of new slots using the database.
+ */
+ if (ReplicationSlotsCountDBSlots(db_id, &nslots, &nslots_active))
+ ereport(ERROR,
+ (errcode(ERRCODE_OBJECT_IN_USE),
+ errmsg("database \"%s\" is used by a logical decoding slot",
+ dbname),
+ errdetail("There are %d slot(s), %d of them active",
+ nslots, nslots_active)));
+
/*
* Check for other backends in the target database. (Because we hold the
* database lock, no new ones can start after this.)
* not interested.
*/
void
-vacuum_set_xid_limits(int freeze_min_age,
+vacuum_set_xid_limits(Relation rel,
+ int freeze_min_age,
int freeze_table_age,
int multixact_freeze_min_age,
int multixact_freeze_table_age,
- bool sharedRel,
TransactionId *oldestXmin,
TransactionId *freezeLimit,
TransactionId *xidFullScanLimit,
* working on a particular table at any time, and that each vacuum is
* always an independent transaction.
*/
- *oldestXmin = GetOldestXmin(sharedRel, true);
+ *oldestXmin = GetOldestXmin(rel, true);
Assert(TransactionIdIsNormal(*oldestXmin));
* committed pg_class entries for new tables; see AddNewRelationTuple().
* So we cannot produce a wrong minimum by starting with this.
*/
- newFrozenXid = GetOldestXmin(true, true);
+ newFrozenXid = GetOldestXmin(NULL, true);
/*
* Similarly, initialize the MultiXact "min" with the value that would be
#include "access/multixact.h"
#include "access/transam.h"
#include "access/visibilitymap.h"
+#include "catalog/catalog.h"
#include "catalog/storage.h"
#include "commands/dbcommands.h"
#include "commands/vacuum.h"
vac_strategy = bstrategy;
- vacuum_set_xid_limits(vacstmt->freeze_min_age, vacstmt->freeze_table_age,
+ vacuum_set_xid_limits(onerel,
+ vacstmt->freeze_min_age, vacstmt->freeze_table_age,
vacstmt->multixact_freeze_min_age,
vacstmt->multixact_freeze_table_age,
- onerel->rd_rel->relisshared,
&OldestXmin, &FreezeLimit, &xidFullScanLimit,
&MultiXactCutoff, &mxactFullScanLimit);
/*
* Prune and repair fragmentation for the whole page, if possible.
*/
- Assert(TransactionIdIsValid(RecentGlobalXmin));
- heap_page_prune_opt(scan->rs_rd, buffer, RecentGlobalXmin);
+ heap_page_prune_opt(scan->rs_rd, buffer);
/*
* We must hold share lock on the buffer content while examining tuple
OBJS = walsender.o walreceiverfuncs.o walreceiver.o basebackup.o \
repl_gram.o slot.o slotfuncs.o syncrep.o
+SUBDIRS = logical
+
include $(top_srcdir)/src/backend/common.mk
# repl_scanner is compiled as part of repl_gram
--- /dev/null
+#-------------------------------------------------------------------------
+#
+# Makefile--
+# Makefile for src/backend/replication/logical
+#
+# IDENTIFICATION
+# src/backend/replication/logical/Makefile
+#
+#-------------------------------------------------------------------------
+
+subdir = src/backend/replication/logical
+top_builddir = ../../../..
+include $(top_builddir)/src/Makefile.global
+
+override CPPFLAGS := -I$(srcdir) $(CPPFLAGS)
+
+OBJS = decode.o logical.o logicalfuncs.o reorderbuffer.o snapbuild.o
+
+include $(top_srcdir)/src/backend/common.mk
--- /dev/null
+/* -------------------------------------------------------------------------
+ *
+ * decode.c
+ * This module decodes WAL records read using xlogreader.h's APIs for the
+ * purpose of logical decoding by passing information to the
+ * reorderbuffer module (containing the actual changes) and to the
+ * snapbuild module to build a fitting catalog snapshot (to be able to
+ * properly decode the changes in the reorderbuffer).
+ *
+ * NOTE:
+ * This basically tries to handle all low level xlog stuff for
+ * reorderbuffer.c and snapbuild.c. There's some minor leakage where a
+ * specific record's struct is used to pass data along, but those just
+ * happen to contain the right amount of data in a convenient
+ * format. There isn't and shouldn't be much intelligence about the
+ * contents of records in here except turning them into a more usable
+ * format.
+ *
+ * Portions Copyright (c) 1996-2014, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * IDENTIFICATION
+ * src/backend/replication/logical/decode.c
+ *
+ * -------------------------------------------------------------------------
+ */
+#include "postgres.h"
+
+#include "access/heapam.h"
+#include "access/heapam_xlog.h"
+#include "access/transam.h"
+#include "access/xact.h"
+#include "access/xlog_internal.h"
+#include "access/xlogreader.h"
+
+#include "catalog/pg_control.h"
+
+#include "replication/decode.h"
+#include "replication/logical.h"
+#include "replication/reorderbuffer.h"
+#include "replication/snapbuild.h"
+
+#include "storage/standby.h"
+
+typedef struct XLogRecordBuffer
+{
+ XLogRecPtr origptr;
+ XLogRecPtr endptr;
+ XLogRecord record;
+ char *record_data;
+} XLogRecordBuffer;
+
+/* RMGR Handlers */
+static void DecodeXLogOp(LogicalDecodingContext *ctx, XLogRecordBuffer *buf);
+static void DecodeHeapOp(LogicalDecodingContext *ctx, XLogRecordBuffer *buf);
+static void DecodeHeap2Op(LogicalDecodingContext *ctx, XLogRecordBuffer *buf);
+static void DecodeXactOp(LogicalDecodingContext *ctx, XLogRecordBuffer *buf);
+static void DecodeStandbyOp(LogicalDecodingContext *ctx, XLogRecordBuffer *buf);
+
+/* individual record(group)'s handlers */
+static void DecodeInsert(LogicalDecodingContext *ctx, XLogRecordBuffer *buf);
+static void DecodeUpdate(LogicalDecodingContext *ctx, XLogRecordBuffer *buf);
+static void DecodeDelete(LogicalDecodingContext *ctx, XLogRecordBuffer *buf);
+static void DecodeMultiInsert(LogicalDecodingContext *ctx, XLogRecordBuffer *buf);
+static void DecodeCommit(LogicalDecodingContext *ctx, XLogRecordBuffer *buf,
+ TransactionId xid, Oid dboid,
+ TimestampTz commit_time,
+ int nsubxacts, TransactionId *sub_xids,
+ int ninval_msgs, SharedInvalidationMessage *msg);
+static void DecodeAbort(LogicalDecodingContext *ctx, XLogRecPtr lsn,
+ TransactionId xid, TransactionId *sub_xids, int nsubxacts);
+
+/* common function to decode tuples */
+static void DecodeXLogTuple(char *data, Size len, ReorderBufferTupleBuf *tup);
+
+/*
+ * Take every XLogReadRecord()ed record and perform the actions required to
+ * decode it using the output plugin already setup in the logical decoding
+ * context.
+ */
+void
+LogicalDecodingProcessRecord(LogicalDecodingContext *ctx, XLogRecord *record)
+{
+ XLogRecordBuffer buf;
+
+ buf.origptr = ctx->reader->ReadRecPtr;
+ buf.endptr = ctx->reader->EndRecPtr;
+ buf.record = *record;
+ buf.record_data = XLogRecGetData(record);
+
+ /* cast so we get a warning when new rmgrs are added */
+ switch ((RmgrIds) buf.record.xl_rmid)
+ {
+ /*
+ * Rmgrs we care about for logical decoding. Add new rmgrs in
+ * rmgrlist.h's order.
+ */
+ case RM_XLOG_ID:
+ DecodeXLogOp(ctx, &buf);
+ break;
+
+ case RM_XACT_ID:
+ DecodeXactOp(ctx, &buf);
+ break;
+
+ case RM_STANDBY_ID:
+ DecodeStandbyOp(ctx, &buf);
+ break;
+
+ case RM_HEAP2_ID:
+ DecodeHeap2Op(ctx, &buf);
+ break;
+
+ case RM_HEAP_ID:
+ DecodeHeapOp(ctx, &buf);
+ break;
+
+ /*
+ * Rmgrs irrelevant for logical decoding; they describe stuff not
+ * represented in logical decoding. Add new rmgrs in rmgrlist.h's
+ * order.
+ */
+ case RM_SMGR_ID:
+ case RM_CLOG_ID:
+ case RM_DBASE_ID:
+ case RM_TBLSPC_ID:
+ case RM_MULTIXACT_ID:
+ case RM_RELMAP_ID:
+ case RM_BTREE_ID:
+ case RM_HASH_ID:
+ case RM_GIN_ID:
+ case RM_GIST_ID:
+ case RM_SEQ_ID:
+ case RM_SPGIST_ID:
+ break;
+ case RM_NEXT_ID:
+ elog(ERROR, "unexpected RM_NEXT_ID rmgr_id: %u", (RmgrIds) buf.record.xl_rmid);
+ }
+}
+
+/*
+ * Handle rmgr XLOG_ID records for DecodeRecordIntoReorderBuffer().
+ */
+static void
+DecodeXLogOp(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
+{
+ SnapBuild *builder = ctx->snapshot_builder;
+ uint8 info = buf->record.xl_info & ~XLR_INFO_MASK;
+
+ switch (info)
+ {
+ /* this is also used in END_OF_RECOVERY checkpoints */
+ case XLOG_CHECKPOINT_SHUTDOWN:
+ case XLOG_END_OF_RECOVERY:
+ SnapBuildSerializationPoint(builder, buf->origptr);
+
+ break;
+ case XLOG_CHECKPOINT_ONLINE:
+ /*
+ * a RUNNING_XACTS record will have been logged near to this, we
+ * can restart from there.
+ */
+ break;
+ case XLOG_NOOP:
+ case XLOG_NEXTOID:
+ case XLOG_SWITCH:
+ case XLOG_BACKUP_END:
+ case XLOG_PARAMETER_CHANGE:
+ case XLOG_RESTORE_POINT:
+ case XLOG_FPW_CHANGE:
+ case XLOG_FPI:
+ break;
+ default:
+ elog(ERROR, "unexpected RM_XLOG_ID record type: %u", info);
+ }
+}
+
+/*
+ * Handle rmgr XACT_ID records for DecodeRecordIntoReorderBuffer().
+ */
+static void
+DecodeXactOp(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
+{
+ SnapBuild *builder = ctx->snapshot_builder;
+ ReorderBuffer *reorder = ctx->reorder;
+ XLogRecord *r = &buf->record;
+ uint8 info = r->xl_info & ~XLR_INFO_MASK;
+
+ /* no point in doing anything yet, data could not be decoded anyway */
+ if (SnapBuildCurrentState(builder) < SNAPBUILD_FULL_SNAPSHOT)
+ return;
+
+ switch (info)
+ {
+ case XLOG_XACT_COMMIT:
+ {
+ xl_xact_commit *xlrec;
+ TransactionId *subxacts = NULL;
+ SharedInvalidationMessage *invals = NULL;
+
+ xlrec = (xl_xact_commit *) buf->record_data;
+
+ subxacts = (TransactionId *) &(xlrec->xnodes[xlrec->nrels]);
+ invals = (SharedInvalidationMessage *) &(subxacts[xlrec->nsubxacts]);
+
+ DecodeCommit(ctx, buf, r->xl_xid, xlrec->dbId,
+ xlrec->xact_time,
+ xlrec->nsubxacts, subxacts,
+ xlrec->nmsgs, invals);
+
+ break;
+ }
+ case XLOG_XACT_COMMIT_PREPARED:
+ {
+ xl_xact_commit_prepared *prec;
+ xl_xact_commit *xlrec;
+ TransactionId *subxacts;
+ SharedInvalidationMessage *invals = NULL;
+
+ /* Prepared commits contain a normal commit record... */
+ prec = (xl_xact_commit_prepared *) buf->record_data;
+ xlrec = &prec->crec;
+
+ subxacts = (TransactionId *) &(xlrec->xnodes[xlrec->nrels]);
+ invals = (SharedInvalidationMessage *) &(subxacts[xlrec->nsubxacts]);
+
+ DecodeCommit(ctx, buf, r->xl_xid, xlrec->dbId,
+ xlrec->xact_time,
+ xlrec->nsubxacts, subxacts,
+ xlrec->nmsgs, invals);
+
+ break;
+ }
+ case XLOG_XACT_COMMIT_COMPACT:
+ {
+ xl_xact_commit_compact *xlrec;
+
+ xlrec = (xl_xact_commit_compact *) buf->record_data;
+
+ DecodeCommit(ctx, buf, r->xl_xid, InvalidOid,
+ xlrec->xact_time,
+ xlrec->nsubxacts, xlrec->subxacts,
+ 0, NULL);
+ break;
+ }
+ case XLOG_XACT_ABORT:
+ {
+ xl_xact_abort *xlrec;
+ TransactionId *sub_xids;
+
+ xlrec = (xl_xact_abort *) buf->record_data;
+
+ sub_xids = (TransactionId *) &(xlrec->xnodes[xlrec->nrels]);
+
+ DecodeAbort(ctx, buf->origptr, r->xl_xid,
+ sub_xids, xlrec->nsubxacts);
+ break;
+ }
+ case XLOG_XACT_ABORT_PREPARED:
+ {
+ xl_xact_abort_prepared *prec;
+ xl_xact_abort *xlrec;
+ TransactionId *sub_xids;
+
+ /* prepared abort contain a normal commit abort... */
+ prec = (xl_xact_abort_prepared *) buf->record_data;
+ xlrec = &prec->arec;
+
+ sub_xids = (TransactionId *) &(xlrec->xnodes[xlrec->nrels]);
+
+ /* r->xl_xid is committed in a separate record */
+ DecodeAbort(ctx, buf->origptr, prec->xid,
+ sub_xids, xlrec->nsubxacts);
+ break;
+ }
+
+ case XLOG_XACT_ASSIGNMENT:
+ {
+ xl_xact_assignment *xlrec;
+ int i;
+ TransactionId *sub_xid;
+
+ xlrec = (xl_xact_assignment *) buf->record_data;
+
+ sub_xid = &xlrec->xsub[0];
+
+ for (i = 0; i < xlrec->nsubxacts; i++)
+ {
+ ReorderBufferAssignChild(reorder, xlrec->xtop,
+ *(sub_xid++), buf->origptr);
+ }
+ break;
+ }
+ case XLOG_XACT_PREPARE:
+ /*
+ * Currently decoding ignores PREPARE TRANSACTION and will just
+ * decode the transaction when the COMMIT PREPARED is sent or
+ * throw away the transaction's contents when a ROLLBACK PREPARED
+ * is received. In the future we could add code to expose prepared
+ * transactions in the changestream allowing for a kind of
+ * distributed 2PC.
+ */
+ break;
+ default:
+ elog(ERROR, "unexpected RM_XACT_ID record type: %u", info);
+ }
+}
+
+/*
+ * Handle rmgr STANDBY_ID records for DecodeRecordIntoReorderBuffer().
+ */
+static void
+DecodeStandbyOp(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
+{
+ SnapBuild *builder = ctx->snapshot_builder;
+ XLogRecord *r = &buf->record;
+ uint8 info = r->xl_info & ~XLR_INFO_MASK;
+
+ switch (info)
+ {
+ case XLOG_RUNNING_XACTS:
+ {
+ xl_running_xacts *running = (xl_running_xacts *) buf->record_data;
+ SnapBuildProcessRunningXacts(builder, buf->origptr, running);
+ /*
+ * Abort all transactions that we keep track of, that are
+ * older than the record's oldestRunningXid. This is the most
+ * convenient spot for doing so since, in contrast to shutdown
+ * or end-of-recovery checkpoints, we have information about
+ * all running transactions which includes prepared ones,
+ * while shutdown checkpoints just know that no non-prepared
+ * transactions are in progress.
+ */
+ ReorderBufferAbortOld(ctx->reorder, running->oldestRunningXid);
+ }
+ break;
+ case XLOG_STANDBY_LOCK:
+ break;
+ default:
+ elog(ERROR, "unexpected RM_STANDBY_ID record type: %u", info);
+ }
+}
+
+/*
+ * Handle rmgr HEAP2_ID records for DecodeRecordIntoReorderBuffer().
+ */
+static void
+DecodeHeap2Op(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
+{
+ uint8 info = buf->record.xl_info & XLOG_HEAP_OPMASK;
+ TransactionId xid = buf->record.xl_xid;
+ SnapBuild *builder = ctx->snapshot_builder;
+
+ /* no point in doing anything yet */
+ if (SnapBuildCurrentState(builder) < SNAPBUILD_FULL_SNAPSHOT)
+ return;
+
+ switch (info)
+ {
+ case XLOG_HEAP2_MULTI_INSERT:
+ if (SnapBuildProcessChange(builder, xid, buf->origptr))
+ DecodeMultiInsert(ctx, buf);
+ break;
+ case XLOG_HEAP2_NEW_CID:
+ {
+ xl_heap_new_cid *xlrec;
+ xlrec = (xl_heap_new_cid *) buf->record_data;
+ SnapBuildProcessNewCid(builder, xid, buf->origptr, xlrec);
+
+ break;
+ }
+ case XLOG_HEAP2_REWRITE:
+ /*
+ * Although these records only exist to serve the needs of logical
+ * decoding, all the work happens as part of crash or archive
+ * recovery, so we don't need to do anything here.
+ */
+ break;
+ /*
+ * Everything else here is just low level physical stuff we're
+ * not interested in.
+ */
+ case XLOG_HEAP2_FREEZE_PAGE:
+ case XLOG_HEAP2_CLEAN:
+ case XLOG_HEAP2_CLEANUP_INFO:
+ case XLOG_HEAP2_VISIBLE:
+ case XLOG_HEAP2_LOCK_UPDATED:
+ break;
+ default:
+ elog(ERROR, "unexpected RM_HEAP2_ID record type: %u", info);
+ }
+}
+
+/*
+ * Handle rmgr HEAP_ID records for DecodeRecordIntoReorderBuffer().
+ */
+static void
+DecodeHeapOp(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
+{
+ uint8 info = buf->record.xl_info & XLOG_HEAP_OPMASK;
+ TransactionId xid = buf->record.xl_xid;
+ SnapBuild *builder = ctx->snapshot_builder;
+
+ /* no point in doing anything yet */
+ if (SnapBuildCurrentState(builder) < SNAPBUILD_FULL_SNAPSHOT)
+ return;
+
+ switch (info)
+ {
+ case XLOG_HEAP_INSERT:
+ if (SnapBuildProcessChange(builder, xid, buf->origptr))
+ DecodeInsert(ctx, buf);
+ break;
+
+ /*
+ * Treat HOT update as normal updates. There is no useful
+ * information in the fact that we could make it a HOT update
+ * locally and the WAL layout is compatible.
+ */
+ case XLOG_HEAP_HOT_UPDATE:
+ case XLOG_HEAP_UPDATE:
+ if (SnapBuildProcessChange(builder, xid, buf->origptr))
+ DecodeUpdate(ctx, buf);
+ break;
+
+ case XLOG_HEAP_DELETE:
+ if (SnapBuildProcessChange(builder, xid, buf->origptr))
+ DecodeDelete(ctx, buf);
+ break;
+
+ case XLOG_HEAP_NEWPAGE:
+ /*
+ * This is only used in places like indexams and CLUSTER which
+ * don't contain changes relevant for logical replication.
+ */
+ break;
+
+ case XLOG_HEAP_INPLACE:
+ /*
+ * Inplace updates are only ever performed on catalog tuples and
+ * can, per definition, not change tuple visibility. Since we
+ * don't decode catalog tuples, we're not interested in the
+ * record's contents.
+ *
+ * In-place updates can be used either by XID-bearing transactions
+ * (e.g. in CREATE INDEX CONCURRENTLY) or by XID-less
+ * transactions (e.g. VACUUM). In the former case, the commit
+ * record will include cache invalidations, so we mark the
+ * transaction as catalog modifying here. Currently that's
+ * redundant because the commit will do that as well, but once we
+ * support decoding in-progress relations, this will be important.
+ */
+ if (!TransactionIdIsValid(xid))
+ break;
+
+ SnapBuildProcessChange(builder, xid, buf->origptr);
+ ReorderBufferXidSetCatalogChanges(ctx->reorder, xid, buf->origptr);
+ break;
+
+ case XLOG_HEAP_LOCK:
+ /* we don't care about row level locks for now */
+ break;
+
+ default:
+ elog(ERROR, "unexpected RM_HEAP_ID record type: %u", info);
+ break;
+ }
+}
+
+/*
+ * Consolidated commit record handling between the different form of commit
+ * records.
+ */
+static void
+DecodeCommit(LogicalDecodingContext *ctx, XLogRecordBuffer *buf,
+ TransactionId xid, Oid dboid,
+ TimestampTz commit_time,
+ int nsubxacts, TransactionId *sub_xids,
+ int ninval_msgs, SharedInvalidationMessage *msgs)
+{
+ int i;
+
+ /*
+ * Process invalidation messages, even if we're not interested in the
+ * transaction's contents, since the various caches need to always be
+ * consistent.
+ */
+ if (ninval_msgs > 0)
+ {
+ ReorderBufferAddInvalidations(ctx->reorder, xid, buf->origptr,
+ ninval_msgs, msgs);
+ ReorderBufferXidSetCatalogChanges(ctx->reorder, xid, buf->origptr);
+ }
+
+ SnapBuildCommitTxn(ctx->snapshot_builder, buf->origptr, xid,
+ nsubxacts, sub_xids);
+
+ /* ----
+ * Check whether we are interested in this specific transaction, and tell
+ * the the reorderbuffer to forget the content of the (sub-)transactions
+ * if not.
+ *
+ * There basically two reasons we might not be interested in this
+ * transaction:
+ * 1) We might not be interested in decoding transactions up to this
+ * LSN. This can happen because we previously decoded it and now just
+ * are restarting or if we haven't assembled a consistent snapshot yet.
+ * 2) The transaction happened in another database.
+ *
+ * We can't just use ReorderBufferAbort() here, because we need to execute
+ * the transaction's invalidations. This currently won't be needed if
+ * we're just skipping over the transaction because currently we only do
+ * so during startup, to get to the first transaction the client needs. As
+ * we have reset the catalog caches before starting to read WAL, and we
+ * haven't yet touched any catalogs, there can't be anything to invalidate.
+ * But if we're "forgetting" this commit because it's it happened in
+ * another database, the invalidations might be important, because they
+ * could be for shared catalogs and we might have loaded data into the
+ * relevant syscaches.
+ * ---
+ */
+ if (SnapBuildXactNeedsSkip(ctx->snapshot_builder, buf->origptr) ||
+ (dboid != InvalidOid && dboid != ctx->slot->data.database))
+ {
+ for (i = 0; i < nsubxacts; i++)
+ {
+ ReorderBufferForget(ctx->reorder, *sub_xids, buf->origptr);
+ sub_xids++;
+ }
+ ReorderBufferForget(ctx->reorder, xid, buf->origptr);
+
+ return;
+ }
+
+ /* tell the reorderbuffer about the surviving subtransactions */
+ for (i = 0; i < nsubxacts; i++)
+ {
+ ReorderBufferCommitChild(ctx->reorder, xid, *sub_xids,
+ buf->origptr, buf->endptr);
+ sub_xids++;
+ }
+
+ /* replay actions of all transaction + subtransactions in order */
+ ReorderBufferCommit(ctx->reorder, xid, buf->origptr, buf->endptr,
+ commit_time);
+}
+
+/*
+ * Get the data from the various forms of abort records and pass it on to
+ * snapbuild.c and reorderbuffer.c
+ */
+static void
+DecodeAbort(LogicalDecodingContext *ctx, XLogRecPtr lsn, TransactionId xid,
+ TransactionId *sub_xids, int nsubxacts)
+{
+ int i;
+
+ SnapBuildAbortTxn(ctx->snapshot_builder, lsn, xid, nsubxacts, sub_xids);
+
+ for (i = 0; i < nsubxacts; i++)
+ {
+ ReorderBufferAbort(ctx->reorder, *sub_xids, lsn);
+ sub_xids++;
+ }
+
+ ReorderBufferAbort(ctx->reorder, xid, lsn);
+}
+
+/*
+ * Parse XLOG_HEAP_INSERT (not MULTI_INSERT!) records into tuplebufs.
+ *
+ * Deletes can contain the new tuple.
+ */
+static void
+DecodeInsert(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
+{
+ XLogRecord *r = &buf->record;
+ xl_heap_insert *xlrec;
+ ReorderBufferChange *change;
+
+ xlrec = (xl_heap_insert *) buf->record_data;
+
+ /* only interested in our database */
+ if (xlrec->target.node.dbNode != ctx->slot->data.database)
+ return;
+
+ change = ReorderBufferGetChange(ctx->reorder);
+ change->action = REORDER_BUFFER_CHANGE_INSERT;
+ memcpy(&change->tp.relnode, &xlrec->target.node, sizeof(RelFileNode));
+
+ if (xlrec->flags & XLOG_HEAP_CONTAINS_NEW_TUPLE)
+ {
+ Assert(r->xl_len > (SizeOfHeapInsert + SizeOfHeapHeader));
+
+ change->tp.newtuple = ReorderBufferGetTupleBuf(ctx->reorder);
+
+ DecodeXLogTuple((char *) xlrec + SizeOfHeapInsert,
+ r->xl_len - SizeOfHeapInsert,
+ change->tp.newtuple);
+ }
+
+ ReorderBufferQueueChange(ctx->reorder, r->xl_xid, buf->origptr, change);
+}
+
+/*
+ * Parse XLOG_HEAP_UPDATE and XLOG_HEAP_HOT_UPDATE, which have the same layout
+ * in the record, from wal into proper tuplebufs.
+ *
+ * Updates can possibly contain a new tuple and the old primary key.
+ */
+static void
+DecodeUpdate(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
+{
+ XLogRecord *r = &buf->record;
+ xl_heap_update *xlrec;
+ xl_heap_header_len *xlhdr;
+ ReorderBufferChange *change;
+ char *data;
+
+ xlrec = (xl_heap_update *) buf->record_data;
+ xlhdr = (xl_heap_header_len *) (buf->record_data + SizeOfHeapUpdate);
+
+ /* only interested in our database */
+ if (xlrec->target.node.dbNode != ctx->slot->data.database)
+ return;
+
+ change = ReorderBufferGetChange(ctx->reorder);
+ change->action = REORDER_BUFFER_CHANGE_UPDATE;
+ memcpy(&change->tp.relnode, &xlrec->target.node, sizeof(RelFileNode));
+
+ data = (char *) &xlhdr->header;
+
+ if (xlrec->flags & XLOG_HEAP_CONTAINS_NEW_TUPLE)
+ {
+ Assert(r->xl_len > (SizeOfHeapUpdate + SizeOfHeapHeaderLen));
+
+ change->tp.newtuple = ReorderBufferGetTupleBuf(ctx->reorder);
+
+ DecodeXLogTuple(data,
+ xlhdr->t_len + SizeOfHeapHeader,
+ change->tp.newtuple);
+ /* skip over the rest of the tuple header */
+ data += SizeOfHeapHeader;
+ /* skip over the tuple data */
+ data += xlhdr->t_len;
+ }
+
+ if (xlrec->flags & XLOG_HEAP_CONTAINS_OLD)
+ {
+ xlhdr = (xl_heap_header_len *) data;
+ change->tp.oldtuple = ReorderBufferGetTupleBuf(ctx->reorder);
+ DecodeXLogTuple((char *) &xlhdr->header,
+ xlhdr->t_len + SizeOfHeapHeader,
+ change->tp.oldtuple);
+ data = (char *) &xlhdr->header;
+ data += SizeOfHeapHeader;
+ data += xlhdr->t_len;
+ }
+
+ ReorderBufferQueueChange(ctx->reorder, r->xl_xid, buf->origptr, change);
+}
+
+/*
+ * Parse XLOG_HEAP_DELETE from wal into proper tuplebufs.
+ *
+ * Deletes can possibly contain the old primary key.
+ */
+static void
+DecodeDelete(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
+{
+ XLogRecord *r = &buf->record;
+ xl_heap_delete *xlrec;
+ ReorderBufferChange *change;
+
+ xlrec = (xl_heap_delete *) buf->record_data;
+
+ /* only interested in our database */
+ if (xlrec->target.node.dbNode != ctx->slot->data.database)
+ return;
+
+ change = ReorderBufferGetChange(ctx->reorder);
+ change->action = REORDER_BUFFER_CHANGE_DELETE;
+
+ memcpy(&change->tp.relnode, &xlrec->target.node, sizeof(RelFileNode));
+
+ /* old primary key stored */
+ if (xlrec->flags & XLOG_HEAP_CONTAINS_OLD)
+ {
+ Assert(r->xl_len > (SizeOfHeapDelete + SizeOfHeapHeader));
+
+ change->tp.oldtuple = ReorderBufferGetTupleBuf(ctx->reorder);
+
+ DecodeXLogTuple((char *) xlrec + SizeOfHeapDelete,
+ r->xl_len - SizeOfHeapDelete,
+ change->tp.oldtuple);
+ }
+ ReorderBufferQueueChange(ctx->reorder, r->xl_xid, buf->origptr, change);
+}
+
+/*
+ * Decode XLOG_HEAP2_MULTI_INSERT_insert record into multiple tuplebufs.
+ *
+ * Currently MULTI_INSERT will always contain the full tuples.
+ */
+static void
+DecodeMultiInsert(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
+{
+ XLogRecord *r = &buf->record;
+ xl_heap_multi_insert *xlrec;
+ int i;
+ char *data;
+ bool isinit = (r->xl_info & XLOG_HEAP_INIT_PAGE) != 0;
+
+ xlrec = (xl_heap_multi_insert *) buf->record_data;
+
+ /* only interested in our database */
+ if (xlrec->node.dbNode != ctx->slot->data.database)
+ return;
+
+ data = buf->record_data + SizeOfHeapMultiInsert;
+
+ /*
+ * OffsetNumbers (which are not of interest to us) are stored when
+ * XLOG_HEAP_INIT_PAGE is not set -- skip over them.
+ */
+ if (!isinit)
+ data += sizeof(OffsetNumber) * xlrec->ntuples;
+
+ for (i = 0; i < xlrec->ntuples; i++)
+ {
+ ReorderBufferChange *change;
+ xl_multi_insert_tuple *xlhdr;
+ int datalen;
+ ReorderBufferTupleBuf *tuple;
+
+ change = ReorderBufferGetChange(ctx->reorder);
+ change->action = REORDER_BUFFER_CHANGE_INSERT;
+ memcpy(&change->tp.relnode, &xlrec->node, sizeof(RelFileNode));
+
+ /*
+ * CONTAINS_NEW_TUPLE will always be set currently as multi_insert
+ * isn't used for catalogs, but better be future proof.
+ *
+ * We decode the tuple in pretty much the same way as DecodeXLogTuple,
+ * but since the layout is slightly different, we can't use it here.
+ */
+ if (xlrec->flags & XLOG_HEAP_CONTAINS_NEW_TUPLE)
+ {
+ change->tp.newtuple = ReorderBufferGetTupleBuf(ctx->reorder);
+
+ tuple = change->tp.newtuple;
+
+ /* not a disk based tuple */
+ ItemPointerSetInvalid(&tuple->tuple.t_self);
+
+ xlhdr = (xl_multi_insert_tuple *) SHORTALIGN(data);
+ data = ((char *) xlhdr) + SizeOfMultiInsertTuple;
+ datalen = xlhdr->datalen;
+
+ /*
+ * We can only figure this out after reassembling the
+ * transactions.
+ */
+ tuple->tuple.t_tableOid = InvalidOid;
+ tuple->tuple.t_data = &tuple->header;
+ tuple->tuple.t_len = datalen
+ + offsetof(HeapTupleHeaderData, t_bits);
+
+ memset(&tuple->header, 0, sizeof(HeapTupleHeaderData));
+
+ memcpy((char *) &tuple->header
+ + offsetof(HeapTupleHeaderData, t_bits),
+ (char *) data,
+ datalen);
+ data += datalen;
+
+ tuple->header.t_infomask = xlhdr->t_infomask;
+ tuple->header.t_infomask2 = xlhdr->t_infomask2;
+ tuple->header.t_hoff = xlhdr->t_hoff;
+ }
+
+ ReorderBufferQueueChange(ctx->reorder, r->xl_xid,
+ buf->origptr, change);
+ }
+}
+
+/*
+ * Read a HeapTuple as WAL logged by heap_insert, heap_update and heap_delete
+ * (but not by heap_multi_insert) into a tuplebuf.
+ *
+ * The size 'len' and the pointer 'data' in the record need to be
+ * computed outside as they are record specific.
+ */
+static void
+DecodeXLogTuple(char *data, Size len, ReorderBufferTupleBuf *tuple)
+{
+ xl_heap_header xlhdr;
+ int datalen = len - SizeOfHeapHeader;
+
+ Assert(datalen >= 0);
+ Assert(datalen <= MaxHeapTupleSize);
+
+ tuple->tuple.t_len = datalen + offsetof(HeapTupleHeaderData, t_bits);
+
+ /* not a disk based tuple */
+ ItemPointerSetInvalid(&tuple->tuple.t_self);
+
+ /* we can only figure this out after reassembling the transactions */
+ tuple->tuple.t_tableOid = InvalidOid;
+ tuple->tuple.t_data = &tuple->header;
+
+ /* data is not stored aligned, copy to aligned storage */
+ memcpy((char *) &xlhdr,
+ data,
+ SizeOfHeapHeader);
+
+ memset(&tuple->header, 0, sizeof(HeapTupleHeaderData));
+
+ memcpy((char *) &tuple->header + offsetof(HeapTupleHeaderData, t_bits),
+ data + SizeOfHeapHeader,
+ datalen);
+
+ tuple->header.t_infomask = xlhdr.t_infomask;
+ tuple->header.t_infomask2 = xlhdr.t_infomask2;
+ tuple->header.t_hoff = xlhdr.t_hoff;
+}
--- /dev/null
+/*-------------------------------------------------------------------------
+ * logical.c
+ * PostgreSQL logical decoding coordination
+ *
+ * Copyright (c) 2012-2014, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ * src/backend/replication/logical/logical.c
+ *
+ * NOTES
+ * This file coordinates interaction between the various modules that
+ * together providethe logical decoding, primarily by providing so
+ * called LogicalDecodingContexts. The goal is to encapsulate most of the
+ * internal complexity for consumers of logical decoding, so they can
+ * create and consume a changestream with a low amount of code.
+ *
+ * The idea is that a consumer provides three callbacks, one to read WAL,
+ * one to prepare a data write, and a final one for actually writing since
+ * their implementation depends on the type of consumer. Check
+ * logicalfunc.c for an example implementations of a fairly simple consumer
+ * and a implementation of a WAL reading callback that's suitable for
+ * simpler consumers.
+ *-------------------------------------------------------------------------
+ */
+
+#include "postgres.h"
+
+#include
+#include
+
+#include "miscadmin.h"
+
+#include "access/xact.h"
+
+#include "replication/decode.h"
+#include "replication/logical.h"
+#include "replication/reorderbuffer.h"
+#include "replication/snapbuild.h"
+
+#include "storage/proc.h"
+#include "storage/procarray.h"
+
+#include "utils/memutils.h"
+
+/* data for errcontext callback */
+typedef struct LogicalErrorCallbackState
+{
+ LogicalDecodingContext *ctx;
+ const char *callback_name;
+ XLogRecPtr report_location;
+} LogicalErrorCallbackState;
+
+/* wrappers around output plugin callbacks */
+static void output_plugin_error_callback(void *arg);
+static void startup_cb_wrapper(LogicalDecodingContext *ctx, OutputPluginOptions *opt,
+ bool is_init);
+static void shutdown_cb_wrapper(LogicalDecodingContext *ctx);
+static void begin_cb_wrapper(ReorderBuffer *cache, ReorderBufferTXN *txn);
+static void commit_cb_wrapper(ReorderBuffer *cache, ReorderBufferTXN *txn,
+ XLogRecPtr commit_lsn);
+static void change_cb_wrapper(ReorderBuffer *cache, ReorderBufferTXN *txn,
+ Relation relation, ReorderBufferChange *change);
+
+static void LoadOutputPlugin(OutputPluginCallbacks *callbacks, char *plugin);
+
+/*
+ * Make sure the current settings & environment are capable of doing logical
+ * decoding.
+ */
+void
+CheckLogicalDecodingRequirements(void)
+{
+ CheckSlotRequirements();
+
+ if (wal_level < WAL_LEVEL_LOGICAL)
+ ereport(ERROR,
+ (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
+ errmsg("logical decoding requires wal_level >= logical")));
+
+ if (MyDatabaseId == InvalidOid)
+ ereport(ERROR,
+ (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
+ errmsg("logical decoding requires a database connection")));
+
+ /* ----
+ * TODO: We got to change that someday soon...
+ *
+ * There's basically three things missing to allow this:
+ * 1) We need to be able to correctly and quickly identify the timeline a
+ * LSN belongs to
+ * 2) We need to force hot_standby_feedback to be enabled at all times so
+ * the primary cannot remove rows we need.
+ * 3) support dropping replication slots referring to a database, in
+ * dbase_redo. There can't be any active ones due to HS recovery
+ * conflicts, so that should be relatively easy.
+ * ----
+ */
+ if (RecoveryInProgress())
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("logical decoding cannot be used while in recovery")));
+}
+
+/*
+ * Helper function for CreateInitialDecodingContext() and
+ * CreateDecodingContext() performing common tasks.
+ */
+static LogicalDecodingContext *
+StartupDecodingContext(List *output_plugin_options,
+ XLogRecPtr start_lsn,
+ TransactionId xmin_horizon,
+ XLogPageReadCB read_page,
+ LogicalOutputPluginWriterPrepareWrite prepare_write,
+ LogicalOutputPluginWriterWrite do_write)
+{
+ ReplicationSlot *slot;
+ MemoryContext context, old_context;
+ LogicalDecodingContext *ctx;
+
+ /* shorter lines... */
+ slot = MyReplicationSlot;
+
+ context = AllocSetContextCreate(CurrentMemoryContext,
+ "Changeset Extraction Context",
+ ALLOCSET_DEFAULT_MINSIZE,
+ ALLOCSET_DEFAULT_INITSIZE,
+ ALLOCSET_DEFAULT_MAXSIZE);
+ old_context = MemoryContextSwitchTo(context);
+ ctx = palloc0(sizeof(LogicalDecodingContext));
+
+ ctx->context = context;
+
+ /* (re-)load output plugins, so we detect a bad (removed) output plugin now. */
+ LoadOutputPlugin(&ctx->callbacks, NameStr(slot->data.plugin));
+
+ /*
+ * Now that the slot's xmin has been set, we can announce ourselves as a
+ * logical decoding backend which doesn't need to be checked individually
+ * when computing the xmin horizon because the xmin is enforced via
+ * replication slots.
+ */
+ LWLockAcquire(ProcArrayLock, LW_EXCLUSIVE);
+ MyPgXact->vacuumFlags |= PROC_IN_LOGICAL_DECODING;
+ LWLockRelease(ProcArrayLock);
+
+ ctx->slot = slot;
+
+ ctx->reader = XLogReaderAllocate(read_page, ctx);
+ ctx->reader->private_data = ctx;
+
+ ctx->reorder = ReorderBufferAllocate();
+ ctx->snapshot_builder =
+ AllocateSnapshotBuilder(ctx->reorder, xmin_horizon, start_lsn);
+
+ ctx->reorder->private_data = ctx;
+
+ /* wrap output plugin callbacks, so we can add error context information */
+ ctx->reorder->begin = begin_cb_wrapper;
+ ctx->reorder->apply_change = change_cb_wrapper;
+ ctx->reorder->commit = commit_cb_wrapper;
+
+ ctx->out = makeStringInfo();
+ ctx->prepare_write = prepare_write;
+ ctx->write = do_write;
+
+ ctx->output_plugin_options = output_plugin_options;
+
+ MemoryContextSwitchTo(old_context);
+
+ return ctx;
+}
+
+/*
+ * Create a new decoding context, for a new logical slot.
+ *
+ * plugin contains the name of the output plugin
+ * output_plugin_options contains options passed to the output plugin
+ * read_page, prepare_write, do_write are callbacks that have to be filled to
+ * perform the use-case dependent, actual, work.
+ *
+ * Needs to be called while in a memory context that's at least as long lived
+ * as the the decoding context because further memory contexts will be created
+ * inside it.
+ *
+ * Returns an initialized decoding context after calling the output plugin's
+ * startup function.
+ */
+LogicalDecodingContext *
+CreateInitDecodingContext(char *plugin,
+ List *output_plugin_options,
+ XLogPageReadCB read_page,
+ LogicalOutputPluginWriterPrepareWrite prepare_write,
+ LogicalOutputPluginWriterWrite do_write)
+{
+ TransactionId xmin_horizon = InvalidTransactionId;
+ ReplicationSlot *slot;
+ LogicalDecodingContext *ctx;
+ MemoryContext old_context;
+
+ /* shorter lines... */
+ slot = MyReplicationSlot;
+
+ /* first some sanity checks that are unlikely to be violated */
+ if (slot == NULL)
+ elog(ERROR, "cannot perform logical decoding without a acquired slot");
+
+ if (plugin == NULL)
+ elog(ERROR, "cannot initialize logical decoding without a specified plugin");
+
+ /* Make sure the passed slot is suitable. These are user facing errors. */
+ if (slot->data.database == InvalidOid)
+ ereport(ERROR,
+ (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
+ errmsg("cannot use physical replication slot created for logical decoding")));
+
+ if (slot->data.database != MyDatabaseId)
+ ereport(ERROR,
+ (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
+ errmsg("replication slot \"%s\" was not created in this database",
+ NameStr(slot->data.name))));
+
+ if (IsTransactionState() &&
+ GetTopTransactionIdIfAny() != InvalidTransactionId)
+ ereport(ERROR,
+ (errcode(ERRCODE_ACTIVE_SQL_TRANSACTION),
+ errmsg("cannot create logical replication slot in transaction that has performed writes")));
+
+ /* register output plugin name with slot */
+ SpinLockAcquire(&slot->mutex);
+ strncpy(NameStr(slot->data.plugin), plugin,
+ NAMEDATALEN);
+ NameStr(slot->data.plugin)[NAMEDATALEN - 1] = '\0';
+ SpinLockRelease(&slot->mutex);
+
+ /*
+ * The replication slot mechanism is used to prevent removal of required
+ * WAL. As there is no interlock between this and checkpoints required WAL
+ * could be removed before ReplicationSlotsComputeRequiredLSN() has been
+ * called to prevent that. In the very unlikely case that this happens
+ * we'll just retry.
+ */
+ while (true)
+ {
+ XLogSegNo segno;
+
+ /*
+ * Let's start with enough information if we can, so log a standby
+ * snapshot and start decoding at exactly that position.
+ */
+ if (!RecoveryInProgress())
+ {
+ XLogRecPtr flushptr;
+
+ /* start at current insert position*/
+ slot->data.restart_lsn = GetXLogInsertRecPtr();
+
+ /* make sure we have enough information to start */
+ flushptr = LogStandbySnapshot();
+
+ /* and make sure it's fsynced to disk */
+ XLogFlush(flushptr);
+ }
+ else
+ slot->data.restart_lsn = GetRedoRecPtr();
+
+ /* prevent WAL removal as fast as possible */
+ ReplicationSlotsComputeRequiredLSN();
+
+ /*
+ * If all required WAL is still there, great, otherwise retry. The
+ * slot should prevent further removal of WAL, unless there's a
+ * concurrent ReplicationSlotsComputeRequiredLSN() after we've written
+ * the new restart_lsn above, so normally we should never need to loop
+ * more than twice.
+ */
+ XLByteToSeg(slot->data.restart_lsn, segno);
+ if (XLogGetLastRemovedSegno() < segno)
+ break;
+ }
+
+
+ /* ----
+ * This is a bit tricky: We need to determine a safe xmin horizon to start
+ * decoding from, to avoid starting from a running xacts record referring
+ * to xids whose rows have been vacuumed or pruned
+ * already. GetOldestSafeDecodingTransactionId() returns such a value, but
+ * without further interlock it's return value might immediately be out of
+ * date.
+ *
+ * So we have to acquire the ProcArrayLock to prevent computation of new
+ * xmin horizons by other backends, get the safe decoding xid, and inform
+ * the slot machinery about the new limit. Once that's done the
+ * ProcArrayLock can be be released as the slot machinery now is
+ * protecting against vacuum.
+ * ----
+ */
+ LWLockAcquire(ProcArrayLock, LW_EXCLUSIVE);
+
+ slot->effective_catalog_xmin = GetOldestSafeDecodingTransactionId();
+ slot->data.catalog_xmin = slot->effective_catalog_xmin;
+
+ ReplicationSlotsComputeRequiredXmin(true);
+
+ LWLockRelease(ProcArrayLock);
+
+ /*
+ * tell the snapshot builder to only assemble snapshot once reaching
+ * the a running_xact's record with the respective xmin.
+ */
+ xmin_horizon = slot->data.catalog_xmin;
+
+ ReplicationSlotMarkDirty();
+ ReplicationSlotSave();
+
+ ctx = StartupDecodingContext(NIL, InvalidXLogRecPtr, xmin_horizon,
+ read_page, prepare_write, do_write);
+
+ /* call output plugin initialization callback */
+ old_context = MemoryContextSwitchTo(ctx->context);
+ if (ctx->callbacks.startup_cb != NULL)
+ startup_cb_wrapper(ctx, &ctx->options, true);
+ MemoryContextSwitchTo(old_context);
+
+ return ctx;
+}
+
+/*
+ * Create a new decoding context, for a logical slot that has previously been
+ * used already.
+ *
+ * start_lsn contains the LSN of the last received data or InvalidXLogRecPtr
+ * output_plugin_options contains options passed to the output plugin
+ * read_page, prepare_write, do_write are callbacks that have to be filled to
+ * perform the use-case dependent, actual, work.
+ *
+ * Needs to be called while in a memory context that's at least as long lived
+ * as the the decoding context because further memory contexts will be created
+ * inside it.
+ *
+ * Returns an initialized decoding context after calling the output plugin's
+ * startup function.
+ */
+LogicalDecodingContext *
+CreateDecodingContext(XLogRecPtr start_lsn,
+ List *output_plugin_options,
+ XLogPageReadCB read_page,
+ LogicalOutputPluginWriterPrepareWrite prepare_write,
+ LogicalOutputPluginWriterWrite do_write)
+{
+ LogicalDecodingContext *ctx;
+ ReplicationSlot *slot;
+ MemoryContext old_context;
+
+ /* shorter lines... */
+ slot = MyReplicationSlot;
+
+ /* first some sanity checks that are unlikely to be violated */
+ if (slot == NULL)
+ elog(ERROR, "cannot perform logical decoding without a acquired slot");
+
+ /* make sure the passed slot is suitable, these are user facing errors */
+ if (slot->data.database == InvalidOid)
+ ereport(ERROR,
+ (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
+ (errmsg("cannot use physical replication slot for logical decoding"))));
+
+ if (slot->data.database != MyDatabaseId)
+ ereport(ERROR,
+ (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
+ (errmsg("replication slot \"%s\" was not created in this database",
+ NameStr(slot->data.name)))));
+
+ if (start_lsn == InvalidXLogRecPtr)
+ {
+ /* continue from last position */
+ start_lsn = slot->data.confirmed_flush;
+ }
+ else if (start_lsn < slot->data.confirmed_flush)
+ {
+ /*
+ * It might seem like we should error out in this case, but it's
+ * pretty common for a client to acknowledge a LSN it doesn't have to
+ * do anything for, and thus didn't store persistently, because the
+ * xlog records didn't result in anything relevant for logical
+ * decoding. Clients have to be able to do that to support
+ * synchronous replication.
+ */
+ start_lsn = slot->data.confirmed_flush;
+ elog(DEBUG1, "cannot stream from %X/%X, minimum is %X/%X, forwarding",
+ (uint32)(start_lsn >> 32), (uint32)start_lsn,
+ (uint32)(slot->data.confirmed_flush >> 32),
+ (uint32)slot->data.confirmed_flush);
+ }
+
+ ctx = StartupDecodingContext(output_plugin_options,
+ start_lsn, InvalidTransactionId,
+ read_page, prepare_write, do_write);
+
+ /* call output plugin initialization callback */
+ old_context = MemoryContextSwitchTo(ctx->context);
+ if (ctx->callbacks.startup_cb != NULL)
+ startup_cb_wrapper(ctx, &ctx->options, true);
+ MemoryContextSwitchTo(old_context);
+
+ ereport(LOG,
+ (errmsg("starting logical decoding for slot %s",
+ NameStr(slot->data.name)),
+ errdetail("streaming transactions committing after %X/%X, reading WAL from %X/%X",
+ (uint32)(slot->data.confirmed_flush >> 32),
+ (uint32)slot->data.confirmed_flush,
+ (uint32)(slot->data.restart_lsn >> 32),
+ (uint32)slot->data.restart_lsn)));
+
+ return ctx;
+}
+
+/*
+ * Returns true if an consistent initial decoding snapshot has been built.
+ */
+bool
+DecodingContextReady(LogicalDecodingContext *ctx)
+{
+ return SnapBuildCurrentState(ctx->snapshot_builder) == SNAPBUILD_CONSISTENT;
+}
+
+/*
+ * Read from the decoding slot, until it is ready to start extracting changes.
+ */
+void
+DecodingContextFindStartpoint(LogicalDecodingContext *ctx)
+{
+ XLogRecPtr startptr;
+
+ /* Initialize from where to start reading WAL. */
+ startptr = ctx->slot->data.restart_lsn;
+
+ elog(DEBUG1, "searching for logical decoding starting point, starting at %X/%X",
+ (uint32)(ctx->slot->data.restart_lsn >> 32),
+ (uint32)ctx->slot->data.restart_lsn);
+
+ /* Wait for a consistent starting point */
+ for (;;)
+ {
+ XLogRecord *record;
+ char *err = NULL;
+
+ /*
+ * If the caller requires that interrupts be checked, the read_page
+ * callback should do so, as those will often wait.
+ */
+
+ /* the read_page callback waits for new WAL */
+ record = XLogReadRecord(ctx->reader, startptr, &err);
+ if (err)
+ elog(ERROR, "%s", err);
+
+ Assert(record);
+
+ startptr = InvalidXLogRecPtr;
+
+ LogicalDecodingProcessRecord(ctx, record);
+
+ /* only continue till we found a consistent spot */
+ if (DecodingContextReady(ctx))
+ break;
+ }
+
+ ctx->slot->data.confirmed_flush = ctx->reader->EndRecPtr;
+}
+
+/*
+ * Free a previously allocated decoding context, invoking the shutdown
+ * callback if necessary.
+ */
+void
+FreeDecodingContext(LogicalDecodingContext *ctx)
+{
+ if (ctx->callbacks.shutdown_cb != NULL)
+ shutdown_cb_wrapper(ctx);
+
+ ReorderBufferFree(ctx->reorder);
+ FreeSnapshotBuilder(ctx->snapshot_builder);
+ XLogReaderFree(ctx->reader);
+ MemoryContextDelete(ctx->context);
+}
+
+/*
+ * Prepare a write using the context's output routine.
+ */
+void
+OutputPluginPrepareWrite(struct LogicalDecodingContext *ctx, bool last_write)
+{
+ if (!ctx->accept_writes)
+ elog(ERROR, "writes are only accepted in commit, begin and change callbacks");
+
+ ctx->prepare_write(ctx, ctx->write_location, ctx->write_xid, last_write);
+ ctx->prepared_write = true;
+}
+
+/*
+ * Perform a write using the context's output routine.
+ */
+void
+OutputPluginWrite(struct LogicalDecodingContext *ctx, bool last_write)
+{
+ if (!ctx->prepared_write)
+ elog(ERROR, "OutputPluginPrepareWrite needs to be called before OutputPluginWrite");
+
+ ctx->write(ctx, ctx->write_location, ctx->write_xid, last_write);
+ ctx->prepared_write = false;
+}
+
+/*
+ * Load the output plugin, lookup its output plugin init function, and check
+ * that it provides the required callbacks.
+ */
+static void
+LoadOutputPlugin(OutputPluginCallbacks *callbacks, char *plugin)
+{
+ LogicalOutputPluginInit plugin_init;
+
+ plugin_init = (LogicalOutputPluginInit)
+ load_external_function(plugin, "_PG_output_plugin_init", false, NULL);
+
+ if (plugin_init == NULL)
+ elog(ERROR, "output plugins have to declare the _PG_output_plugin_init symbol");
+
+ /* ask the output plugin to fill the callback struct */
+ plugin_init(callbacks);
+
+ if (callbacks->begin_cb == NULL)
+ elog(ERROR, "output plugins have to register a begin callback");
+ if (callbacks->change_cb == NULL)
+ elog(ERROR, "output plugins have to register a change callback");
+ if (callbacks->commit_cb == NULL)
+ elog(ERROR, "output plugins have to register a commit callback");
+}
+
+static void
+output_plugin_error_callback(void *arg)
+{
+ LogicalErrorCallbackState *state = (LogicalErrorCallbackState *) arg;
+ /* not all callbacks have an associated LSN */
+ if (state->report_location != InvalidXLogRecPtr)
+ errcontext("slot \"%s\", output plugin \"%s\", in the %s callback, associated LSN %X/%X",
+ NameStr(state->ctx->slot->data.name),
+ NameStr(state->ctx->slot->data.plugin),
+ state->callback_name,
+ (uint32)(state->report_location >> 32),
+ (uint32)state->report_location);
+ else
+ errcontext("slot \"%s\", output plugin \"%s\", in the %s callback",
+ NameStr(state->ctx->slot->data.name),
+ NameStr(state->ctx->slot->data.plugin),
+ state->callback_name);
+}
+
+static void
+startup_cb_wrapper(LogicalDecodingContext *ctx, OutputPluginOptions *opt, bool is_init)
+{
+ LogicalErrorCallbackState state;
+ ErrorContextCallback errcallback;
+
+ /* Push callback + info on the error context stack */
+ state.ctx = ctx;
+ state.callback_name = "startup";
+ state.report_location = InvalidXLogRecPtr;
+ errcallback.callback = output_plugin_error_callback;
+ errcallback.arg = (void *) &state;
+ errcallback.previous = error_context_stack;
+ error_context_stack = &errcallback;
+
+ /* set output state */
+ ctx->accept_writes = false;
+
+ /* do the actual work: call callback */
+ ctx->callbacks.startup_cb(ctx, opt, is_init);
+
+ /* Pop the error context stack */
+ error_context_stack = errcallback.previous;
+}
+
+static void
+shutdown_cb_wrapper(LogicalDecodingContext *ctx)
+{
+ LogicalErrorCallbackState state;
+ ErrorContextCallback errcallback;
+
+ /* Push callback + info on the error context stack */
+ state.ctx = ctx;
+ state.callback_name = "shutdown";
+ state.report_location = InvalidXLogRecPtr;
+ errcallback.callback = output_plugin_error_callback;
+ errcallback.arg = (void *) &state;
+ errcallback.previous = error_context_stack;
+ error_context_stack = &errcallback;
+
+ /* set output state */
+ ctx->accept_writes = false;
+
+ /* do the actual work: call callback */
+ ctx->callbacks.shutdown_cb(ctx);
+
+ /* Pop the error context stack */
+ error_context_stack = errcallback.previous;
+}
+
+
+/*
+ * Callbacks for ReorderBuffer which add in some more information and then call
+ * output_plugin.h plugins.
+ */
+static void
+begin_cb_wrapper(ReorderBuffer *cache, ReorderBufferTXN *txn)
+{
+ LogicalDecodingContext *ctx = cache->private_data;
+ LogicalErrorCallbackState state;
+ ErrorContextCallback errcallback;
+
+ /* Push callback + info on the error context stack */
+ state.ctx = ctx;
+ state.callback_name = "begin";
+ state.report_location = txn->first_lsn;
+ errcallback.callback = output_plugin_error_callback;
+ errcallback.arg = (void *) &state;
+ errcallback.previous = error_context_stack;
+ error_context_stack = &errcallback;
+
+ /* set output state */
+ ctx->accept_writes = true;
+ ctx->write_xid = txn->xid;
+ ctx->write_location = txn->first_lsn;
+
+ /* do the actual work: call callback */
+ ctx->callbacks.begin_cb(ctx, txn);
+
+ /* Pop the error context stack */
+ error_context_stack = errcallback.previous;
+}
+
+static void
+commit_cb_wrapper(ReorderBuffer *cache, ReorderBufferTXN *txn,
+ XLogRecPtr commit_lsn)
+{
+ LogicalDecodingContext *ctx = cache->private_data;
+ LogicalErrorCallbackState state;
+ ErrorContextCallback errcallback;
+
+ /* Push callback + info on the error context stack */
+ state.ctx = ctx;
+ state.callback_name = "commit";
+ state.report_location = txn->final_lsn; /* beginning of commit record */
+ errcallback.callback = output_plugin_error_callback;
+ errcallback.arg = (void *) &state;
+ errcallback.previous = error_context_stack;
+ error_context_stack = &errcallback;
+
+ /* set output state */
+ ctx->accept_writes = true;
+ ctx->write_xid = txn->xid;
+ ctx->write_location = txn->end_lsn; /* points to the end of the record */
+
+ /* do the actual work: call callback */
+ ctx->callbacks.commit_cb(ctx, txn, commit_lsn);
+
+ /* Pop the error context stack */
+ error_context_stack = errcallback.previous;
+}
+
+static void
+change_cb_wrapper(ReorderBuffer *cache, ReorderBufferTXN *txn,
+ Relation relation, ReorderBufferChange *change)
+{
+ LogicalDecodingContext *ctx = cache->private_data;
+ LogicalErrorCallbackState state;
+ ErrorContextCallback errcallback;
+
+ /* Push callback + info on the error context stack */
+ state.ctx = ctx;
+ state.callback_name = "change";
+ state.report_location = change->lsn;
+ errcallback.callback = output_plugin_error_callback;
+ errcallback.arg = (void *) &state;
+ errcallback.previous = error_context_stack;
+ error_context_stack = &errcallback;
+
+ /* set output state */
+ ctx->accept_writes = true;
+ ctx->write_xid = txn->xid;
+ /*
+ * report this change's lsn so replies from clients can give an up2date
+ * answer. This won't ever be enough (and shouldn't be!) to confirm
+ * receipt of this transaction, but it might allow another transaction's
+ * commit to be confirmed with one message.
+ */
+ ctx->write_location = change->lsn;
+
+ ctx->callbacks.change_cb(ctx, txn, relation, change);
+
+ /* Pop the error context stack */
+ error_context_stack = errcallback.previous;
+}
+
+/*
+ * Set the required catalog xmin horizon for historic snapshots in the current
+ * replication slot.
+ *
+ * Note that in the most cases, we won't be able to immediately use the xmin
+ * to increase the xmin horizon, we need to wait till the client has confirmed
+ * receiving current_lsn with LogicalConfirmReceivedLocation().
+ */
+void
+LogicalIncreaseXminForSlot(XLogRecPtr current_lsn, TransactionId xmin)
+{
+ bool updated_xmin = false;
+ ReplicationSlot *slot;
+
+ slot = MyReplicationSlot;
+
+ Assert(slot != NULL);
+
+ SpinLockAcquire(&slot->mutex);
+
+ /*
+ * don't overwrite if we already have a newer xmin. This can
+ * happen if we restart decoding in a slot.
+ */
+ if (TransactionIdPrecedesOrEquals(xmin, slot->data.catalog_xmin))
+ {
+ }
+ /*
+ * If the client has already confirmed up to this lsn, we directly
+ * can mark this as accepted. This can happen if we restart
+ * decoding in a slot.
+ */
+ else if (current_lsn <= slot->data.confirmed_flush)
+ {
+ slot->candidate_catalog_xmin = xmin;
+ slot->candidate_xmin_lsn = current_lsn;
+
+ /* our candidate can directly be used */
+ updated_xmin = true;
+ }
+ /*
+ * Only increase if the previous values have been applied, otherwise we
+ * might never end up updating if the receiver acks too slowly.
+ */
+ else if (slot->candidate_xmin_lsn == InvalidXLogRecPtr)
+ {
+ slot->candidate_catalog_xmin = xmin;
+ slot->candidate_xmin_lsn = current_lsn;
+ }
+ SpinLockRelease(&slot->mutex);
+
+ /* candidate already valid with the current flush position, apply */
+ if (updated_xmin)
+ LogicalConfirmReceivedLocation(slot->data.confirmed_flush);
+}
+
+/*
+ * Mark the minimal LSN (restart_lsn) we need to read to replay all
+ * transactions that have not yet committed at current_lsn.
+ *
+ * Just like IncreaseRestartDecodingForSlot this nly takes effect when the
+ * client has confirmed to have received current_lsn.
+ */
+void
+LogicalIncreaseRestartDecodingForSlot(XLogRecPtr current_lsn, XLogRecPtr restart_lsn)
+{
+ bool updated_lsn = false;
+ ReplicationSlot *slot;
+
+ slot = MyReplicationSlot;
+
+ Assert(slot != NULL);
+ Assert(restart_lsn != InvalidXLogRecPtr);
+ Assert(current_lsn != InvalidXLogRecPtr);
+
+ SpinLockAcquire(&slot->mutex);
+
+ /* don't overwrite if have a newer restart lsn*/
+ if (restart_lsn <= slot->data.restart_lsn)
+ {
+ }
+ /*
+ * We might have already flushed far enough to directly accept this lsn, in
+ * this case there is no need to check for existing candidate LSNs
+ */
+ else if (current_lsn <= slot->data.confirmed_flush)
+ {
+ slot->candidate_restart_valid = current_lsn;
+ slot->candidate_restart_lsn = restart_lsn;
+
+ /* our candidate can directly be used */
+ updated_lsn = true;
+ }
+ /*
+ * Only increase if the previous values have been applied, otherwise we
+ * might never end up updating if the receiver acks too slowly. A missed
+ * value here will just cause some extra effort after reconnecting.
+ */
+ if (slot->candidate_restart_valid == InvalidXLogRecPtr)
+ {
+ slot->candidate_restart_valid = current_lsn;
+ slot->candidate_restart_lsn = restart_lsn;
+
+ elog(DEBUG1, "got new restart lsn %X/%X at %X/%X",
+ (uint32) (restart_lsn >> 32), (uint32) restart_lsn,
+ (uint32) (current_lsn >> 32), (uint32) current_lsn);
+ }
+ else
+ {
+ elog(DEBUG1, "failed to increase restart lsn: proposed %X/%X, after %X/%X, current candidate %X/%X, current after %X/%X, flushed up to %X/%X",
+ (uint32) (restart_lsn >> 32), (uint32) restart_lsn,
+ (uint32) (current_lsn >> 32), (uint32) current_lsn,
+ (uint32) (slot->candidate_restart_lsn >> 32),
+ (uint32) slot->candidate_restart_lsn,
+ (uint32) (slot->candidate_restart_valid >> 32),
+ (uint32) slot->candidate_restart_valid,
+ (uint32) (slot->data.confirmed_flush >> 32),
+ (uint32) slot->data.confirmed_flush
+ );
+ }
+ SpinLockRelease(&slot->mutex);
+
+ /* candidates are already valid with the current flush position, apply */
+ if (updated_lsn)
+ LogicalConfirmReceivedLocation(slot->data.confirmed_flush);
+}
+
+/*
+ * Handle a consumer's conformation having received all changes up to lsn.
+ */
+void
+LogicalConfirmReceivedLocation(XLogRecPtr lsn)
+{
+ Assert(lsn != InvalidXLogRecPtr);
+
+ /* Do an unlocked check for candidate_lsn first. */
+ if (MyReplicationSlot->candidate_xmin_lsn != InvalidXLogRecPtr ||
+ MyReplicationSlot->candidate_restart_valid != InvalidXLogRecPtr)
+ {
+ bool updated_xmin = false;
+ bool updated_restart = false;
+
+ /* use volatile pointer to prevent code rearrangement */
+ volatile ReplicationSlot *slot = MyReplicationSlot;
+
+ SpinLockAcquire(&slot->mutex);
+
+ slot->data.confirmed_flush = lsn;
+
+ /* if were past the location required for bumping xmin, do so */
+ if (slot->candidate_xmin_lsn != InvalidXLogRecPtr &&
+ slot->candidate_xmin_lsn <= lsn)
+ {
+ /*
+ * We have to write the changed xmin to disk *before* we change
+ * the in-memory value, otherwise after a crash we wouldn't know
+ * that some catalog tuples might have been removed already.
+ *
+ * Ensure that by first writing to ->xmin and only update
+ * ->effective_xmin once the new state is synced to disk. After a
+ * crash ->effective_xmin is set to ->xmin.
+ */
+ if (TransactionIdIsValid(slot->candidate_catalog_xmin) &&
+ slot->data.catalog_xmin != slot->candidate_catalog_xmin)
+ {
+ slot->data.catalog_xmin = slot->candidate_catalog_xmin;
+ slot->candidate_catalog_xmin = InvalidTransactionId;
+ slot->candidate_xmin_lsn = InvalidXLogRecPtr;
+ updated_xmin = true;
+ }
+ }
+
+ if (slot->candidate_restart_valid != InvalidXLogRecPtr &&
+ slot->candidate_restart_valid <= lsn)
+ {
+ Assert(slot->candidate_restart_lsn != InvalidXLogRecPtr);
+
+ slot->data.restart_lsn = slot->candidate_restart_lsn;
+ slot->candidate_restart_lsn = InvalidXLogRecPtr;
+ slot->candidate_restart_valid = InvalidXLogRecPtr;
+ updated_restart = true;
+ }
+
+ SpinLockRelease(&slot->mutex);
+
+ /* first write new xmin to disk, so we know whats up after a crash */
+ if (updated_xmin || updated_restart)
+ {
+ ReplicationSlotMarkDirty();
+ ReplicationSlotSave();
+ elog(DEBUG1, "updated xmin: %u restart: %u", updated_xmin, updated_restart);
+ }
+ /*
+ * Now the new xmin is safely on disk, we can let the global value
+ * advance. We do not take ProcArrayLock or similar since we only
+ * advance xmin here and there's not much harm done by a concurrent
+ * computation missing that.
+ */
+ if (updated_xmin)
+ {
+ SpinLockAcquire(&slot->mutex);
+ slot->effective_catalog_xmin = slot->data.catalog_xmin;
+ SpinLockRelease(&slot->mutex);
+
+ ReplicationSlotsComputeRequiredXmin(false);
+ ReplicationSlotsComputeRequiredLSN();
+ }
+ }
+ else
+ {
+ volatile ReplicationSlot *slot = MyReplicationSlot;
+
+ SpinLockAcquire(&slot->mutex);
+ slot->data.confirmed_flush = lsn;
+ SpinLockRelease(&slot->mutex);
+ }
+}
--- /dev/null
+/*-------------------------------------------------------------------------
+ *
+ * logicalfuncs.c
+ *
+ * Support functions for using logical decoding and managemnt of
+ * logical replication slots via SQL.
+ *
+ *
+ * Copyright (c) 2012-2014, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ * src/backend/replication/logicalfuncs.c
+ *-------------------------------------------------------------------------
+ */
+
+#include "postgres.h"
+
+#include
+
+#include "fmgr.h"
+#include "funcapi.h"
+#include "miscadmin.h"
+
+#include "catalog/pg_type.h"
+
+#include "nodes/makefuncs.h"
+
+#include "mb/pg_wchar.h"
+
+#include "utils/array.h"
+#include "utils/builtins.h"
+#include "utils/inval.h"
+#include "utils/memutils.h"
+#include "utils/pg_lsn.h"
+#include "utils/resowner.h"
+#include "utils/lsyscache.h"
+
+#include "replication/decode.h"
+#include "replication/logical.h"
+#include "replication/logicalfuncs.h"
+
+#include "storage/fd.h"
+
+/* private date for writing out data */
+typedef struct DecodingOutputState {
+ Tuplestorestate *tupstore;
+ TupleDesc tupdesc;
+ bool binary_output;
+ int64 returned_rows;
+} DecodingOutputState;
+
+/*
+ * Prepare for a output plugin write.
+ */
+static void
+LogicalOutputPrepareWrite(LogicalDecodingContext *ctx, XLogRecPtr lsn, TransactionId xid,
+ bool last_write)
+{
+ resetStringInfo(ctx->out);
+}
+
+/*
+ * Perform output plugin write into tuplestore.
+ */
+static void
+LogicalOutputWrite(LogicalDecodingContext *ctx, XLogRecPtr lsn, TransactionId xid,
+ bool last_write)
+{
+ Datum values[3];
+ bool nulls[3];
+ DecodingOutputState *p;
+
+ /* SQL Datums can only be of a limited length... */
+ if (ctx->out->len > MaxAllocSize - VARHDRSZ)
+ elog(ERROR, "too much output for sql interface");
+
+ p = (DecodingOutputState *) ctx->output_writer_private;
+
+ memset(nulls, 0, sizeof(nulls));
+ values[0] = LSNGetDatum(lsn);
+ values[1] = TransactionIdGetDatum(xid);
+
+ /*
+ * Assert ctx->out is in database encoding when we're writing textual
+ * output.
+ */
+ if (!p->binary_output)
+ Assert(pg_verify_mbstr(GetDatabaseEncoding(),
+ ctx->out->data, ctx->out->len,
+ false));
+
+ /* ick, but cstring_to_text_with_len works for bytea perfectly fine */
+ values[2] = PointerGetDatum(
+ cstring_to_text_with_len(ctx->out->data, ctx->out->len));
+
+ tuplestore_putvalues(p->tupstore, p->tupdesc, values, nulls);
+ p->returned_rows++;
+}
+
+/*
+ * TODO: This is duplicate code with pg_xlogdump, similar to walsender.c, but
+ * we currently don't have the infrastructure (elog!) to share it.
+ */
+static void
+XLogRead(char *buf, TimeLineID tli, XLogRecPtr startptr, Size count)
+{
+ char *p;
+ XLogRecPtr recptr;
+ Size nbytes;
+
+ static int sendFile = -1;
+ static XLogSegNo sendSegNo = 0;
+ static uint32 sendOff = 0;
+
+ p = buf;
+ recptr = startptr;
+ nbytes = count;
+
+ while (nbytes > 0)
+ {
+ uint32 startoff;
+ int segbytes;
+ int readbytes;
+
+ startoff = recptr % XLogSegSize;
+
+ if (sendFile < 0 || !XLByteInSeg(recptr, sendSegNo))
+ {
+ char path[MAXPGPATH];
+
+ /* Switch to another logfile segment */
+ if (sendFile >= 0)
+ close(sendFile);
+
+ XLByteToSeg(recptr, sendSegNo);
+
+ XLogFilePath(path, tli, sendSegNo);
+
+ sendFile = BasicOpenFile(path, O_RDONLY | PG_BINARY, 0);
+
+ if (sendFile < 0)
+ {
+ if (errno == ENOENT)
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("requested WAL segment %s has already been removed",
+ path)));
+ else
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not open file \"%s\": %m",
+ path)));
+ }
+ sendOff = 0;
+ }
+
+ /* Need to seek in the file? */
+ if (sendOff != startoff)
+ {
+ if (lseek(sendFile, (off_t) startoff, SEEK_SET) < 0)
+ {
+ char path[MAXPGPATH];
+
+ XLogFilePath(path, tli, sendSegNo);
+
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not seek in log segment %s to offset %u: %m",
+ path, startoff)));
+ }
+ sendOff = startoff;
+ }
+
+ /* How many bytes are within this segment? */
+ if (nbytes > (XLogSegSize - startoff))
+ segbytes = XLogSegSize - startoff;
+ else
+ segbytes = nbytes;
+
+ readbytes = read(sendFile, p, segbytes);
+ if (readbytes <= 0)
+ {
+ char path[MAXPGPATH];
+
+ XLogFilePath(path, tli, sendSegNo);
+
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not read from log segment %s, offset %u, length %lu: %m",
+ path, sendOff, (unsigned long) segbytes)));
+ }
+
+ /* Update state for read */
+ recptr += readbytes;
+
+ sendOff += readbytes;
+ nbytes -= readbytes;
+ p += readbytes;
+ }
+}
+
+static void
+check_permissions(void)
+{
+ if (!superuser() && !has_rolreplication(GetUserId()))
+ ereport(ERROR,
+ (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+ (errmsg("must be superuser or replication role to use replication slots"))));
+}
+
+/*
+ * read_page callback for logical decoding contexts.
+ *
+ * Public because it would likely be very helpful for someone writing another
+ * output method outside walsender, e.g. in a bgworker.
+ *
+ * TODO: The walsender has it's own version of this, but it relies on the
+ * walsender's latch being set whenever WAL is flushed. No such infrastructure
+ * exists for normal backends, so we have to do a check/sleep/repeat style of
+ * loop for now.
+ */
+int
+logical_read_local_xlog_page(XLogReaderState *state, XLogRecPtr targetPagePtr,
+ int reqLen, XLogRecPtr targetRecPtr, char *cur_page, TimeLineID *pageTLI)
+{
+ XLogRecPtr flushptr,
+ loc;
+ int count;
+
+ loc = targetPagePtr + reqLen;
+ while (1)
+ {
+ /*
+ * TODO: we're going to have to do something more intelligent about
+ * timelines on standbys. Use readTimeLineHistory() and
+ * tliOfPointInHistory() to get the proper LSN? For now we'll catch
+ * that case earlier, but the code and TODO is left in here for when
+ * that changes.
+ */
+ if (!RecoveryInProgress())
+ {
+ *pageTLI = ThisTimeLineID;
+ flushptr = GetFlushRecPtr();
+ }
+ else
+ flushptr = GetXLogReplayRecPtr(pageTLI);
+
+ if (loc <= flushptr)
+ break;
+
+ CHECK_FOR_INTERRUPTS();
+ pg_usleep(1000L);
+ }
+
+ /* more than one block available */
+ if (targetPagePtr + XLOG_BLCKSZ <= flushptr)
+ count = XLOG_BLCKSZ;
+ /* not enough data there */
+ else if (targetPagePtr + reqLen > flushptr)
+ return -1;
+ /* part of the page available */
+ else
+ count = flushptr - targetPagePtr;
+
+ XLogRead(cur_page, *pageTLI, targetPagePtr, XLOG_BLCKSZ);
+
+ return count;
+}
+
+/*
+ * Helper function for the various SQL callable logical decoding functions.
+ */
+static Datum
+pg_logical_slot_get_changes_guts(FunctionCallInfo fcinfo, bool confirm, bool binary)
+{
+ Name name = PG_GETARG_NAME(0);
+ XLogRecPtr upto_lsn;
+ int32 upto_nchanges;
+
+ ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
+ MemoryContext per_query_ctx;
+ MemoryContext oldcontext;
+
+ XLogRecPtr end_of_wal;
+ XLogRecPtr startptr;
+
+ LogicalDecodingContext *ctx;
+
+ ResourceOwner old_resowner = CurrentResourceOwner;
+ ArrayType *arr;
+ Size ndim;
+ List *options = NIL;
+ DecodingOutputState *p;
+
+ if (PG_ARGISNULL(1))
+ upto_lsn = InvalidXLogRecPtr;
+ else
+ upto_lsn = PG_GETARG_LSN(1);
+
+ if (PG_ARGISNULL(2))
+ upto_nchanges = InvalidXLogRecPtr;
+ else
+ upto_nchanges = PG_GETARG_INT32(2);
+
+ /* check to see if caller supports us returning a tuplestore */
+ if (rsinfo == NULL || !IsA(rsinfo, ReturnSetInfo))
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("set-valued function called in context that cannot accept a set")));
+ if (!(rsinfo->allowedModes & SFRM_Materialize))
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("materialize mode required, but it is not allowed in this context")));
+
+ /* state to write output to */
+ p = palloc0(sizeof(DecodingOutputState));
+
+ p->binary_output = binary;
+
+ /* Build a tuple descriptor for our result type */
+ if (get_call_result_type(fcinfo, NULL, &p->tupdesc) != TYPEFUNC_COMPOSITE)
+ elog(ERROR, "return type must be a row type");
+
+ check_permissions();
+
+ CheckLogicalDecodingRequirements();
+
+ arr = PG_GETARG_ARRAYTYPE_P(3);
+ ndim = ARR_NDIM(arr);
+
+ per_query_ctx = rsinfo->econtext->ecxt_per_query_memory;
+ oldcontext = MemoryContextSwitchTo(per_query_ctx);
+
+ if (ndim > 1)
+ {
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("array must be one-dimensional")));
+ }
+ else if (array_contains_nulls(arr))
+ {
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("array must not contain nulls")));
+ }
+ else if (ndim == 1)
+ {
+ int nelems;
+ Datum *datum_opts;
+ int i;
+
+ Assert(ARR_ELEMTYPE(arr) == TEXTOID);
+
+ deconstruct_array(arr, TEXTOID, -1, false, 'i',
+ &datum_opts, NULL, &nelems);
+
+ if (nelems % 2 != 0)
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("array must have even number of elements")));
+
+ for (i = 0; i < nelems; i += 2)
+ {
+ char *name = TextDatumGetCString(datum_opts[i]);
+ char *opt = TextDatumGetCString(datum_opts[i + 1]);
+
+ options = lappend(options, makeDefElem(name, (Node *) makeString(opt)));
+ }
+ }
+
+ p->tupstore = tuplestore_begin_heap(true, false, work_mem);
+ rsinfo->returnMode = SFRM_Materialize;
+ rsinfo->setResult = p->tupstore;
+ rsinfo->setDesc = p->tupdesc;
+
+ /* compute the current end-of-wal */
+ if (!RecoveryInProgress())
+ end_of_wal = GetFlushRecPtr();
+ else
+ end_of_wal = GetXLogReplayRecPtr(NULL);
+
+ CheckLogicalDecodingRequirements();
+ ReplicationSlotAcquire(NameStr(*name));
+
+ PG_TRY();
+ {
+ ctx = CreateDecodingContext(InvalidXLogRecPtr,
+ options,
+ logical_read_local_xlog_page,
+ LogicalOutputPrepareWrite,
+ LogicalOutputWrite);
+
+ MemoryContextSwitchTo(oldcontext);
+
+ /*
+ * Check whether the output pluggin writes textual output if that's
+ * what we need.
+ */
+ if (!binary &&
+ ctx->options.output_type != OUTPUT_PLUGIN_TEXTUAL_OUTPUT)
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("output plugin cannot produce text output")));
+
+ ctx->output_writer_private = p;
+
+ startptr = MyReplicationSlot->data.restart_lsn;
+
+ CurrentResourceOwner = ResourceOwnerCreate(CurrentResourceOwner, "logical decoding");
+
+ /* invalidate non-timetravel entries */
+ InvalidateSystemCaches();
+
+ while ((startptr != InvalidXLogRecPtr && startptr < end_of_wal) ||
+ (ctx->reader->EndRecPtr && ctx->reader->EndRecPtr < end_of_wal))
+ {
+ XLogRecord *record;
+ char *errm = NULL;
+
+ record = XLogReadRecord(ctx->reader, startptr, &errm);
+ if (errm)
+ elog(ERROR, "%s", errm);
+
+ startptr = InvalidXLogRecPtr;
+
+ /*
+ * The {begin_txn,change,commit_txn}_wrapper callbacks above will
+ * store the description into our tuplestore.
+ */
+ if (record != NULL)
+ LogicalDecodingProcessRecord(ctx, record);
+
+ /* check limits */
+ if (upto_lsn != InvalidXLogRecPtr &&
+ upto_lsn <= ctx->reader->EndRecPtr)
+ break;
+ if (upto_nchanges != 0 &&
+ upto_nchanges <= p->returned_rows)
+ break;
+ }
+ }
+ PG_CATCH();
+ {
+ /* clear all timetravel entries */
+ InvalidateSystemCaches();
+
+ PG_RE_THROW();
+ }
+ PG_END_TRY();
+
+ tuplestore_donestoring(tupstore);
+
+ CurrentResourceOwner = old_resowner;
+
+ /*
+ * Next time, start where we left off. (Hunting things, the family
+ * business..)
+ */
+ if (ctx->reader->EndRecPtr != InvalidXLogRecPtr && confirm)
+ LogicalConfirmReceivedLocation(ctx->reader->EndRecPtr);
+
+ /* free context, call shutdown callback */
+ FreeDecodingContext(ctx);
+
+ ReplicationSlotRelease();
+ InvalidateSystemCaches();
+
+ return (Datum) 0;
+}
+
+/*
+ * SQL function returning the changestream as text, consuming the data.
+ */
+Datum
+pg_logical_slot_get_changes(PG_FUNCTION_ARGS)
+{
+ Datum ret = pg_logical_slot_get_changes_guts(fcinfo, true, false);
+ return ret;
+}
+
+/*
+ * SQL function returning the changestream as text, only peeking ahead.
+ */
+Datum
+pg_logical_slot_peek_changes(PG_FUNCTION_ARGS)
+{
+ Datum ret = pg_logical_slot_get_changes_guts(fcinfo, false, false);
+ return ret;
+}
+
+/*
+ * SQL function returning the changestream in binary, consuming the data.
+ */
+Datum
+pg_logical_slot_get_binary_changes(PG_FUNCTION_ARGS)
+{
+ Datum ret = pg_logical_slot_get_changes_guts(fcinfo, true, true);
+ return ret;
+}
+
+/*
+ * SQL function returning the changestream in binary, only peeking ahead.
+ */
+Datum
+pg_logical_slot_peek_binary_changes(PG_FUNCTION_ARGS)
+{
+ Datum ret = pg_logical_slot_get_changes_guts(fcinfo, false, true);
+ return ret;
+}
--- /dev/null
+/*-------------------------------------------------------------------------
+ *
+ * reorderbuffer.c
+ * PostgreSQL logical replay/reorder buffer management
+ *
+ *
+ * Copyright (c) 2012-2014, PostgreSQL Global Development Group
+ *
+ *
+ * IDENTIFICATION
+ * src/backend/replication/reorderbuffer.c
+ *
+ * NOTES
+ * This module gets handed individual pieces of transactions in the order
+ * they are written to the WAL and is responsible to reassemble them into
+ * toplevel transaction sized pieces. When a transaction is completely
+ * reassembled - signalled by reading the transaction commit record - it
+ * will then call the output plugin (c.f. ReorderBufferCommit()) with the
+ * individual changes. The output plugins rely on snapshots built by
+ * snapbuild.c which hands them to us.
+ *
+ * Transactions and subtransactions/savepoints in postgres are not
+ * immediately linked to each other from outside the performing
+ * backend. Only at commit/abort (or special xact_assignment records) they
+ * are linked together. Which means that we will have to splice together a
+ * toplevel transaction from its subtransactions. To do that efficiently we
+ * build a binary heap indexed by the smallest current lsn of the individual
+ * subtransactions' changestreams. As the individual streams are inherently
+ * ordered by LSN - since that is where we build them from - the transaction
+ * can easily be reassembled by always using the subtransaction with the
+ * smallest current LSN from the heap.
+ *
+ * In order to cope with large transactions - which can be several times as
+ * big as the available memory - this module supports spooling the contents
+ * of a large transactions to disk. When the transaction is replayed the
+ * contents of individual (sub-)transactions will be read from disk in
+ * chunks.
+ *
+ * This module also has to deal with reassembling toast records from the
+ * individual chunks stored in WAL. When a new (or initial) version of a
+ * tuple is stored in WAL it will always be preceded by the toast chunks
+ * emitted for the columns stored out of line. Within a single toplevel
+ * transaction there will be no other data carrying records between a row's
+ * toast chunks and the row data itself. See ReorderBufferToast* for
+ * details.
+ * -------------------------------------------------------------------------
+ */
+#include "postgres.h"
+
+#include
+#include
+
+#include "miscadmin.h"
+
+#include "access/rewriteheap.h"
+#include "access/transam.h"
+#include "access/tuptoaster.h"
+#include "access/xact.h"
+
+#include "catalog/catalog.h"
+
+#include "common/relpath.h"
+
+#include "lib/binaryheap.h"
+
+#include "replication/logical.h"
+#include "replication/reorderbuffer.h"
+#include "replication/slot.h"
+#include "replication/snapbuild.h" /* just for SnapBuildSnapDecRefcount */
+
+#include "storage/bufmgr.h"
+#include "storage/fd.h"
+#include "storage/sinval.h"
+
+#include "utils/builtins.h"
+#include "utils/combocid.h"
+#include "utils/memdebug.h"
+#include "utils/memutils.h"
+#include "utils/relcache.h"
+#include "utils/relfilenodemap.h"
+#include "utils/tqual.h"
+
+/*
+ * For efficiency and simplicity reasons we want to keep Snapshots, CommandIds
+ * and ComboCids in the same list with the user visible INSERT/UPDATE/DELETE
+ * changes. We don't want to leak those internal values to external users
+ * though (they would just use switch()...default:) because that would make it
+ * harder to add to new user visible values.
+ *
+ * This needs to be synchronized with ReorderBufferChangeType! Adjust the
+ * StaticAssertExpr's in ReorderBufferAllocate if you add anything!
+ */
+typedef enum
+{
+ REORDER_BUFFER_CHANGE_INTERNAL_INSERT,
+ REORDER_BUFFER_CHANGE_INTERNAL_UPDATE,
+ REORDER_BUFFER_CHANGE_INTERNAL_DELETE,
+ REORDER_BUFFER_CHANGE_INTERNAL_SNAPSHOT,
+ REORDER_BUFFER_CHANGE_INTERNAL_COMMAND_ID,
+ REORDER_BUFFER_CHANGE_INTERNAL_TUPLECID
+} ReorderBufferChangeTypeInternal;
+
+/* entry for a hash table we use to map from xid to our transaction state */
+typedef struct ReorderBufferTXNByIdEnt
+{
+ TransactionId xid;
+ ReorderBufferTXN *txn;
+} ReorderBufferTXNByIdEnt;
+
+/* data structures for (relfilenode, ctid) => (cmin, cmax) mapping */
+typedef struct ReorderBufferTupleCidKey
+{
+ RelFileNode relnode;
+ ItemPointerData tid;
+} ReorderBufferTupleCidKey;
+
+typedef struct ReorderBufferTupleCidEnt
+{
+ ReorderBufferTupleCidKey key;
+ CommandId cmin;
+ CommandId cmax;
+ CommandId combocid; /* just for debugging */
+} ReorderBufferTupleCidEnt;
+
+/* k-way in-order change iteration support structures */
+typedef struct ReorderBufferIterTXNEntry
+{
+ XLogRecPtr lsn;
+ ReorderBufferChange *change;
+ ReorderBufferTXN *txn;
+ int fd;
+ XLogSegNo segno;
+} ReorderBufferIterTXNEntry;
+
+typedef struct ReorderBufferIterTXNState
+{
+ binaryheap *heap;
+ Size nr_txns;
+ dlist_head old_change;
+ ReorderBufferIterTXNEntry entries[FLEXIBLE_ARRAY_MEMBER];
+} ReorderBufferIterTXNState;
+
+/* toast datastructures */
+typedef struct ReorderBufferToastEnt
+{
+ Oid chunk_id; /* toast_table.chunk_id */
+ int32 last_chunk_seq; /* toast_table.chunk_seq of the last chunk we
+ * have seen */
+ Size num_chunks; /* number of chunks we've already seen */
+ Size size; /* combined size of chunks seen */
+ dlist_head chunks; /* linked list of chunks */
+ struct varlena *reconstructed; /* reconstructed varlena now pointed
+ * to in main tup */
+} ReorderBufferToastEnt;
+
+/* Disk serialization support datastructures */
+typedef struct ReorderBufferDiskChange
+{
+ Size size;
+ ReorderBufferChange change;
+ /* data follows */
+} ReorderBufferDiskChange;
+
+/*
+ * Maximum number of changes kept in memory, per transaction. After that,
+ * changes are spooled to disk.
+ *
+ * The current value should be sufficient to decode the entire transaction
+ * without hitting disk in OLTP workloads, while starting to spool to disk in
+ * other workloads reasonably fast.
+ *
+ * At some point in the future it probaly makes sense to have a more elaborate
+ * resource management here, but it's not entirely clear what that would look
+ * like.
+ */
+static const Size max_changes_in_memory = 4096;
+
+/*
+ * We use a very simple form of a slab allocator for frequently allocated
+ * objects, simply keeping a fixed number in a linked list when unused,
+ * instead pfree()ing them. Without that in many workloads aset.c becomes a
+ * major bottleneck, especially when spilling to disk while decoding batch
+ * workloads.
+ */
+static const Size max_cached_changes = 4096 * 2;
+static const Size max_cached_tuplebufs = 4096 * 2; /* ~8MB */
+static const Size max_cached_transactions = 512;
+
+
+/* ---------------------------------------
+ * primary reorderbuffer support routines
+ * ---------------------------------------
+ */
+static ReorderBufferTXN *ReorderBufferGetTXN(ReorderBuffer *rb);
+static void ReorderBufferReturnTXN(ReorderBuffer *rb, ReorderBufferTXN *txn);
+static ReorderBufferTXN *ReorderBufferTXNByXid(ReorderBuffer *rb,
+ TransactionId xid, bool create, bool *is_new,
+ XLogRecPtr lsn, bool create_as_top);
+
+static void AssertTXNLsnOrder(ReorderBuffer *rb);
+
+/* ---------------------------------------
+ * support functions for lsn-order iterating over the ->changes of a
+ * transaction and its subtransactions
+ *
+ * used for iteration over the k-way heap merge of a transaction and its
+ * subtransactions
+ * ---------------------------------------
+ */
+static ReorderBufferIterTXNState *ReorderBufferIterTXNInit(ReorderBuffer *rb, ReorderBufferTXN *txn);
+static ReorderBufferChange *
+ ReorderBufferIterTXNNext(ReorderBuffer *rb, ReorderBufferIterTXNState *state);
+static void ReorderBufferIterTXNFinish(ReorderBuffer *rb,
+ ReorderBufferIterTXNState *state);
+static void ReorderBufferExecuteInvalidations(ReorderBuffer *rb, ReorderBufferTXN *txn);
+
+/*
+ * ---------------------------------------
+ * Disk serialization support functions
+ * ---------------------------------------
+ */
+static void ReorderBufferCheckSerializeTXN(ReorderBuffer *rb, ReorderBufferTXN *txn);
+static void ReorderBufferSerializeTXN(ReorderBuffer *rb, ReorderBufferTXN *txn);
+static void ReorderBufferSerializeChange(ReorderBuffer *rb, ReorderBufferTXN *txn,
+ int fd, ReorderBufferChange *change);
+static Size ReorderBufferRestoreChanges(ReorderBuffer *rb, ReorderBufferTXN *txn,
+ int *fd, XLogSegNo *segno);
+static void ReorderBufferRestoreChange(ReorderBuffer *rb, ReorderBufferTXN *txn,
+ char *change);
+static void ReorderBufferRestoreCleanup(ReorderBuffer *rb, ReorderBufferTXN *txn);
+
+static void ReorderBufferFreeSnap(ReorderBuffer *rb, Snapshot snap);
+static Snapshot ReorderBufferCopySnap(ReorderBuffer *rb, Snapshot orig_snap,
+ ReorderBufferTXN *txn, CommandId cid);
+
+/* ---------------------------------------
+ * toast reassembly support
+ * ---------------------------------------
+ */
+static void ReorderBufferToastInitHash(ReorderBuffer *rb, ReorderBufferTXN *txn);
+static void ReorderBufferToastReset(ReorderBuffer *rb, ReorderBufferTXN *txn);
+static void ReorderBufferToastReplace(ReorderBuffer *rb, ReorderBufferTXN *txn,
+ Relation relation, ReorderBufferChange *change);
+static void ReorderBufferToastAppendChunk(ReorderBuffer *rb, ReorderBufferTXN *txn,
+ Relation relation, ReorderBufferChange *change);
+
+
+/*
+ * Allocate a new ReorderBuffer
+ */
+ReorderBuffer *
+ReorderBufferAllocate(void)
+{
+ ReorderBuffer *buffer;
+ HASHCTL hash_ctl;
+ MemoryContext new_ctx;
+
+ StaticAssertExpr((int) REORDER_BUFFER_CHANGE_INTERNAL_INSERT == (int) REORDER_BUFFER_CHANGE_INSERT, "out of sync enums");
+ StaticAssertExpr((int) REORDER_BUFFER_CHANGE_INTERNAL_UPDATE == (int) REORDER_BUFFER_CHANGE_UPDATE, "out of sync enums");
+ StaticAssertExpr((int) REORDER_BUFFER_CHANGE_INTERNAL_DELETE == (int) REORDER_BUFFER_CHANGE_DELETE, "out of sync enums");
+
+ /* allocate memory in own context, to have better accountability */
+ new_ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "ReorderBuffer",
+ ALLOCSET_DEFAULT_MINSIZE,
+ ALLOCSET_DEFAULT_INITSIZE,
+ ALLOCSET_DEFAULT_MAXSIZE);
+
+ buffer =
+ (ReorderBuffer *) MemoryContextAlloc(new_ctx, sizeof(ReorderBuffer));
+
+ memset(&hash_ctl, 0, sizeof(hash_ctl));
+
+ buffer->context = new_ctx;
+
+ hash_ctl.keysize = sizeof(TransactionId);
+ hash_ctl.entrysize = sizeof(ReorderBufferTXNByIdEnt);
+ hash_ctl.hash = tag_hash;
+ hash_ctl.hcxt = buffer->context;
+
+ buffer->by_txn = hash_create("ReorderBufferByXid", 1000, &hash_ctl,
+ HASH_ELEM | HASH_FUNCTION | HASH_CONTEXT);
+
+ buffer->by_txn_last_xid = InvalidTransactionId;
+ buffer->by_txn_last_txn = NULL;
+
+ buffer->nr_cached_transactions = 0;
+ buffer->nr_cached_changes = 0;
+ buffer->nr_cached_tuplebufs = 0;
+
+ buffer->outbuf = NULL;
+ buffer->outbufsize = 0;
+
+ buffer->current_restart_decoding_lsn = InvalidXLogRecPtr;
+
+ dlist_init(&buffer->toplevel_by_lsn);
+ dlist_init(&buffer->cached_transactions);
+ dlist_init(&buffer->cached_changes);
+ slist_init(&buffer->cached_tuplebufs);
+
+ return buffer;
+}
+
+/*
+ * Free a ReorderBuffer
+ */
+void
+ReorderBufferFree(ReorderBuffer *rb)
+{
+ MemoryContext context = rb->context;
+
+ /*
+ * We free separately allocated data by entirely scrapping reorderbuffer's
+ * memory context.
+ */
+ MemoryContextDelete(context);
+}
+
+/*
+ * Get a unused, possibly preallocated, ReorderBufferTXN.
+ */
+static ReorderBufferTXN *
+ReorderBufferGetTXN(ReorderBuffer *rb)
+{
+ ReorderBufferTXN *txn;
+
+ /* check the slab cache */
+ if (rb->nr_cached_transactions > 0)
+ {
+ rb->nr_cached_transactions--;
+ txn = (ReorderBufferTXN *)
+ dlist_container(ReorderBufferTXN, node,
+ dlist_pop_head_node(&rb->cached_transactions));
+ }
+ else
+ {
+ txn = (ReorderBufferTXN *)
+ MemoryContextAlloc(rb->context, sizeof(ReorderBufferTXN));
+ }
+
+ memset(txn, 0, sizeof(ReorderBufferTXN));
+
+ dlist_init(&txn->changes);
+ dlist_init(&txn->tuplecids);
+ dlist_init(&txn->subtxns);
+
+ return txn;
+}
+
+/*
+ * Free a ReorderBufferTXN.
+ *
+ * Deallocation might be delayed for efficiency purposes, for details check
+ * the comments above max_cached_changes's definition.
+ */
+void
+ReorderBufferReturnTXN(ReorderBuffer *rb, ReorderBufferTXN *txn)
+{
+ /* clean the lookup cache if we were cached (quite likely) */
+ if (rb->by_txn_last_xid == txn->xid)
+ {
+ rb->by_txn_last_xid = InvalidTransactionId;
+ rb->by_txn_last_txn = NULL;
+ }
+
+ /* free data that's contained */
+
+ if (txn->tuplecid_hash != NULL)
+ {
+ hash_destroy(txn->tuplecid_hash);
+ txn->tuplecid_hash = NULL;
+ }
+
+ if (txn->invalidations)
+ {
+ pfree(txn->invalidations);
+ txn->invalidations = NULL;
+ }
+
+ /* check whether to put into the slab cache */
+ if (rb->nr_cached_transactions < max_cached_transactions)
+ {
+ rb->nr_cached_transactions++;
+ dlist_push_head(&rb->cached_transactions, &txn->node);
+ VALGRIND_MAKE_MEM_UNDEFINED(txn, sizeof(ReorderBufferTXN));
+ VALGRIND_MAKE_MEM_DEFINED(&txn->node, sizeof(txn->node));
+ }
+ else
+ {
+ pfree(txn);
+ }
+}
+
+/*
+ * Get a unused, possibly preallocated, ReorderBufferChange.
+ */
+ReorderBufferChange *
+ReorderBufferGetChange(ReorderBuffer *rb)
+{
+ ReorderBufferChange *change;
+
+ /* check the slab cache */
+ if (rb->nr_cached_changes)
+ {
+ rb->nr_cached_changes--;
+ change = (ReorderBufferChange *)
+ dlist_container(ReorderBufferChange, node,
+ dlist_pop_head_node(&rb->cached_changes));
+ }
+ else
+ {
+ change = (ReorderBufferChange *)
+ MemoryContextAlloc(rb->context, sizeof(ReorderBufferChange));
+ }
+
+ memset(change, 0, sizeof(ReorderBufferChange));
+ return change;
+}
+
+/*
+ * Free an ReorderBufferChange.
+ *
+ * Deallocation might be delayed for efficiency purposes, for details check
+ * the comments above max_cached_changes's definition.
+ */
+void
+ReorderBufferReturnChange(ReorderBuffer *rb, ReorderBufferChange *change)
+{
+ /* free contained data */
+ switch ((ReorderBufferChangeTypeInternal) change->action_internal)
+ {
+ case REORDER_BUFFER_CHANGE_INTERNAL_INSERT:
+ case REORDER_BUFFER_CHANGE_INTERNAL_UPDATE:
+ case REORDER_BUFFER_CHANGE_INTERNAL_DELETE:
+ if (change->tp.newtuple)
+ {
+ ReorderBufferReturnTupleBuf(rb, change->tp.newtuple);
+ change->tp.newtuple = NULL;
+ }
+
+ if (change->tp.oldtuple)
+ {
+ ReorderBufferReturnTupleBuf(rb, change->tp.oldtuple);
+ change->tp.oldtuple = NULL;
+ }
+ break;
+ case REORDER_BUFFER_CHANGE_INTERNAL_SNAPSHOT:
+ if (change->snapshot)
+ {
+ ReorderBufferFreeSnap(rb, change->snapshot);
+ change->snapshot = NULL;
+ }
+ break;
+ case REORDER_BUFFER_CHANGE_INTERNAL_COMMAND_ID:
+ break;
+ case REORDER_BUFFER_CHANGE_INTERNAL_TUPLECID:
+ break;
+ }
+
+ /* check whether to put into the slab cache */
+ if (rb->nr_cached_changes < max_cached_changes)
+ {
+ rb->nr_cached_changes++;
+ dlist_push_head(&rb->cached_changes, &change->node);
+ VALGRIND_MAKE_MEM_UNDEFINED(change, sizeof(ReorderBufferChange));
+ VALGRIND_MAKE_MEM_DEFINED(&change->node, sizeof(change->node));
+ }
+ else
+ {
+ pfree(change);
+ }
+}
+
+
+/*
+ * Get a unused, possibly preallocated, ReorderBufferTupleBuf
+ */
+ReorderBufferTupleBuf *
+ReorderBufferGetTupleBuf(ReorderBuffer *rb)
+{
+ ReorderBufferTupleBuf *tuple;
+
+ /* check the slab cache */
+ if (rb->nr_cached_tuplebufs)
+ {
+ rb->nr_cached_tuplebufs--;
+ tuple = slist_container(ReorderBufferTupleBuf, node,
+ slist_pop_head_node(&rb->cached_tuplebufs));
+#ifdef USE_ASSERT_CHECKING
+ memset(tuple, 0xdeadbeef, sizeof(ReorderBufferTupleBuf));
+#endif
+ }
+ else
+ {
+ tuple = (ReorderBufferTupleBuf *)
+ MemoryContextAlloc(rb->context, sizeof(ReorderBufferTupleBuf));
+ }
+
+ return tuple;
+}
+
+/*
+ * Free an ReorderBufferTupleBuf.
+ *
+ * Deallocation might be delayed for efficiency purposes, for details check
+ * the comments above max_cached_changes's definition.
+ */
+void
+ReorderBufferReturnTupleBuf(ReorderBuffer *rb, ReorderBufferTupleBuf *tuple)
+{
+ /* check whether to put into the slab cache */
+ if (rb->nr_cached_tuplebufs < max_cached_tuplebufs)
+ {
+ rb->nr_cached_tuplebufs++;
+ slist_push_head(&rb->cached_tuplebufs, &tuple->node);
+ VALGRIND_MAKE_MEM_UNDEFINED(tuple, sizeof(ReorderBufferTupleBuf));
+ VALGRIND_MAKE_MEM_DEFINED(&tuple->node, sizeof(tuple->node));
+ }
+ else
+ {
+ pfree(tuple);
+ }
+}
+
+/*
+ * Return the ReorderBufferTXN from the given buffer, specified by Xid.
+ * If create is true, and a transaction doesn't already exist, create it
+ * (with the given LSN, and as top transaction if that's specified);
+ * when this happens, is_new is set to true.
+ */
+static ReorderBufferTXN *
+ReorderBufferTXNByXid(ReorderBuffer *rb, TransactionId xid, bool create,
+ bool *is_new, XLogRecPtr lsn, bool create_as_top)
+{
+ ReorderBufferTXN *txn;
+ ReorderBufferTXNByIdEnt *ent;
+ bool found;
+
+ Assert(TransactionIdIsValid(xid));
+ Assert(!create || lsn != InvalidXLogRecPtr);
+
+ /*
+ * Check the one-entry lookup cache first
+ */
+ if (TransactionIdIsValid(rb->by_txn_last_xid) &&
+ rb->by_txn_last_xid == xid)
+ {
+ txn = rb->by_txn_last_txn;
+
+ if (txn != NULL)
+ {
+ /* found it, and it's valid */
+ if (is_new)
+ *is_new = false;
+ return txn;
+ }
+
+ /*
+ * cached as non-existant, and asked not to create? Then nothing else
+ * to do.
+ */
+ if (!create)
+ return NULL;
+ /* otherwise fall through to create it */
+ }
+
+ /*
+ * If the cache wasn't hit or it yielded an "does-not-exist" and we want
+ * to create an entry.
+ */
+
+ /* search the lookup table */
+ ent = (ReorderBufferTXNByIdEnt *)
+ hash_search(rb->by_txn,
+ (void *) &xid,
+ create ? HASH_ENTER : HASH_FIND,
+ &found);
+ if (found)
+ txn = ent->txn;
+ else if (create)
+ {
+ /* initialize the new entry, if creation was requested */
+ Assert(ent != NULL);
+
+ ent->txn = ReorderBufferGetTXN(rb);
+ ent->txn->xid = xid;
+ txn = ent->txn;
+ txn->first_lsn = lsn;
+ txn->restart_decoding_lsn = rb->current_restart_decoding_lsn;
+
+ if (create_as_top)
+ {
+ dlist_push_tail(&rb->toplevel_by_lsn, &txn->node);
+ AssertTXNLsnOrder(rb);
+ }
+ }
+ else
+ txn = NULL; /* not found and not asked to create */
+
+ /* update cache */
+ rb->by_txn_last_xid = xid;
+ rb->by_txn_last_txn = txn;
+
+ if (is_new)
+ *is_new = !found;
+
+ Assert(!create || !!txn);
+ return txn;
+}
+
+/*
+ * Queue a change into a transaction so it can be replayed upon commit.
+ */
+void
+ReorderBufferQueueChange(ReorderBuffer *rb, TransactionId xid, XLogRecPtr lsn,
+ ReorderBufferChange *change)
+{
+ ReorderBufferTXN *txn;
+
+ txn = ReorderBufferTXNByXid(rb, xid, true, NULL, lsn, true);
+
+ change->lsn = lsn;
+ Assert(InvalidXLogRecPtr != lsn);
+ dlist_push_tail(&txn->changes, &change->node);
+ txn->nentries++;
+ txn->nentries_mem++;
+
+ ReorderBufferCheckSerializeTXN(rb, txn);
+}
+
+static void
+AssertTXNLsnOrder(ReorderBuffer *rb)
+{
+#ifdef USE_ASSERT_CHECKING
+ dlist_iter iter;
+ XLogRecPtr prev_first_lsn = InvalidXLogRecPtr;
+
+ &nb
projects / postgresql.git / commitdiff