- Adjust functions-comparison">operator precedence
+ Adjust sql-precedence">operator precedence
to match the
SQL standard (Tom Lane)
- "<" and ">" now have the same precedence as "<="
- ">=" and "<>", and IS now has lower
- precedence. NOT now also has symmetric precedence.
- The
GUC operator_precedence_warning can be - enabled to warn about queries where the precedence has changed.
+ The precedence of <= , >=
+ and <> has been reduced to match that of
+ < , >
+ and = . The precedence of IS tests
+ (e.g., x IS NULL) has been reduced to be
+ just below these six comparison operators.
+ Also, multi-keyword operators beginning with NOT now have
+ the precedence of their base operator (for example, NOT
+ BETWEEN now has the same precedence as BETWEEN) whereas
+ before they had inconsistent precedence, behaving like NOT
+ with respect to their left operand but like their base operator with
+ respect to their right operand. The new configuration
+ parameter can be
+ enabled to warn about queries in which these precedence changes result
+ in different parsing choices.
- Use cast conversions for
PL/pgSQL type conversions, - rather than converting to and from text (Tom Lane)
+ Use assignment cast behavior for data type conversions
+ in
PL/pgSQL assignments, rather than converting to and + from text (Tom Lane)
- This causes conversions of booleans to strings to
- return true or false, not
- t/f.
+ This change causes conversions of booleans to strings to
+ produce true or false, not t
+ or f. Other type conversions may succeed in more cases
+ than before; for example, assigning a numeric value 3.9 to
+ an integer variable will now assign 4 rather than failing. If no
+ assignment-grade cast is defined for the particular source and
+ destination types,
PL/pgSQL will fall back to its old + I/O conversion behavior.
- Allow special characters in server
- startup option values to be escaped with a backslash (Andres
- Freund)
+ Allow characters in server
+ command-line options to be escaped with a backslash (Andres Freund)
- This allows characters like spaces to be passed inside option values.
- Passing a backslash now requires supplying a double-backslash.
+ Formerly, spaces in the options string always separated options, so
+ there was no way to include a space in an option value. Including
+ a backslash in an option value now requires writing \\.
-
Set the default value of
- linkend="gssapi-auth">include_realm to not remove
- the
GSS and SSPI realm from the principal - (Stephen Frost)
+
Change the default value of
+ linkend="gssapi-auth">include_realm to 1, so that
+ by default the realm is not removed from a
GSS +
or SSPI principal name (Stephen Frost)
- Fix REASSIGN
- and ABLE">ALTER OWNER TO
- to properly reassign ownership of types, foreign data wrappers,
- and foreign servers (Bruce Momjian)
+ Fix REASSIGN OWNED
+ and YPE">ALTER OWNER TO
+ to properly update permissions lists (ACLs) when changing ownership of
+ types, foreign data wrappers, and foreign servers (Bruce Momjian)
- Remove server
-side GUC autocommit, which + Remove server configuration parameter autocommit, which
was already deprecated and non-operational (Tom Lane)
- Remove
- linkend="catalog-pg-authid">pg_authid.rolcatupdate,
- as it had no purpose (Adam Brightwell)
+ Remove pg_authid's
+ rolcatupdate field, as it had no value (Adam Brightwell)
Changes
- Below you will find a detailed account of the changes between
+ Below you will find a detailed account of the changes between
PostgreSQL 9.5 and the previous major
- release.
+ release.
- Add
GUC
- linkend="guc-gin-pending-list-limit">gin_pending_list_limit
+ Add configuration parameter
to control the size of
GIN pending lists (Fujii Masao)
- Previously this was controlled by
- linkend="guc-work-mem">work_mem. This can also
- be set as an index storage parameter.
+ Previously the list size was controlled
+ by . This can also be set as an index
+ storage parameter.
Issue a warning during the creation of
- linkend="SQL-CREATEINDEX ">hash indexes because they are not
+ linkend="indexes-types ">hash indexes because they are not
crash-safe (Bruce Momjian)
- Improve concurrency of shared
- buffer replacement (Robert Haas, Amit Kapila)
+ Improve concurrency of shared buffer replacement
+ (Robert Haas, Amit Kapila)
Speed up
CRC (cyclic redundancy check) computations (Abhijit Menon-Sen, Heikki Linnakangas)
-
- Also use
CPU instructions for CRC - calculations, if supported
-
- Add
GUC variable
- linkend="guc-cluster-name">cluster_name (Thomas
- Munro)
+ Add new configuration parameter
+ (Thomas Munro)
- This string, set in
+ This string,
typically set in
linkend="config-setting-configuration-file">postgresql.conf,
- allows clients to query the cluster name . This name also appears
- in the process title, allowing for easier grouping of processes
- belonging to the same cluster.
+ allows clients to identify the cluster . This name also appears
+ in the process title of all server processes, allowing for easier
+ identification of processes belonging to the same cluster.
- Prevent non-superusers from changing
- linkend="guc-log-disconnections">log_disconnections
- on connection startup (Fujii Masao)
+ Prevent non-superusers from changing
+ linkend="guc-log-disconnections"> on connection startup (Fujii Masao)
- Their presence replaces checks against the certificate's
+ When they are present, this replaces checks against the certificate's
Common Name.
While PQgetssl()
- can still be used to
then call
OpenSSL + can still be used to call
OpenSSL functions,
PQsslAttribute() returns SSL information in an
SSL-implementation-independent way. (Future versions of libpq might support other
SSL
-
Hav e
libpq honor any OpenSSL +
Mak e
libpq honor any OpenSSL thread callbacks (Jan Urbanski)
- Replace
checkpoint_segments with
- linkend="guc-min-wal-size">min_wal_size and
- max_wal_size
- (Heikki Linnakangas)
+ Replace configuration parameter checkpoint_segments
+ with
+ and (Heikki Linnakangas)
- Add
GUC
- linkend="guc-wal-compression">wal_compression to
- enable compression of full page images stored in
WAL + Add configuration parameter to
+ control compression of full page images stored in
WAL (Rahila Syed, Michael Paquier)
- Allow the recording of transaction
- commit timestamps when
GUC - linkend="guc-track-commit-timestamp">track_commit_timestamp
+ Allow recording of transaction
+ commit timestamps when configuration parameter
+ linkend="guc-track-commit-timestamp">
is enabled (Álvaro Herrera, Petr Jelínek)
- Allow
- linkend="guc-local-preload-libraries">local_preload_libraries
- to be set by ALTER ROLE SET (Peter Eisentraut,
- Kyotaro Horiguchi)
+ Allow to be set
+ by ALTER ROLE SET (Peter Eisentraut, Kyotaro Horiguchi)
- Make
GUC
- linkend="guc-debug-assertions">debug_assertions
+ Make configuration parameter
read-only (Andres Freund)
This means that assertions can no longer be turned
- off once enabled at compile- time, allowing for more
- efficient code optimization. This also removed the
+ off if they were enabled at compile time, allowing for more
+ efficient code optimization. This
change also removed the
linkend="app-postgres-options">postgres -A option.
- Allow setting
- linkend="guc-effective-io-concurrency">effective_io_concurrency
- on systems where it has no effect (Peter Eisentraut)
+ Allow setting on
+ systems where it has no effect (Peter Eisentraut)
linkend="linux-memory-overcommit">PG_OOM_ADJUST_FILE
and
linkend="linux-memory-overcommit">PG_OOM_ADJUST_VALUE
- to
control Linux
OOM killer (Gurjeet Singh) + to
help control the Linux
OOM killer (Gurjeet Singh)
- The previous
OOM control involved a compile-time - option.
+ The previous
OOM control infrastructure involved a + compile-time option.
-
GUC pause_at_recovery_target was also - removed.
+ This replaces the old parameter pause_at_recovery_target.
-
- Add archive_mode
+ Add new value
always to allow standbys to always archive received
- linkend="guc-wal-retrieve-retry-interval">wal_retrieve_retry_interval
- to control
WAL read retry after failure (Alexey - Vasiliev, Michael Paquier)
+ Add configuration
+ parameter to
+ control
WAL read retry after failure + (Alexey Vasiliev, Michael Paquier)
- linkend="guc-log-replication-commands">log_replication_commands
+ Add configuration parameter
+ linkend="guc-log-replication-commands">
to log replication commands (Fujii Masao)
By default, replication commands, e.g.
linkend="protocol-replication">IDENTIFY_SYSTEM,
- are not logged, even when
- linkend="guc-log-statement">log_statement is set
+ are not logged, even when is set
to all.
- Allow the labeling
+ Allow labeling
of the origin of logical replication changes (Andres Freund)
- Report the
backend s holding replication slots in
+ Report the
processe s holding replication slots in
linkend="catalog-pg-replication-slots">pg_replication_slots
(Craig Ringer)
- This allows the creation of local foreign tables definitions
- that match the remote table structure. Currently, only the
- foreign data wrapper supports this feature.
+ This command allows automatic creation of local foreign tables
+ that match the structure of existing tables on a remote server.
- These checks are assumed to be enforced on the remote server,
- and are not checked locally. However, they are considered for
- optimization and constraint-exclusion checking.
+ These constraints are assumed to be enforced on the remote server,
+ and are not enforced locally. However, they are assumed to hold for
+ purposes of query optimization, such
+ as constraint
+ exclusion.
- Add
- linkend="pg-event-trigger-ddl-command-end-functions">pg_event_trigger_ddl_commands
- set-returning function, which returns
DDL activity + Add a set-returning function
+ linkend="pg-event-trigger-ddl-command-end-functions">
pg_event_trigger_ddl_commands(), which returns DDL activity associated with event triggers (Álvaro Herrera)
- Previously the namespace was not returned, leading to invalid
- XML.
+ Previously the namespace was not returned, potentially leading to
+ invalid XML.
- Tighten s
pecification of
+ Tighten s
yntax of
linkend="datatype-interval-input">INTERVAL precision
specifications (Bruce Momjian)
Add
JSONB functions
linkend="functions-json-processing-table">jsonb_set()
and
- linkend="functions-json-processing-table">jsonb_pretty
+ linkend="functions-json-processing-table">jsonb_pretty()
(Dmitry Dolgov, Andrew Dunstan, Petr Jelínek)
- Add several generator functions for JSONB that exist
- for JSON (Andrew Dunstan)
+ Add several generator functions for JSONB that already
+ existed for JSON (Andrew Dunstan)
- The
functions are
+ The
se are
linkend="functions-json-creation-table">to_jsonb(),
linkend="functions-json-creation-table">jsonb_object(),
- Add
+ Add
a
linkend="functions-math-func-table">width_bucket()
- which supports any sortable data type and non-uniform bucket widths
- (Petr Jelínek)
+ variant that supports any sortable data type and non-uniform bucket
+ widths (Petr Jelínek)
- User-defined => operators have been issuing
- warnings since Postgres 9.0, and were removed in hstore in 9.2.
- Previously only := could be used.
+ Previously only := could be used. This requires removing
+ the possibility for => to be a user-defined operator.
+ Creation of user-defined => operators has been issuing
+ warnings since Postgres 9.0.
- Loosen security checks for viewing
+ Loosen security checks for viewing
queries in
linkend="pg-stat-activity-view">pg_stat_activity,
-
+
executing
linkend="functions-admin-signal-table">pg_cancel_backend(),
- and
- linkend="functions-admin-signal-table">pg_terminate_backend
+ and
executing
+ linkend="functions-admin-signal-table">pg_terminate_backend()
(Stephen Frost)
- Now, role membership is sufficient; previously only the same
- role could perform such operations.
+ Now, role membership is sufficient; previously only the same
+ role could perform these operations.
- A
dd specification of conversion routines to/from SQL - data types to procedural languages data typ es (Peter Eisentraut)
+ A
llow specification of conversion routines between SQL + data types and data types of procedural languag es (Peter Eisentraut)
- This adds new commands
+ This
change adds new commands
linkend="SQL-CREATETRANSFORM">
CREATE/
linkend="SQL-DROPTRANSFORM">DROP TRANSFORM.
- This also adds
transformations between
+ This also adds
optional transformations between the
linkend="hstore">
hstore and
- linkend="ltree">
ltree to/from
+ linkend="ltree">
ltree types t o/from
linkend="plperl">
PL/Perl and
linkend="plpython">
PL/Python.
+
+ which allows re-synchronizing a master server after failback
+ (Heikki Linnakangas)
+
+
+
Allow
- Have
- linkend="app-pgbasebackup">
pg_basebackup use - a tablespace mapping file with the
tar format, - to handle file paths of 100+ characters in length and sybolic
- links on MS Windows (Amit Kapila)
+ use a tablespace mapping file when using
tar format, + to support symbolic links and file paths of 100+ characters in length
+ on MS Windows (Amit Kapila)
+
+
+
+
+ --stats to display summary statistics (Abhijit Menon-Sen)
Add
psql setting
linkend="APP-PSQL-meta-commands">pager_min_lines
- setting to control pager invocation (Andrew Dunstan)
+ to control pager invocation (Andrew Dunstan)
Add
psql tab completion when setting the - <varname>search_path> variable (Jeff Janes)
+ <xref linkend="guc-search-path" > variable (Jeff Janes)
- Improve
psql tab- completion for triggers and rules + Improve
psql's tab completion for triggers and rules (Andreas Karlsson)
- Allow
psql \watch to output + Allow
psql's \watch to output \timing information (Fujii Masao)
- Allow tab completion of
psql \c - role name s (Ian Barwick)
+ Allow tab completion of role names
+
in psql \c command s (Ian Barwick)
- Change
pg_ctl default shutdown mode from + Change
pg_ctl's default shutdown mode from smart to fast (Bruce Momjian)
+
+
<xref linkend="pgbench">
+
+
+
+
+ Move pgbench from contrib to src/bin
+ (Peter Eisentraut)
+
+
+
+
+ Allow counting of pgbench transactions that take over a specified
+ amount of time (Fabien Coelho)
+
+
+ This is controlled by new --latency-limit option.
+
+
+
+
+ Allow pgbench to generate Gaussian/exponential distributions
+ using \setrandom (Kondo Mitsumasa, Fabien Coelho)
+
+
+
+
+ Allow
pgbench's \set command to handle + multi-operator expressions (Robert Haas, Fabien Coelho)
+
+
+
+
+
+
+
- Improve dynahash capabilities (Teodor Sigaev, Tom Lane)
+ Improve hash_create()'s API for selecting
+ simple-binary-key hash functions (Teodor Sigaev, Tom Lane)
- Change columns
+ Change
index opclass for columns
linkend="catalog-pg-seclabel">pg_seclabel.provider
and
- linkend="catalog-pg-seclabel">pg_shseclabel.provider
- to TEXT
+ linkend="catalog-pg-shs eclabel">pg_shseclabel.provider
+ to be text_pattern_ops (Tom Lane)
- This allows these columns to store 64+ characters.
+ This avoids possible problems with these indexes when different
+ databases of a cluster have different default collations.
-
- which allows re-synchronizing a master server after failback
- (Heikki Linnakangas)
-
-
-
Add statistics for minimum, maximum,
- --stats to display summary statistics (Abhijit Menon-Sen)
-
-
-
-
index inspection functions to
linkend="pageinspect">
pageinspect (Heikki Linnakangas, Peter Geoghegan, Michael Paquier)
from contrib to src/test/modules
(Álvaro Herrera)
+
+ These modules are only meant for server testing, so they do not need
+ to be built or installed when packaging
PostgreSQL. +
-
-
<xref linkend="pgbench">
-
-
-
-
- Move pgbench from contrib to src/bin
- (Peter Eisentraut)
-
-
-
-
- Allow counting of pgbench transactions that take over a specified
- amount of time (Fabien Coelho)
-
-
- This is controlled by new --latency-limit option.
-
-
-
-
- Allow pgbench to generate Gaussian/exponential distributions
- using \setrandom (Kondo Mitsumasa, Fabien Coelho)
-
-
-
-
- Allow
pgbench's \set command to handle - multi-operator expressions (Robert Haas, Fabien Coelho)
-
-
-
-
-
-
-
projects / postgresql.git / commitdiff