+
+
Release 9.6.2
+
+
+
Release Date
+ 2017-02-09
+
+
+ This release contains a variety of fixes from 9.6.1.
+ For information about new features in the 9.6 major release, see
+ .
+
+
+
+
Migration to Version 9.6.2
+
+ A dump/restore is not required for those running 9.6.X.
+
+
+ However, if you are upgrading from a version earlier than 9.6.1,
+ see .
+
+
+
+
+
Changes
+
+
+
+
+
+ Ensure that the special snapshot used for catalog scans is not
+ invalidated by premature data pruning (Tom Lane)
+
+
+ Backends failed to account for this snapshot when advertising their
+ oldest xmin, potentially allowing concurrent vacuuming operations to
+ remove data that was still needed. This led to transient failures
+ along the lines of cache lookup failed for relation 1255.
+
+
+
+
+
+ Fix incorrect WAL logging for BRIN indexes (Kuntal Ghosh)
+
+
+ The WAL record emitted for a BRIN revmap page when moving an
+ index tuple to a different page was incorrect. Replay would make the
+ related portion of the index useless, forcing it to be recomputed.
+
+
+
+
+
+ Unconditionally WAL-log creation of the init fork for an
+ unlogged table (Michael Paquier)
+
+
+ Previously, this was skipped when
+ = minimal, but actually it's necessary even in that case
+ to ensure that the unlogged table is properly reset to empty after a
+ crash.
+
+
+
+
+
+ Fix WAL page header validation when re-reading segments (Takayuki
+ Tsunakawa, Amit Kapila)
+
+
+ In corner cases, a spurious out-of-sequence TLI error
+ could be reported during recovery.
+
+
+
+
+
+ Reduce interlocking on standby servers during the replay of btree
+ index vacuuming operations (Simon Riggs)
+
+
+ This change avoids substantial replication delays that sometimes
+ occurred while replaying such operations.
+
+
+
+
+
+ If the stats collector dies during hot standby, restart it (Takayuki
+ Tsunakawa)
+
+
+
+
+
+ Ensure that hot standby feedback works correctly when it's enabled at
+ standby server start (Ants Aasma, Craig Ringer)
+
+
+
+
+
+ Check for interrupts while hot standby is waiting for a conflicting
+ query (Simon Riggs)
+
+
+
+
+
+ Avoid constantly respawning the autovacuum launcher in a corner case
+ (Amit Khandekar)
+
+
+ This fix avoids problems when autovacuum is nominally off and there
+ are some tables that require freezing, but all such tables are
+ already being processed by autovacuum workers.
+
+
+
+
+
+ Disallow setting the num_sync field to zero in
+ (Fujii Masao)
+
+
+ The correct way to disable synchronous standby is to set the whole
+ value to an empty string.
+
+
+
+
+
+ Don't count background worker processes against a user's connection
+ limit (David Rowley)
+
+
+
+
+
+ Fix check for when an extension member object can be dropped (Tom Lane)
+
+
+ Extension upgrade scripts should be able to drop member objects,
+ but this was disallowed for serial-column sequences, and possibly
+ other cases.
+
+
+
+
+
+ Fix tracking of initial privileges for extension member objects so
+ that it works correctly with ALTER EXTENSION ... ADD/DROP
+ (Stephen Frost)
+
+
+ An object's current privileges at the time it is added to the
+ extension will now be considered its default privileges; only
+ later changes in its privileges will be dumped by
+ subsequent
pg_dump runs.+
+
+
+
+
+ Make sure ALTER TABLE preserves index tablespace
+ assignments when rebuilding indexes (Tom Lane, Michael Paquier)
+
+
+ Previously, non-default settings
+ of could result in broken
+ indexes.
+
+
+
+
+
+ Fix incorrect updating of trigger function properties when changing a
+ foreign-key constraint's deferrability properties with ALTER
+ TABLE ... ALTER CONSTRAINT (Tom Lane)
+
+
+ This led to odd failures during subsequent exercise of the foreign
+ key, as the triggers were fired at the wrong times.
+
+
+
+
+
+ Prevent dropping a foreign-key constraint if there are pending
+ trigger events for the referenced relation (Tom Lane)
+
+
+ This avoids could not find trigger NNN
+ or relation NNN has no triggers
errors.
+
+
+
+
+
+ Fix ALTER TABLE ... SET DATA TYPE ... USING when child
+ table has different column ordering than the parent
+ (Álvaro Herrera)
+
+
+ Failure to adjust the column numbering in the USING
+ expression led to errors,
+ typically attribute N has wrong type
.
+
+
+
+
+
+ Fix processing of OID column when a table with OIDs is associated to
+ a parent with OIDs via ALTER TABLE ... INHERIT (Amit
+ Langote)
+
+
+ The OID column should be treated the same as regular user columns in
+ this case, but it wasn't, leading to odd behavior in later
+ inheritance changes.
+
+
+
+
+
+ Ensure that CREATE TABLE ... LIKE ... WITH OIDS creates
+ a table with OIDs, whether or not the LIKE-referenced
+ table(s) have OIDs (Tom Lane)
+
+
+
+
+
+ Fix CREATE OR REPLACE VIEW to update the view query
+ before attempting to apply the new view options (Dean Rasheed)
+
+
+ Previously the command would fail if the new options were
+ inconsistent with the old view definition.
+
+
+
+
+
+ Report correct object identity during ALTER TEXT SEARCH
+ CONFIGURATION (Artur Zakirov)
+
+
+ The wrong catalog OID was reported to extensions such as logical
+ decoding.
+
+
+
+
+
+ Fix commit timestamp mechanism to not fail when queried about
+ the special XIDs FrozenTransactionId
+ and BootstrapTransactionId (Craig Ringer)
+
+
+
+
+
+ Check for serializability conflicts before reporting
+ constraint-violation failures (Thomas Munro)
+
+
+ When using serializable transaction isolation, it is desirable
+ that any error due to concurrent transactions should manifest
+ as a serialization failure, thereby cueing the application that
+ a retry might succeed. Unfortunately, this does not reliably
+ happen for duplicate-key failures caused by concurrent insertions.
+ This change ensures that such an error will be reported as a
+ serialization error if the application explicitly checked for
+ the presence of a conflicting key (and did not find it) earlier
+ in the transaction.
+
+
+
+
+
+ Fix incorrect use of view reloptions as regular table reloptions (Tom
+ Lane)
+
+
+ The symptom was spurious ON CONFLICT is not supported on table
+ ... used as a catalog table errors when the target
+ of INSERT ... ON CONFLICT is a view with cascade option.
+
+
+
+
+
+ Fix incorrect target lists can have at most N
+ entries complaint when using ON CONFLICT with
+ wide tables (Tom Lane)
+
+
+
+
+
+ Fix spurious query provides a value for a dropped column
+ errors during INSERT or UPDATE on a table
+ with a dropped column (Tom Lane)
+
+
+
+
+
+ Prevent multicolumn expansion of foo.* in
+ an UPDATE source expression (Tom Lane)
+
+
+ This led to UPDATE target count mismatch --- internal
+ error. Now the syntax is understood as a whole-row variable,
+ as it would be in other contexts.
+
+
+
+
+
+ Ensure that column typmods are determined accurately for
+ multi-row VALUES constructs (Tom Lane)
+
+
+ This fixes problems occurring when the first value in a column has a
+ determinable typmod (e.g., length for a varchar value) but
+ later values don't share the same limit.
+
+
+
+
+
+ Throw error for an unfinished Unicode surrogate pair at the end of a
+ Unicode string (Tom Lane)
+
+
+ Normally, a Unicode surrogate leading character must be followed by a
+ Unicode surrogate trailing character, but the check for this was
+ missed if the leading character was the last character in a Unicode
+ string literal (U&'...') or Unicode identifier
+ (U&"...").
+
+
+
+
+
+ Fix execution of DISTINCT and ordered aggregates when
+ multiple such aggregates are able to share the same transition state
+ (Heikki Linnakangas)
+
+
+
+
+
+ Fix implementation of phrase search operators in tsquery
+ (Tom Lane)
+
+
+ Remove incorrect, and inconsistently-applied, rewrite rules that
+ tried to transform away AND/OR/NOT operators appearing below a PHRASE
+ operator; instead upgrade the execution engine to handle such cases
+ correctly. This fixes assorted strange behavior and possible crashes
+ for text search queries containing such combinations. Also fix
+ nested PHRASE operators to work sanely in combinations other than
+ simple left-deep trees, correct the behavior when removing stopwords
+ from a phrase search clause, and make sure that index searches behave
+ consistently with simple sequential-scan application of such queries.
+
+
+
+
+
+ Ensure that a purely negative text search query, such
+ as !foo, matches empty tsvectors (Tom Dunstan)
+
+
+ Such matches were found by GIN index searches, but not by sequential
+ scans or GiST index searches.
+
+
+
+
+
+ Prevent crash when ts_rewrite() replaces a non-top-level
+ subtree with an empty query (Artur Zakirov)
+
+
+
+
+
+ Fix performance problems in ts_rewrite() (Tom Lane)
+
+
+
+
+
+ Fix ts_rewrite()'s handling of nested NOT operators
+ (Tom Lane)
+
+
+
+
+
+ Improve speed of user-defined aggregates that
+ use array_append() as transition function (Tom Lane)
+
+
+
+
+
+ Fix array_fill() to handle empty arrays properly (Tom Lane)
+
+
+
+
+
+ Fix possible crash in array_position()
+ or array_positions() when processing arrays of records
+ (Junseok Yang)
+
+
+
+
+
+ Fix one-byte buffer overrun in quote_literal_cstr()
+ (Heikki Linnakangas)
+
+
+ The overrun occurred only if the input consisted entirely of single
+ quotes and/or backslashes.
+
+
+
+
+
+ Prevent multiple calls of pg_start_backup()
+ and pg_stop_backup() from running concurrently (Michael
+ Paquier)
+
+
+ This avoids an assertion failure, and possibly worse things, if
+ someone tries to run these functions in parallel.
+
+
+
+
+
+ Disable transform that attempted to remove no-op AT TIME
+ ZONE conversions (Tom Lane)
+
+
+ This resulted in wrong answers when the simplified expression was
+ used in an index condition.
+
+
+
+
+
+ Avoid discarding interval-to-interval casts
+ that aren't really no-ops (Tom Lane)
+
+
+ In some cases, a cast that should result in zeroing out
+ low-order interval fields was mistakenly deemed to be a
+ no-op and discarded. An example is that casting from INTERVAL
+ MONTH to INTERVAL YEAR failed to clear the months field.
+
+
+
+
+
+ Fix crash if the number of workers available to a parallel query
+ decreases during a rescan (Andreas Seltenreich)
+
+
+
+
+
+ Fix bugs in transmitting GUC parameter values to parallel workers
+ (Michael Paquier, Tom Lane)
+
+
+
+
+
+ Allow statements prepared with PREPARE to be given
+ parallel plans (Amit Kapila, Tobias Bussman)
+
+
+
+
+
+ Fix incorrect generation of parallel plans for semi-joins (Tom Lane)
+
+
+
+
+
+ Fix planner's cardinality estimates for parallel joins (Robert Haas)
+
+
+ Ensure that these estimates reflect the number of rows predicted to
+ be seen by each worker, rather than the total.
+
+
+
+
+
+ Fix planner to avoid trying to parallelize plan nodes containing
+ initplans or subplans (Tom Lane, Amit Kapila)
+
+
+
+
+
+ Ensure that cached plans are invalidated by changes in foreign-table
+ options (Amit Langote, Etsuro Fujita, Ashutosh Bapat)
+
+
+
+
+
+ Fix the plan generated for sorted partial aggregation with a constant
+ GROUP BY clause (Tom Lane)
+
+
+
+
+
+ Fix could not find plan for CTE planner error when dealing
+ with a UNION ALL containing CTE references (Tom Lane)
+
+
+
+
+
+ Fix mishandling of initplans when forcibly adding a Material node to
+ a subplan (Tom Lane)
+
+
+ The typical consequence of this mistake was a plan should not
+ reference subplan's variable error.
+
+
+
+
+
+ Fix foreign-key-based join selectivity estimation for semi-joins and
+ anti-joins, as well as inheritance cases (Tom Lane)
+
+
+ The new code for taking the existence of a foreign key relationship
+ into account did the wrong thing in these cases, making the estimates
+ worse not better than the pre-9.6 code.
+
+
+
+
+
+ Fix
pg_dump to emit the data of a sequence that is+ marked as an extension configuration table (Michael Paquier)
+
+
+
+
+
+ Fix mishandling of ALTER DEFAULT PRIVILEGES ... REVOKE
+ in
pg_dump (Stephen Frost)+
+
+
pg_dump missed issuing the+ required REVOKE commands in cases where ALTER
+ DEFAULT PRIVILEGES had been used to reduce privileges to less than
+ they would normally be.
+
+
+
+
+
+ Fix
pg_dump to dump user-defined casts and transforms+ that use built-in functions (Stephen Frost)
+
+
+
+
+
+ Fix
pg_restore with + to behave more sanely if an archive contains
+ unrecognized DROP commands (Tom Lane)
+
+
+ This doesn't fix any live bug, but it may improve the behavior in
+ future if
pg_restore is used with an archive+ generated by a later
pg_dump version.+
+
+
+
+
+ Fix
pg_basebackup's rate limiting in the presence of+ slow I/O (Antonin Houska)
+
+
+ If disk I/O was transiently much slower than the specified rate
+ limit, the calculation overflowed, effectively disabling the rate
+ limit for the rest of the run.
+
+
+
+
+
+ Fix
pg_basebackup's handling of+ symlinked pg_stat_tmp and pg_replslot
+ subdirectories (Magnus Hagander, Michael Paquier)
+
+
+
+
+
+ Fix possible
pg_basebackup failure on standby+ server when including WAL files (Amit Kapila, Robert Haas)
+
+
+
+
+
+ Improve
initdb to insert the correct+ platform-specific default values for
+ the xxx_flush_after parameters
+ into postgresql.conf (Fabien Coelho, Tom Lane)
+
+
+ This is a cleaner way of documenting the default values than was used
+ previously.
+
+
+
+
+
+ Fix possible mishandling of expanded arrays in domain check
+ constraints and CASE execution (Tom Lane)
+
+
+ It was possible for a PL/pgSQL function invoked in these contexts to
+ modify or even delete an array value that needs to be preserved for
+ additional operations.
+
+
+
+
+
+ Fix nested uses of PL/pgSQL functions in contexts such as domain
+ check constraints evaluated during assignment to a PL/pgSQL variable
+ (Tom Lane)
+
+
+
+
+
+ Ensure that the Python exception objects we create for PL/Python are
+ properly reference-counted (Rafa de la Torre, Tom Lane)
+
+
+ This avoids failures if the objects are used after a Python garbage
+ collection cycle has occurred.
+
+
+
+
+
+ Fix PL/Tcl to support triggers on tables that have .tupno
+ as a column name (Tom Lane)
+
+
+ This matches the (previously undocumented) behavior of
+ PL/Tcl's spi_exec and spi_execp commands,
+ namely that a magic .tupno column is inserted only if
+ there isn't a real column named that.
+
+
+
+
+
+ Allow DOS-style line endings in ~/.pgpass files,
+ even on Unix (Vik Fearing)
+
+
+ This change simplifies use of the same password file across Unix and
+ Windows machines.
+
+
+
+
+
+ Fix one-byte buffer overrun if
ecpg is given a file+ name that ends with a dot (Takayuki Tsunakawa)
+
+
+
+
+
+ Fix incorrect error reporting for duplicate data
+ in
psql's \crosstabview (Tom Lane)+
+
+
psql sometimes quoted the wrong row and/or column+ values when complaining about multiple entries for the same crosstab
+ cell.
+
+
+
+
+
+ Fix
psql's tab completion for ALTER DEFAULT+ PRIVILEGES (Gilles Darold, Stephen Frost)
+
+
+
+
+
+ Fix
psql's tab completion for ALTER TABLE t+ ALTER c DROP ... (Kyotaro Horiguchi)
+
+
+
+
+
+ In
psql, treat an empty or all-blank setting of+ the PAGER environment variable as meaning no
+ pager (Tom Lane)
+
+
+ Previously, such a setting caused output intended for the pager to
+ vanish entirely.
+
+
+
+
+
+ Improve contrib/dblink's reporting of
+ low-level
libpq errors, such as out-of-memory+ (Joe Conway)
+
+
+
+
+
+ Teach contrib/dblink to ignore irrelevant server options
+ when it uses a contrib/postgres_fdw foreign server as
+ the source of connection options (Corey Huinker)
+
+
+ Previously, if the foreign server object had options that were not
+ also
libpq connection options, an error occurred.+
+
+
+
+
+ Fix portability problems in contrib/pageinspect's
+ functions for GIN indexes (Peter Eisentraut, Tom Lane)
+
+
+
+
+
+ Fix possible miss of socket read events while waiting on Windows
+ (Amit Kapial)
+
+
+ This error was harmless for most uses, but it is known to cause hangs
+ when trying to use the pldebugger extension.
+
+
+
+
+
+ On Windows, ensure that environment variable changes are propagated
+ to DLLs built with debug options (Christian Ullrich)
+
+
+
+
+
+ Sync our copy of the timezone library with IANA release tzcode2016j
+ (Tom Lane)
+
+
+ This fixes various issues, most notably that timezone data
+ installation failed if the target directory didn't support hard
+ links.
+
+
+
+
+
+ Update time zone data files to
tzdata release 2016j+ for DST law changes in northern Cyprus (adding a new zone
+ Asia/Famagusta), Russia (adding a new zone Europe/Saratov), Tonga,
+ and Antarctica/Casey.
+ Historical corrections for Italy, Kazakhstan, Malta, and Palestine.
+ Switch to preferring numeric zone abbreviations for Tonga.
+
+
+
+
+
+
+
+
Release 9.6.1
projects / postgresql.git / commitdiff