Change assignment rules for PL/pgSQL bound cursor variables (Tom Lane) \u00a7
\nPreviously, the string value of such variables was set to match the variable name during cursor assignment; now it will be assigned during OPEN, and will not match the variable name. To restore the previous behavior, assign the desired portal name to the cursor variable before OPEN.
Disallow NULLS NOT DISTINCT indexes for primary keys (Daniel Gustafsson) \u00a7
Change REINDEX DATABASE and reindexdb to not process indexes on system catalogs (Simon Riggs) \u00a7 \u00a7
Processing such indexes is still possible using REINDEX SYSTEM and reindexdb --system.
Tighten GENERATED expression restrictions on inherited and partitioned tables (Amit Langote, Tom Lane) \u00a7
Columns of parent/partitioned and child/partition tables must all have the same generation status, though now the actual generation expressions can be different.
", "text": "Tighten GENERATED expression restrictions on inherited and partitioned tables (Amit Langote, Tom Lane) \u00a7 Columns of parent/partitioned and child/partition tables must all have the same generation status, though now the actual generation expressions can be different.", "title": "Tighten GENERATED expression restrictions on inherited and partitioned tables", "commits": ["8bf6ec3ba"], "section": "Compatibility", "category": "compatibility", "source_url": "/docs/release/16.0/#RELEASE-16-MIGRATION", "source_hash": "2f4d4a22c5c5fa0712b58944dab99662aed475eb7a373d393020034f4fd8bd45", "section_path": ["Compatibility"], "commit_groups": [["8bf6ec3ba"]], "identity_text": "Tighten GENERATED expression restrictions on inherited and partitioned tables (Amit Langote, Tom Lane) Columns of parent/partitioned and child/partition tables must all have the same generation status, though now the actual generation expressions can be different.", "commit_aliases": ["8bf6ec3ba"], "source_commits": ["8bf6ec3ba"], "source_entry_id": "16.0/migration/004", "db_id": "21dabc3401e19db3c3edc0511f7b9664", "patch_ids": ["8f6de277fb37227b85a8719ec2c051ed"], "statement_hash": "b12095fa0feb00d8de6353bbc3e87ff460b6318f64cb13a5fc5b6867115a2a68", "relations": [], "category_label": "Compatibility", "url": "/docs/compare/?release=16.0#16.0-dda8925a6b01733d", "migration": true}, {"id": "16.0-cb0959e990d03453", "cves": [], "html": "Remove pg_walinspect functions pg_get_wal_records_info_till_end_of_wal() and pg_get_wal_stats_till_end_of_wal() (Bharath Rupireddy) \u00a7
Rename server variable force_parallel_mode to debug_parallel_query (David Rowley) \u00a7 \u00a7
Remove the ability to create views manually with ON SELECT rules (Tom Lane) \u00a7
Remove the server variable vacuum_defer_cleanup_age (Andres Freund) \u00a7
This has been unnecessary since hot_standby_feedback and replication slots were added.
Remove server variable promote_trigger_file (Simon Riggs) \u00a7
This was used to promote a standby to primary, but is now more easily accomplished with pg_ctl promote or pg_promote().
Remove read-only server variables lc_collate and lc_ctype (Peter Eisentraut) \u00a7
Collations and locales can vary between databases so having them as read-only server variables was unhelpful.
", "text": "Remove read-only server variables lc_collate and lc_ctype (Peter Eisentraut) \u00a7 Collations and locales can vary between databases so having them as read-only server variables was unhelpful.", "title": "Remove read-only server variables lc_collate and lc_ctype", "commits": ["b0f6c4371"], "section": "Compatibility", "category": "compatibility", "source_url": "/docs/release/16.0/#RELEASE-16-MIGRATION", "source_hash": "b34eee366af5aab8bce4e159774ad21b67e949cafca3f48a82056b4b21398d80", "section_path": ["Compatibility"], "commit_groups": [["b0f6c4371"]], "identity_text": "Remove read-only server variables lc_collate and lc_ctype (Peter Eisentraut) Collations and locales can vary between databases so having them as read-only server variables was unhelpful.", "commit_aliases": ["b0f6c4371"], "source_commits": ["b0f6c4371"], "source_entry_id": "16.0/migration/010", "db_id": "118b79aa4bd23937ad8a0d257a494e71", "patch_ids": ["f2dbea8b8cfad834ac1df4cba3499a6b"], "statement_hash": "7a964152e16996abe66d5ca141d0faaba7cf517ed8c3bff06dfb4d22790bdc30", "relations": [], "category_label": "Compatibility", "url": "/docs/compare/?release=16.0#16.0-5d7b6a3dbc288d82", "migration": true}, {"id": "16.0-008a75f47f428d6f", "cves": [], "html": "Role inheritance now controls the default inheritance status of member roles added during GRANT (Robert Haas) \u00a7
The role's default inheritance behavior can be overridden with the new GRANT ... WITH INHERIT clause. This allows inheritance of some roles and not others because the members' inheritance status is set at GRANT time. Previously the inheritance status of member roles was controlled only by the role's inheritance status, and changes to a role's inheritance status affected all previous and future member roles.
Restrict the privileges of CREATEROLE and its ability to modify other roles (Robert Haas) \u00a7 \u00a7
Previously roles with CREATEROLE privileges could change many aspects of any non-superuser role. Such changes, including adding members, now require the role requesting the change to have ADMIN OPTION permission. For example, they can now change the CREATEDB, REPLICATION, and BYPASSRLS properties only if they also have those permissions.
Remove symbolic links for the postmaster binary (Peter Eisentraut) \u00a7
", "text": "Remove symbolic links for the postmaster binary (Peter Eisentraut) \u00a7", "title": "Remove symbolic links for the postmaster binary", "commits": ["37e267335"], "section": "Compatibility", "category": "compatibility", "source_url": "/docs/release/16.0/#RELEASE-16-MIGRATION", "source_hash": "643f5c387a00bd79512076ba9ae1aa47de37a7ce495aa2b068d793ade64c51d0", "section_path": ["Compatibility"], "commit_groups": [["37e267335"]], "identity_text": "Remove symbolic links for the postmaster binary (Peter Eisentraut)", "commit_aliases": ["37e267335"], "source_commits": ["37e267335"], "source_entry_id": "16.0/migration/013", "db_id": "e60f91bcc7efa985b20c2b610e0405fa", "patch_ids": ["c11cfac0a884a301d3709f054ec4b403"], "statement_hash": "98f455b809af3b1897db450f8744b05f94841f1a0c961582f8387c318304d160", "relations": [], "category_label": "Compatibility", "url": "/docs/compare/?release=16.0#16.0-122c477b05fd7f8b", "migration": true}, {"id": "16.0-4b68db34c6da3880", "cves": [], "html": "Allow incremental sorts in more cases, including DISTINCT (David Rowley) \u00a7 \u00a7
Add the ability for aggregates having ORDER BY or DISTINCT to use pre-sorted data (David Rowley) \u00a7 \u00a7 \u00a7
The new server variable enable_presorted_aggregate can be used to disable this.
Allow memoize atop a UNION ALL (Richard Guo) \u00a7
Allow anti-joins to be performed with the non-nullable input as the inner relation (Richard Guo) \u00a7
", "text": "Allow anti-joins to be performed with the non-nullable input as the inner relation (Richard Guo) \u00a7", "title": "Allow anti-joins to be performed with the non-nullable input as the inner relation", "commits": ["16dc2703c"], "section": "Server / Optimizer", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-OPTIMIZER", "source_hash": "03f667b58e10fd267a76952dfc62dd99b5ad53fe3417512445e4f476c5a38838", "section_path": ["Server", "Optimizer"], "commit_groups": [["16dc2703c"]], "identity_text": "Allow anti-joins to be performed with the non-nullable input as the inner relation (Richard Guo)", "commit_aliases": ["16dc2703c"], "source_commits": ["16dc2703c"], "source_entry_id": "16.0/changes/004", "db_id": "18d7c2e6a18612b48189bd164f622c2c", "patch_ids": ["58b439a932f5376668d066e992208d2f"], "statement_hash": "e4142cc313fa88e0383a8b16d8027f170cd9fa03ad88b68b2a658e1eef029f39", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-c8c541e6340014db", "migration": false}, {"id": "16.0-dfa88d43156ada21", "cves": [], "html": "Allow parallelization of FULL and internal right OUTER hash joins (Melanie Plageman, Thomas Munro) \u00a7
Improve the accuracy of GIN index access optimizer costs (Ronan Dunklau) \u00a7
Allow more efficient addition of heap and index pages (Andres Freund) \u00a7 \u00a7
", "text": "Allow more efficient addition of heap and index pages (Andres Freund) \u00a7 \u00a7", "title": "Allow more efficient addition of heap and index pages", "commits": ["00d1e02be", "26158b852"], "section": "Server / General Performance", "category": "performance", "source_url": "/docs/release/16.0/#RELEASE-16-PERFORMANCE", "source_hash": "9089920a8e54d4aaba9394b50119ba1ff3b08a3ec633dd0643e4ecb1a56985cb", "section_path": ["Server", "General Performance"], "commit_groups": [["00d1e02be"], ["26158b852"]], "identity_text": "Allow more efficient addition of heap and index pages (Andres Freund)", "commit_aliases": ["00d1e02be", "26158b852"], "source_commits": ["00d1e02be", "26158b852"], "source_entry_id": "16.0/changes/007", "db_id": "23b41453c411a0359ff71c525a8c1cdf", "patch_ids": ["adc1b8a52fc2741e959ed0d9c000945a", "dc242f345df4d2d3dc5bb69ce77eb583"], "statement_hash": "aa71c3bded149294de742dfec85b4648abcacaf12009c6bf5ccb5a919527f6b7", "relations": [], "category_label": "Performance", "url": "/docs/compare/?release=16.0#16.0-7a4b29522bf99176", "migration": false}, {"id": "16.0-ddec4d3d0728a75b", "cves": [], "html": "During non-freeze operations, perform page freezing where appropriate (Peter Geoghegan) \u00a7 \u00a7 \u00a7
\nThis makes full-table freeze vacuums less necessary.
", "text": "During non-freeze operations, perform page freezing where appropriate (Peter Geoghegan) \u00a7 \u00a7 \u00a7 This makes full-table freeze vacuums less necessary.", "title": "During non-freeze operations, perform page freezing where appropriate", "commits": ["1de58df4f", "9e5405993", "d977ffd92"], "section": "Server / General Performance", "category": "performance", "source_url": "/docs/release/16.0/#RELEASE-16-PERFORMANCE", "source_hash": "d32cc0679aaee55830366aaf6ce0ed598157f205ffcd31a98d588da63094d20e", "section_path": ["Server", "General Performance"], "commit_groups": [["1de58df4f"], ["9e5405993"], ["d977ffd92"]], "identity_text": "During non-freeze operations, perform page freezing where appropriate (Peter Geoghegan) This makes full-table freeze vacuums less necessary.", "commit_aliases": ["1de58df4f", "9e5405993", "d977ffd92"], "source_commits": ["1de58df4f", "9e5405993", "d977ffd92"], "source_entry_id": "16.0/changes/008", "db_id": "3e0b5f3cd6329916be78c1ea521cbf5d", "patch_ids": ["bebbe66730267e2db642c5c4d083b7c4", "bf9fc376d7111e89a0767ad9e7fbf56c", "d2db854c94ed6f6147811b5fe0a1f1da"], "statement_hash": "a938aff62510da30d6b5d8481d311c5646e9e0fcb644d857e62b6e674f5f06a6", "relations": [], "category_label": "Performance", "url": "/docs/compare/?release=16.0#16.0-ddec4d3d0728a75b", "migration": false}, {"id": "16.0-50cb72ab59eb0e2b", "cves": [], "html": "Allow window functions to use the faster ROWS mode internally when RANGE mode is active but unnecessary (David Rowley) \u00a7
Allow optimization of always-increasing window functions ntile(), cume_dist() and percent_rank() (David Rowley) \u00a7
Allow aggregate functions string_agg() and array_agg() to be parallelized (David Rowley) \u00a7
Improve performance by caching RANGE and LIST partition lookups (Amit Langote, Hou Zhijie, David Rowley) \u00a7
Allow control of the shared buffer usage by vacuum and analyze (Melanie Plageman) \u00a7 \u00a7 \u00a7
\nThe VACUUM/ANALYZE option is BUFFER_USAGE_LIMIT, and the vacuumdb option is --buffer-usage-limit. The default value is set by server variable vacuum_buffer_usage_limit, which also controls autovacuum.
Support wal_sync_method=fdatasync on Windows (Thomas Munro) \u00a7
Allow HOT updates if only BRIN-indexed columns are updated (Matthias van de Meent, Josef Simanek, Tomas Vondra) \u00a7
Improve the speed of updating the process title (David Rowley) \u00a7
", "text": "Improve the speed of updating the process title (David Rowley) \u00a7", "title": "Improve the speed of updating the process title", "commits": ["2cb82e2ac"], "section": "Server / General Performance", "category": "performance", "source_url": "/docs/release/16.0/#RELEASE-16-PERFORMANCE", "source_hash": "25f45e71660eb76e32bfbb8791b92e02c359ac7ae8381abf41b96a8c23d76927", "section_path": ["Server", "General Performance"], "commit_groups": [["2cb82e2ac"]], "identity_text": "Improve the speed of updating the process title (David Rowley)", "commit_aliases": ["2cb82e2ac"], "source_commits": ["2cb82e2ac"], "source_entry_id": "16.0/changes/016", "db_id": "780f6379ebccc595c720ee9fcaefe263", "patch_ids": ["727be6c1117ce62f16f3ac6274c3c68f"], "statement_hash": "cc7447bc22129f36c50ba8b7bea9d753276de25a28aeee7304723c405fc40bae", "relations": [], "category_label": "Performance", "url": "/docs/compare/?release=16.0#16.0-c10a90aae2607316", "migration": false}, {"id": "16.0-91b351f3ed043528", "cves": [], "html": "Allow xid/subxid searches and ASCII string detection to use vector operations (Nathan Bossart, John Naylor) \u00a7 \u00a7 \u00a7 \u00a7
ASCII detection is particularly useful for COPY FROM. Vector operations are also used for some C array searches.
Reduce overhead of memory allocations (Andres Freund, David Rowley) \u00a7
", "text": "Reduce overhead of memory allocations (Andres Freund, David Rowley) \u00a7", "title": "Reduce overhead of memory allocations", "commits": ["c6e0fe1f2"], "section": "Server / General Performance", "category": "performance", "source_url": "/docs/release/16.0/#RELEASE-16-PERFORMANCE", "source_hash": "620b2a3949e3e7b8a118a8ef9a4c73064c67c2d0da2f86bf899ec7ccf09bba4c", "section_path": ["Server", "General Performance"], "commit_groups": [["c6e0fe1f2"]], "identity_text": "Reduce overhead of memory allocations (Andres Freund, David Rowley)", "commit_aliases": ["c6e0fe1f2"], "source_commits": ["c6e0fe1f2"], "source_entry_id": "16.0/changes/018", "db_id": "a1e378022a0e6d1c83b942d1f87f968b", "patch_ids": ["b83ab0346f913fc3be5d8a6b1e7e0b9f"], "statement_hash": "7e28360d239901d070b9c07d1ea9e67fecdfcc424217b969575d245684c199f7", "relations": [], "category_label": "Performance", "url": "/docs/compare/?release=16.0#16.0-a7874a6a5a95944f", "migration": false}, {"id": "16.0-d660ff1fad6a13b1", "cves": [], "html": "Add system view pg_stat_io view to track I/O statistics (Melanie Plageman) \u00a7 \u00a7 \u00a7 \u00a7 \u00a7
Record statistics on the last sequential and index scans on tables (Dave Page) \u00a7
\nThis information appears in pg_stat_*_tables and pg_stat_*_indexes.
Record statistics on the occurrence of updated rows moving to new pages (Corey Huinker) \u00a7
\nThe pg_stat_*_tables column is n_tup_newpage_upd.
Add speculative lock information to the pg_locks system view (Masahiko Sawada, Noriyoshi Shinoda) \u00a7
The transaction id is displayed in the transactionid column and the speculative insertion token is displayed in the objid column.
Add the display of prepared statement result types to the pg_prepared_statements view (Dagfinn Ilmari Manns\u00e5ker) \u00a7 \u00a7
Create subscription statistics entries at subscription creation time so stats_reset is accurate (Andres Freund) \u00a7
Previously entries were created only when the first statistics were reported.
", "text": "Create subscription statistics entries at subscription creation time so stats_reset is accurate (Andres Freund) \u00a7 Previously entries were created only when the first statistics were reported.", "title": "Create subscription statistics entries at subscription creation time so stats_reset is accurate", "commits": ["e0b014295"], "section": "Server / Monitoring", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-MONITORING", "source_hash": "cf954e39877f1c018c3b4f770a8ccff1f6cf7bfadf6a6bb44b17193a515ee586", "section_path": ["Server", "Monitoring"], "commit_groups": [["e0b014295"]], "identity_text": "Create subscription statistics entries at subscription creation time so stats_reset is accurate (Andres Freund) Previously entries were created only when the first statistics were reported.", "commit_aliases": ["e0b014295"], "source_commits": ["e0b014295"], "source_entry_id": "16.0/changes/024", "db_id": "21430e43a8df90341adcb221cb993b06", "patch_ids": ["ca6dc6ad2dbe12cce60fe12b210ce4bf"], "statement_hash": "d3d18d1c12f696d8625d5c7084d48a27c3c180ce1e83f28e08fb4f5da83c65b6", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-db414e3cb1e7b8c7", "migration": false}, {"id": "16.0-488f039274062c68", "cves": [], "html": "Correct the I/O accounting for temp relation writes shown in pg_stat_database (Melanie Plageman) \u00a7
Add function pg_stat_get_backend_subxact() to report on a session's subtransaction cache (Dilip Kumar) \u00a7
Have pg_stat_get_backend_idset(), pg_stat_get_backend_activity(), and related functions use the unchanging backend id (Nathan Bossart) \u00a7
Previously the index values might change during the lifetime of the session.
", "text": "Have pg_stat_get_backend_idset(), pg_stat_get_backend_activity(), and related functions use the unchanging backend id (Nathan Bossart) \u00a7 Previously the index values might change during the lifetime of the session.", "title": "Have pg_stat_get_backend_idset(), pg_stat_get_backend_activity(), and related functions use the unchanging backend id", "commits": ["d7e39d72c"], "section": "Server / Monitoring", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-MONITORING", "source_hash": "f7cc8d702f3d2b5a061d4dd94366c8f2ad9dcc5718ff49a3a0691a2962615890", "section_path": ["Server", "Monitoring"], "commit_groups": [["d7e39d72c"]], "identity_text": "Have pg_stat_get_backend_idset(), pg_stat_get_backend_activity(), and related functions use the unchanging backend id (Nathan Bossart) Previously the index values might change during the lifetime of the session.", "commit_aliases": ["d7e39d72c"], "source_commits": ["d7e39d72c"], "source_entry_id": "16.0/changes/027", "db_id": "1371d92f4cb40808c3e5de69dfae7392", "patch_ids": ["f8cafab6edefef23fda3e8e195c5cc79"], "statement_hash": "64c217213dd4bbe198f05b3a28d19b6732ca8c68b2a59720946c5fc7fd39f465", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-f8c91168c1a3672d", "migration": false}, {"id": "16.0-2549f052a3117589", "cves": [], "html": "Report stand-alone backends with a special backend type (Melanie Plageman) \u00a7
", "text": "Report stand-alone backends with a special backend type (Melanie Plageman) \u00a7", "title": "Report stand-alone backends with a special backend type", "commits": ["0c679464a"], "section": "Server / Monitoring", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-MONITORING", "source_hash": "50518296140e8f9dedf8223338254057a8fd36c840ed3691352ad0891889aae7", "section_path": ["Server", "Monitoring"], "commit_groups": [["0c679464a"]], "identity_text": "Report stand-alone backends with a special backend type (Melanie Plageman)", "commit_aliases": ["0c679464a"], "source_commits": ["0c679464a"], "source_entry_id": "16.0/changes/028", "db_id": "53d6d2f6b779b477cb6e112097562a4c", "patch_ids": ["811e1d1439c998177ee8fce1a81021b0"], "statement_hash": "31bb59bfe5a801e3ca0a2c5426432aff8321eb48586cfc8e8291d08c599edf81", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-2549f052a3117589", "migration": false}, {"id": "16.0-10d4408a62e48dd3", "cves": [], "html": "Add wait event SpinDelay to report spinlock sleep delays (Andres Freund) \u00a7
Create new wait event DSMAllocate to indicate waiting for dynamic shared memory allocation (Thomas Munro) \u00a7
Previously this type of wait was reported as DSMFillZeroWrite, which was also used by mmap() allocations.
Add the database name to the process title of logical WAL senders (Tatsuhiro Nakamori) \u00a7
\nPhysical WAL senders do not display a database name.
", "text": "Add the database name to the process title of logical WAL senders (Tatsuhiro Nakamori) \u00a7 Physical WAL senders do not display a database name.", "title": "Add the database name to the process title of logical WAL senders", "commits": ["af205152e"], "section": "Server / Monitoring", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-MONITORING", "source_hash": "d0de6d17ef6a64f43aa372cb1500fae473c66d86de26bdc6eef331d0ce4f5ecf", "section_path": ["Server", "Monitoring"], "commit_groups": [["af205152e"]], "identity_text": "Add the database name to the process title of logical WAL senders (Tatsuhiro Nakamori) Physical WAL senders do not display a database name.", "commit_aliases": ["af205152e"], "source_commits": ["af205152e"], "source_entry_id": "16.0/changes/031", "db_id": "7f1eb683be226d26b1ca30934fe374e6", "patch_ids": ["b76cfa49f69a819f02742df66c91bf1f"], "statement_hash": "51d418a4214815827ee028d5cf1d4b161f8eea015704fae6c82f6af57ce2b1c9", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-a5960c7a3581b43e", "migration": false}, {"id": "16.0-5236954d2b374442", "cves": [], "html": "Add checkpoint and REDO LSN information to log_checkpoints messages (Bharath Rupireddy, Kyotaro Horiguchi) \u00a7
Provide additional details during client certificate failures (Jacob Champion) \u00a7
", "text": "Provide additional details during client certificate failures (Jacob Champion) \u00a7", "title": "Provide additional details during client certificate failures", "commits": ["3a0e38504"], "section": "Server / Monitoring", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-MONITORING", "source_hash": "8034f9b6e0b7a1f452d385398a46b58b691ffccbe8362f47f73dbb4e69b60fa6", "section_path": ["Server", "Monitoring"], "commit_groups": [["3a0e38504"]], "identity_text": "Provide additional details during client certificate failures (Jacob Champion)", "commit_aliases": ["3a0e38504"], "source_commits": ["3a0e38504"], "source_entry_id": "16.0/changes/033", "db_id": "109962e39cd38a26e56c069afacaad5b", "patch_ids": ["c30d9457d6b9b277a556009df2b65fe8"], "statement_hash": "87e65dc56ee8c106d24e33e33b7df8db2c8487e88deb6a0bab861dc6a069fdb8", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-4f795a3a7351a6fe", "migration": false}, {"id": "16.0-4da84340f31e2ff5", "cves": [], "html": "Add predefined role pg_create_subscription with permission to create subscriptions (Robert Haas) \u00a7
Allow subscriptions to not require passwords (Robert Haas) \u00a7 \u00a7 \u00a7
\nThis is accomplished with the option password_required=false.
Simplify permissions for LOCK TABLE (Jeff Davis) \u00a7
Previously a user's ability to perform LOCK TABLE at various lock levels was limited to the lock levels required by the commands they had permission to execute on the table. For example, someone with UPDATE permission could perform all lock levels except ACCESS SHARE, even though it was a lesser lock level. Now users can issue lesser lock levels if they already have permission for greater lock levels.
Allow ALTER GROUP group_name ADD USER user_name to be performed with ADMIN OPTION (Robert Haas) \u00a7
Previously CREATEROLE permission was required.
Allow GRANT to use WITH ADMIN TRUE/FALSE syntax (Robert Haas) \u00a7
Previously only the WITH ADMIN OPTION syntax was supported.
Allow roles that create other roles to automatically inherit the new role's rights or the ability to SET ROLE to the new role (Robert Haas, Shi Yu) \u00a7 \u00a7
This is controlled by server variable createrole_self_grant.
Prevent users from changing the default privileges of non-inherited roles (Robert Haas) \u00a7
\nThis is now only allowed for inherited roles.
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\nThe current user still must have sufficient permissions given by the specified granted-by user.
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Add dependency tracking to roles which have granted privileges (Robert Haas) \u00a7
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Add dependency tracking of grantors for GRANT records (Robert Haas) \u00a7
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Allow multiple role membership records (Robert Haas) \u00a7 \u00a7
\nPreviously a new membership grant would remove a previous matching membership grant, even if other aspects of the grant did not match.
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\nRestoring such users could lead to errors.
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Previously only a single privilege name, like SELECT, was accepted.
Add support for Kerberos credential delegation (Stephen Frost) \u00a7 \u00a7 \u00a7 \u00a7
\nThis is enabled with server variable gss_accept_delegation and libpq connection parameter gssdelegation.
Allow the SCRAM iteration count to be set with server variable scram_iterations (Daniel Gustafsson) \u00a7
Improve performance of server variable management (Tom Lane) \u00a7 \u00a7
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Move various postgresql.conf items into new categories (Shinya Kato) \u00a7
This also affects the categories displayed in the pg_settings view.
Prevent configuration file recursion beyond 10 levels (Julien Rouhaud) \u00a7
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\nRather than honor changes only at the start of each relation, honor them at the start of each block.
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\nThe archive_command command is now more likely to be called with already-archived files after a crash.
Prevent archive_library and archive_command from being set at the same time (Nathan Bossart) \u00a7
Previously archive_library would override archive_command.
Allow the postmaster to terminate children with an abort signal (Tom Lane) \u00a7
\nThis allows collection of a core dump for a stuck child process. This is controlled by send_abort_for_crash and send_abort_for_kill. The postmaster's -T switch is now the same as setting send_abort_for_crash.
Remove the non-functional postmaster -n option (Tom Lane) \u00a7
Allow the server to reserve backend slots for roles with pg_use_reserved_connections membership (Nathan Bossart) \u00a7
The number of reserved slots is set by server variable reserved_connections.
Allow huge pages to work on newer versions of Windows 10 (Thomas Munro) \u00a7
\nThis adds the special handling required to enable huge pages on newer versions of Windows 10.
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Add function pg_split_walfile_name() to report the segment and timeline values of WAL file names (Bharath Rupireddy) \u00a7 \u00a7
Add support for regular expression matching on database and role entries in pg_hba.conf (Bertrand Drouvot) \u00a7
Regular expression patterns are prefixed with a slash. Database and role names that begin with slashes need to be double-quoted if referenced in pg_hba.conf.
Improve user-column handling of pg_ident.conf to match pg_hba.conf (Jelte Fennema) \u00a7
Specifically, add support for all, role membership with +, and regular expressions with a leading slash. Any user name that matches these patterns must be double-quoted.
Allow include files in pg_hba.conf and pg_ident.conf (Julien Rouhaud) \u00a7
These are controlled by include, include_if_exists, and include_dir. System views pg_hba_file_rules and pg_ident_file_mappings now display the file name.
Allow pg_hba.conf tokens to be of unlimited length (Tom Lane) \u00a7
Add rule and map numbers to the system view pg_hba_file_rules (Julien Rouhaud) \u00a7
Determine the default encoding from the locale when using ICU (Jeff Davis) \u00a7
\nPreviously the default was always UTF-8.
Have CREATE DATABASE and CREATE COLLATION's LOCALE options, and initdb and createdb --locale options, control non-libc collation providers (Jeff Davis)
Previously they only controlled libc providers.
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This only works if ICU support is enabled.
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\nThis is done using CREATE COLLATION's new RULES clause, as well as new options for CREATE DATABASE, createdb, and initdb.
Allow Windows to import system locales automatically (Juan Jos\u00e9 Santamar\u00eda Flecha) \u00a7
\nPreviously, only ICU locales could be imported on Windows.
", "text": "Allow Windows to import system locales automatically (Juan Jos\u00e9 Santamar\u00eda Flecha) \u00a7 Previously, only ICU locales could be imported on Windows.", "title": "Allow Windows to import system locales automatically", "commits": ["bf03cfd16"], "section": "Server / Localization", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-LOCALIZATION", "source_hash": "1af265b5c212c3639cc13d73bf99759881266358877b5472bc7afcbc91a5c866", "section_path": ["Server", "Localization"], "commit_groups": [["bf03cfd16"]], "identity_text": "Allow Windows to import system locales automatically (Juan Jos\u00e9 Santamar\u00eda Flecha) Previously, only ICU locales could be imported on Windows.", "commit_aliases": ["bf03cfd16"], "source_commits": ["bf03cfd16"], "source_entry_id": "16.0/changes/073", "db_id": "d003ced989446842e7b5f952f47d1884", "patch_ids": ["3513d766bbda0e27f7a9978041280e18"], "statement_hash": "07a431408c036210010ad9935e35d07d3d169bf8cbcef8c8c5e0e02d1cbd2086", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-8ac14bb4b9ddfe49", "migration": false}, {"id": "16.0-819668f5f15fb834", "cves": [], "html": "Allow logical decoding on standbys (Bertrand Drouvot, Andres Freund, Amit Khandekar) \u00a7 \u00a7 \u00a7
\nSnapshot WAL records are required for logical slot creation but cannot be created on standbys. To avoid delays, the new function pg_log_standby_snapshot() allows creation of such records.
Add server variable to control how logical decoding publishers transfer changes and how subscribers apply them (Shi Yu) \u00a7 \u00a7 \u00a7
\nThe variable is debug_logical_replication_streaming.
Allow logical replication initial table synchronization to copy rows in binary format (Melih Mutlu) \u00a7
\nThis is only possible for subscriptions marked as binary.
", "text": "Allow logical replication initial table synchronization to copy rows in binary format (Melih Mutlu) \u00a7 This is only possible for subscriptions marked as binary.", "title": "Allow logical replication initial table synchronization to copy rows in binary format", "commits": ["ecb696527"], "section": "Logical Replication", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-LOGICAL", "source_hash": "180167454b62cff42a55b4764041c0f3976cbff14a9aaa4512a6a6bab08efc26", "section_path": ["Logical Replication"], "commit_groups": [["ecb696527"]], "identity_text": "Allow logical replication initial table synchronization to copy rows in binary format (Melih Mutlu) This is only possible for subscriptions marked as binary.", "commit_aliases": ["ecb696527"], "source_commits": ["ecb696527"], "source_entry_id": "16.0/changes/076", "db_id": "2e40bd0cedd5d75513af5991297f2320", "patch_ids": ["0ff2ce3757263c87081e946022fd6107"], "statement_hash": "5c043ffd493ffb9998fc5b1200816cabc1fdfbb25c897608ea40c614df459069", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-64966e29f959ef15", "migration": false}, {"id": "16.0-0469c82ddaecaeb5", "cves": [], "html": "Allow parallel application of logical replication (Hou Zhijie, Wang Wei, Amit Kapila) \u00a7 \u00a7 \u00a7
\nThe CREATE SUBSCRIPTION STREAMING option now supports parallel to enable application of large transactions by parallel workers. The number of parallel workers is controlled by the new server variable max_parallel_apply_workers_per_subscription. Wait events LogicalParallelApplyMain, LogicalParallelApplyStateChange, and LogicalApplySendData were also added. Column leader_pid was added to system view pg_stat_subscription to track parallel activity.
Improve performance for logical replication apply without a primary key (Onder Kalaci, Amit Kapila) \u00a7
\nSpecifically, REPLICA IDENTITY FULL can now use btree indexes rather than sequentially scanning the table to find matches.
Allow logical replication subscribers to process only changes that have no origin (Vignesh C, Amit Kapila) \u00a7 \u00a7
\nThis can be used to avoid replication loops. This is controlled by the new CREATE SUBSCRIPTION ... ORIGIN option.
Perform logical replication SELECT and DML actions as the table owner (Robert Haas) \u00a7 \u00a7
This improves security and now requires subscription owners to be either superusers or to have SET ROLE permission on all roles owning tables in the replication set. The previous behavior of performing all operations as the subscription owner can be enabled with the subscription run_as_owner option.
Have wal_retrieve_retry_interval operate on a per-subscription basis (Nathan Bossart) \u00a7
Previously the retry time was applied globally. This also adds wait events >LogicalRepLauncherDSA and LogicalRepLauncherHash.
Add EXPLAIN option GENERIC_PLAN to display the generic plan for a parameterized query (Laurenz Albe) \u00a7
Allow a COPY FROM value to map to a column's DEFAULT (Israel Barth Rubio) \u00a7
Allow COPY into foreign tables to add rows in batches (Andrey Lepikhov, Etsuro Fujita) \u00a7
This is controlled by the postgres_fdw option batch_size.
Allow the STORAGE type to be specified by CREATE TABLE (Teodor Sigaev, Aleksander Alekseev) \u00a7 \u00a7
Previously only ALTER TABLE could control this.
Allow truncate triggers on foreign tables (Yugo Nagata) \u00a7
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This is accomplished by having VACUUM turn off PROCESS_MAIN or by vacuumdb using the --no-process-main option.
Add VACUUM options to skip or update all frozen statistics (Tom Lane, Nathan Bossart) \u00a7
The options are SKIP_DATABASE_STATS and ONLY_DATABASE_STATS.
Change REINDEX DATABASE and REINDEX SYSTEM to no longer require an argument (Simon Riggs) \u00a7 \u00a7
Previously the database name had to be specified.
", "text": "Change REINDEX DATABASE and REINDEX SYSTEM to no longer require an argument (Simon Riggs) \u00a7 \u00a7 Previously the database name had to be specified.", "title": "Change REINDEX DATABASE and REINDEX SYSTEM to no longer require an argument", "commits": ["0a5f06b84", "2cbc3c17a"], "section": "Utility Commands", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-UTILITY", "source_hash": "e035b9e1e70809bff54527a7e3d70be9050011107eb7f150dde9386006ab18e6", "section_path": ["Utility Commands"], "commit_groups": [["0a5f06b84"], ["2cbc3c17a"]], "identity_text": "Change REINDEX DATABASE and REINDEX SYSTEM to no longer require an argument (Simon Riggs) Previously the database name had to be specified.", "commit_aliases": ["0a5f06b84", "2cbc3c17a"], "source_commits": ["0a5f06b84", "2cbc3c17a"], "source_entry_id": "16.0/changes/089", "db_id": "cb5715aa1fddf34ed43b90514b03bc21", "patch_ids": ["92844ce33747d7e2426d82ea02840c62", "e53caa2334bbd1e5befcc0bdae91cb58"], "statement_hash": "bfbe5b5c1384c5857431b2b2b3a46ced6aa74870b3ca9c9659d2f27a6005caee", "relations": [{"rule": 2, "type": "related", "target": "c7098ee16ce798a7dcd85cd97890fc70", "evidence": {"same_day": true, "patch_ids": ["92844ce33747d7e2426d82ea02840c62", "e53caa2334bbd1e5befcc0bdae91cb58"]}}], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-7d8ce5f7ef6c52d0", "migration": false}, {"id": "16.0-32a0b5199feb99e8", "cves": [], "html": "Allow CREATE STATISTICS to generate a statistics name if none is specified (Simon Riggs) \u00a7
Allow non-decimal integer literals (Peter Eisentraut) \u00a7
\nFor example, 0x42F, 0o273, and 0b100101.
Allow NUMERIC to process hexadecimal, octal, and binary integers of any size (Dean Rasheed) \u00a7
Previously only unquoted eight-byte integers were supported with these non-decimal bases.
", "text": "Allow NUMERIC to process hexadecimal, octal, and binary integers of any size (Dean Rasheed) \u00a7 Previously only unquoted eight-byte integers were supported with these non-decimal bases.", "title": "Allow NUMERIC to process hexadecimal, octal, and binary integers of any size", "commits": ["6dfacbf72"], "section": "Data Types", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-DATATYPES", "source_hash": "f0916df08154e66510c0cedb912e3ab13c380bead5dfe82b9a0fd849365f7fb8", "section_path": ["Data Types"], "commit_groups": [["6dfacbf72"]], "identity_text": "Allow NUMERIC to process hexadecimal, octal, and binary integers of any size (Dean Rasheed) Previously only unquoted eight-byte integers were supported with these non-decimal bases.", "commit_aliases": ["6dfacbf72"], "source_commits": ["6dfacbf72"], "source_entry_id": "16.0/changes/092", "db_id": "7bb886e582680af9804b547b84f97599", "patch_ids": ["209c3a100a28e1974be2db481536f411"], "statement_hash": "93d6f0952a52f6f730637a82d5c981e4f7c8be1385eaa836e571159b5582b2d0", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-ea31ea395b3e7cba", "migration": false}, {"id": "16.0-bc123cded4eb6d01", "cves": [], "html": "Allow underscores in integer and numeric constants (Peter Eisentraut, Dean Rasheed) \u00a7
\nThis can improve readability for long strings of digits.
", "text": "Allow underscores in integer and numeric constants (Peter Eisentraut, Dean Rasheed) \u00a7 This can improve readability for long strings of digits.", "title": "Allow underscores in integer and numeric constants", "commits": ["faff8f8e4"], "section": "Data Types", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-DATATYPES", "source_hash": "398452e094762ba54012240eb995795e7f9a832bebc7062f3a5ca576e971ccb7", "section_path": ["Data Types"], "commit_groups": [["faff8f8e4"]], "identity_text": "Allow underscores in integer and numeric constants (Peter Eisentraut, Dean Rasheed) This can improve readability for long strings of digits.", "commit_aliases": ["faff8f8e4"], "source_commits": ["faff8f8e4"], "source_entry_id": "16.0/changes/093", "db_id": "f6c59a09d4f38841e49ea5f7b391be9e", "patch_ids": ["a13e0ad7973efa98d6a2de863d0d70af"], "statement_hash": "e81dc7c5fcd9e53d41eb054251984cd165ad6167b818edc2465fa40dec938be9", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-bc123cded4eb6d01", "migration": false}, {"id": "16.0-ac83d82f9b4111d6", "cves": [], "html": "Accept the spelling +infinity in datetime input (Vik Fearing) \u00a7
Prevent the specification of epoch and infinity together with other fields in datetime strings (Joseph Koshakow) \u00a7
Remove undocumented support for date input in the form Y (Joseph Koshakow) \u00a7yearMmonthDday
Add functions pg_input_is_valid() and pg_input_error_info() to check for type conversion errors (Tom Lane) \u00a7 \u00a7
Allow subqueries in the FROM clause to omit aliases (Dean Rasheed) \u00a7
Add support for enhanced numeric literals in SQL/JSON paths (Peter Eisentraut) \u00a7
\nFor example, allow hexadecimal, octal, and binary integers and underscores between digits.
", "text": "Add support for enhanced numeric literals in SQL/JSON paths (Peter Eisentraut) \u00a7 For example, allow hexadecimal, octal, and binary integers and underscores between digits.", "title": "Add support for enhanced numeric literals in SQL/JSON paths", "commits": ["102a5c164"], "section": "General Queries", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-GENERAL", "source_hash": "69f4dd7fbb8a795af40315cebcd58b312f0387ce7cc96f8e438cac077e359c5f", "section_path": ["General Queries"], "commit_groups": [["102a5c164"]], "identity_text": "Add support for enhanced numeric literals in SQL/JSON paths (Peter Eisentraut) For example, allow hexadecimal, octal, and binary integers and underscores between digits.", "commit_aliases": ["102a5c164"], "source_commits": ["102a5c164"], "source_entry_id": "16.0/changes/099", "db_id": "6c06b2084490dc400316bec3d5b69607", "patch_ids": ["8776124c5c726ab99ed1d992ed6840d4"], "statement_hash": "aedfa96f43a7357f43b768e64c2cfba113c7b3890d2b14e9a02c3668450110d7", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-ce2ae7b37a6a1a1e", "migration": false}, {"id": "16.0-1520d060e09d685d", "cves": [], "html": "Add SQL/JSON constructors (Nikita Glukhov, Teodor Sigaev, Oleg Bartunov, Alexander Korotkov, Amit Langote) \u00a7
\nThe new functions JSON_ARRAY(), JSON_ARRAYAGG(), JSON_OBJECT(), and JSON_OBJECTAGG() are part of the SQL standard.
Add SQL/JSON object checks (Nikita Glukhov, Teodor Sigaev, Oleg Bartunov, Alexander Korotkov, Amit Langote, Andrew Dunstan) \u00a7
\nThe IS JSON checks include checks for values, arrays, objects, scalars, and unique keys.
Allow JSON string parsing to use vector operations (John Naylor) \u00a7
", "text": "Allow JSON string parsing to use vector operations (John Naylor) \u00a7", "title": "Allow JSON string parsing to use vector operations", "commits": ["0a8de93a4"], "section": "Functions", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-FUNCTIONS", "source_hash": "54e4075955ad7bce6624a741e105ebe930ff5686ecfdea0dbca61119660929d1", "section_path": ["Functions"], "commit_groups": [["0a8de93a4"]], "identity_text": "Allow JSON string parsing to use vector operations (John Naylor)", "commit_aliases": ["0a8de93a4"], "source_commits": ["0a8de93a4"], "source_entry_id": "16.0/changes/102", "db_id": "33ef85cec1ecfe967586468e013771fb", "patch_ids": ["ef92e77cd0ae486d81920b30b4c2620e"], "statement_hash": "9be7a99c90ae976c512c9b0fe9925e5d9eb9b81f39a7e80a9410493265daad3d", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-a0d9d4c53aa9f4cd", "migration": false}, {"id": "16.0-1b7755b0b904b98c", "cves": [], "html": "Improve the handling of full text highlighting function ts_headline() for OR and NOT expressions (Tom Lane) \u00a7
Add functions to add, subtract, and generate timestamptz values in a specified time zone (Przemyslaw Sztoch, Gurjeet Singh) \u00a7
The functions are date_add(), date_subtract(), and generate_series().
Change date_trunc(unit, timestamptz, time_zone) to be an immutable function (Przemyslaw Sztoch) \u00a7
This allows the creation of expression indexes using this function.
", "text": "Change date_trunc(unit, timestamptz, time_zone) to be an immutable function (Przemyslaw Sztoch) \u00a7 This allows the creation of expression indexes using this function.", "title": "Change date_trunc(unit, timestamptz, time_zone) to be an immutable function", "commits": ["533e02e92"], "section": "Functions", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-FUNCTIONS", "source_hash": "5a48a89713a7623b999259e7e26597c649be2577cff3eb60b08f991264215a33", "section_path": ["Functions"], "commit_groups": [["533e02e92"]], "identity_text": "Change date_trunc(unit, timestamptz, time_zone) to be an immutable function (Przemyslaw Sztoch) This allows the creation of expression indexes using this function.", "commit_aliases": ["533e02e92"], "source_commits": ["533e02e92"], "source_entry_id": "16.0/changes/105", "db_id": "349b5bf1069668c2d9170487230d4e10", "patch_ids": ["66ebabb5d904527fa721903163f0f4f2"], "statement_hash": "fd7516d24b402751a2e6575d1a58270e83b97ff2b275cb03c4c9b718032e77ae", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-edea5414a4258ceb", "migration": false}, {"id": "16.0-369176d32d19854f", "cves": [], "html": "Add server variable SYSTEM_USER (Bertrand Drouvot) \u00a7
This reports the authentication method and its authenticated user.
", "text": "Add server variable SYSTEM_USER (Bertrand Drouvot) \u00a7 This reports the authentication method and its authenticated user.", "title": "Add server variable SYSTEM_USER", "commits": ["0823d061b"], "section": "Functions", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-FUNCTIONS", "source_hash": "3e532584493bd7cab5e49b4605c870cbc3e9ef9cca291cd4a3151f8d57ff9004", "section_path": ["Functions"], "commit_groups": [["0823d061b"]], "identity_text": "Add server variable SYSTEM_USER (Bertrand Drouvot) This reports the authentication method and its authenticated user.", "commit_aliases": ["0823d061b"], "source_commits": ["0823d061b"], "source_entry_id": "16.0/changes/106", "db_id": "135afabed066e907bf216dcbac0f7315", "patch_ids": ["84fe34ce3649263d604ff873140eb39f"], "statement_hash": "4e6fa6b3a3e98af1d197b0a6ad58f9ab083a84fb82afdb8a8c5e071b7a106b4b", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-369176d32d19854f", "migration": false}, {"id": "16.0-231381d88fb725ae", "cves": [], "html": "Add functions array_sample() and array_shuffle() (Martin Kalcher) \u00a7
Add aggregate function ANY_VALUE() which returns any value from a set (Vik Fearing) \u00a7
Add function random_normal() to supply normally-distributed random numbers (Paul Ramsey) \u00a7
Add error function erf() and its complement erfc() (Dean Rasheed) \u00a7
Improve the accuracy of numeric power() for integer exponents (Dean Rasheed) \u00a7
Add XMLSERIALIZE() option INDENT to pretty-print its output (Jim Jones) \u00a7
Change pg_collation_actual_version() to return a reasonable value for the default collation (Jeff Davis) \u00a7
Previously it returned NULL.
Allow pg_read_file() and pg_read_binary_file() to ignore missing files (Kyotaro Horiguchi) \u00a7
Add byte specification (B) to pg_size_bytes() (Peter Eisentraut) \u00a7
Allow to_reg* functions to accept numeric OIDs as input (Tom Lane) \u00a7
Add the ability to get the current function's OID in PL/pgSQL (Pavel Stehule) \u00a7
\nThis is accomplished with GET DIAGNOSTICS variable = PG_ROUTINE_OID.
Add libpq connection option require_auth to specify a list of acceptable authentication methods (Jacob Champion) \u00a7
This can also be used to disallow certain authentication methods.
", "text": "Add libpq connection option require_auth to specify a list of acceptable authentication methods (Jacob Champion) \u00a7 This can also be used to disallow certain authentication methods.", "title": "Add libpq connection option require_auth to specify a list of acceptable authentication methods", "commits": ["3a465cc67"], "section": "libpq", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-LIBPQ", "source_hash": "adf6433b4f99db13ef2bdb6cab0bc799f119576247271a5cb56994552f4e5bfb", "section_path": ["libpq"], "commit_groups": [["3a465cc67"]], "identity_text": "Add libpq connection option require_auth to specify a list of acceptable authentication methods (Jacob Champion) This can also be used to disallow certain authentication methods.", "commit_aliases": ["3a465cc67"], "source_commits": ["3a465cc67"], "source_entry_id": "16.0/changes/118", "db_id": "4c858bae325d824494991b29c7096b54", "patch_ids": ["f8268f5fea49d2462a659efb665976bd"], "statement_hash": "20ff871c05acfba16c44b4d7c2fa4c70987d6857a71f50d98c07ce7ce19d8004", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-deb6ad896df2c831", "migration": false}, {"id": "16.0-2d62ba8897ceb580", "cves": [], "html": "Allow multiple libpq-specified hosts to be randomly selected (Jelte Fennema) \u00a7 \u00a7
\nThis is enabled with load_balance_hosts=random and can be used for load balancing.
Add libpq option sslcertmode to control transmission of the client certificate (Jacob Champion) \u00a7
The option values are disable, allow, and require.
Allow libpq to use the system certificate pool for certificate verification (Jacob Champion, Thomas Habets) \u00a7
\nThis is enabled with sslrootcert=system, which also enables sslmode=verify-full.
Allow ECPG variable declarations to use typedef names that match unreserved SQL keywords (Tom Lane) \u00a7
This change does prevent keywords which match C typedef names from being processed as keywords in later EXEC SQL blocks.
Allow psql to control the maximum width of header lines in expanded format (Platon Pronko) \u00a7
\nThis is controlled by xheader_width.
Add psql command \\drg to show role membership details (Pavel Luzanov) \u00a7 \u00a7
The Member of output column has been removed from \\du and \\dg because this new command displays this information in more detail.
Allow psql's access privilege commands to show system objects (Nathan Bossart) \u00a7 \u00a7
\nThe options are \\dpS and \\zS.
Add FOREIGN designation to psql \\d+ for foreign table children and partitions (Ian Lawrence Barwick) \u00a7
Prevent \\df+ from showing function source code (Isaac Morland) \u00a7
Function bodies are more easily viewed with \\sf.
Allow psql to submit queries using the extended query protocol (Peter Eisentraut) \u00a7
\nPassing arguments to such queries is done using the new psql \\bind command.
Allow psql \\watch to limit the number of executions (Andrey Borodin) \u00a7
The \\watch options can now be named when specified.
Detect invalid values for psql \\watch, and allow zero to specify no delay (Andrey Borodin) \u00a7
Allow psql scripts to obtain the exit status of shell commands and queries (Corey Huinker, Tom Lane) \u00a7 \u00a7
\nThe new psql control variables are SHELL_ERROR and SHELL_EXIT_CODE.
Various psql tab completion improvements (Vignesh C, Aleksander Alekseev, Dagfinn Ilmari Manns\u00e5ker, Shi Yu, Michael Paquier, Ken Kato, Peter Smith) \u00a7 \u00a7 \u00a7 \u00a7 \u00a7 \u00a7 \u00a7 \u00a7 \u00a7 \u00a7 \u00a7 \u00a7
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", "text": "Add detailed descriptions of WAL records in pg_walinspect and pg_waldump (Melanie Plageman, Peter Geoghegan) \u00a7 \u00a7 \u00a7 \u00a7", "title": "Add detailed descriptions of WAL records in pg_walinspect and pg_waldump", "commits": ["1c453cfd8", "50547a3fa", "7d8219a44", "96149a180"], "section": "Additional Modules", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-MODULES", "source_hash": "35baccd29e5b73c196585a992763d68c054bbf217b0062aa749510c6590d5938", "section_path": ["Additional Modules"], "commit_groups": [["1c453cfd8"], ["50547a3fa"], ["7d8219a44"], ["96149a180"]], "identity_text": "Add detailed descriptions of WAL records in pg_walinspect and pg_waldump (Melanie Plageman, Peter Geoghegan)", "commit_aliases": ["1c453cfd8", "50547a3fa", "7d8219a44", "96149a180"], "source_commits": ["1c453cfd8", "50547a3fa", "7d8219a44", "96149a180"], "source_entry_id": "16.0/changes/181", "db_id": "32ac184b38df3d34e4563d19f078e118", "patch_ids": ["3d655fdbb65659afdc53cf32a2246c7d", "6cdd27196e5a886987fa108520222cb6", "c2ab4702effde42d240c1d9aa2109161", "c5fea9f5b11a07deb8814b84dd333a3f"], "statement_hash": "583f7c324ed716190056e2738055788f21979089e0b1dea389ed06186454514a", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-fb56b16685521e8a", "migration": false}, {"id": "16.0-a0ddacb9fab5c186-1", "cves": [], "html": "Add pageinspect function bt_multi_page_stats() to report statistics on multiple pages (Hamid Akhtar) \u00a7
This is similar to bt_page_stats() except it can report on a range of pages.
Add empty range output column to pageinspect function brin_page_items() (Tomas Vondra) \u00a7
Redesign archive modules to be more flexible (Nathan Bossart) \u00a7
\nInitialization changes will require modules written for older versions of Postgres to be updated.
", "text": "Redesign archive modules to be more flexible (Nathan Bossart) \u00a7 Initialization changes will require modules written for older versions of Postgres to be updated.", "title": "Redesign archive modules to be more flexible", "commits": ["35739b87d"], "section": "Additional Modules", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-MODULES", "source_hash": "ebfeef6642b2c1b53bbc6b947671b1e288832a43f2d6d8755238bbd3fa5ac995", "section_path": ["Additional Modules"], "commit_groups": [["35739b87d"]], "identity_text": "Redesign archive modules to be more flexible (Nathan Bossart) Initialization changes will require modules written for older versions of Postgres to be updated.", "commit_aliases": ["35739b87d"], "source_commits": ["35739b87d"], "source_entry_id": "16.0/changes/184", "db_id": "8650a1035448f521a7673e17478e6f4f", "patch_ids": ["3bbba7711288ab9a7a8df78914e0d8e9"], "statement_hash": "67e482b3d287b7654ddd6971450941da4b5af6d4ae9d9b9bce28b32b7a36c6f5", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-6932eb8bcd22f323", "migration": false}, {"id": "16.0-b826b2d0b45572fb", "cves": [], "html": "Correct inaccurate pg_stat_statements row tracking extended query protocol statements (Sami Imseih) \u00a7
", "text": "Correct inaccurate pg_stat_statements row tracking extended query protocol statements (Sami Imseih) \u00a7", "title": "Correct inaccurate pg_stat_statements row tracking extended query protocol statements", "commits": ["1d477a907"], "section": "Additional Modules", "category": "bugfix", "source_url": "/docs/release/16.0/#RELEASE-16-MODULES", "source_hash": "0aaf0d21f909615d41e533c757e3ecc52e883c89a8dd5208321c497fecf23067", "section_path": ["Additional Modules"], "commit_groups": [["1d477a907"]], "identity_text": "Correct inaccurate pg_stat_statements row tracking extended query protocol statements (Sami Imseih)", "commit_aliases": ["1d477a907"], "source_commits": ["1d477a907"], "source_entry_id": "16.0/changes/185", "db_id": "551aaad464f86fd0c3e5f46908da5a30", "patch_ids": ["11ffe5bc6427ad33f15d61aaf3f3d9bc"], "statement_hash": "7537f6e4611d7e1ee76ae1cc5f1acd6bd610cd71afdbbba33bb093becec8720a", "relations": [], "category_label": "Bug fixes", "url": "/docs/compare/?release=16.0#16.0-b826b2d0b45572fb", "migration": false}, {"id": "16.0-dcd45be86b4dcd66", "cves": [], "html": "Add pg_buffercache function pg_buffercache_usage_counts() to report usage totals (Nathan Bossart) \u00a7
Add pg_buffercache function pg_buffercache_summary() to report summarized buffer statistics (Melih Mutlu) \u00a7
Allow the schemas of required extensions to be referenced in extension scripts using the new syntax @extschema:referenced_extension_name@ (Regina Obe) \u00a7
Allow required extensions to be marked as non-relocatable using no_relocate (Regina Obe) \u00a7
This allows @extschema:referenced_extension_name@ to be treated as a constant for the lifetime of the extension.
Allow postgres_fdw to do aborts in parallel (Etsuro Fujita) \u00a7
\nThis is enabled with postgres_fdw option parallel_abort.
Make ANALYZE on foreign postgres_fdw tables more efficient (Tomas Vondra) \u00a7
The postgres_fdw option analyze_sampling controls the sampling method.
Restrict shipment of reg* type constants in postgres_fdw to those referencing built-in objects or extensions marked as shippable (Tom Lane) \u00a7
Have postgres_fdw and dblink handle interrupts during connection establishment (Andres Freund) \u00a7
", "text": "Have postgres_fdw and dblink handle interrupts during connection establishment (Andres Freund) \u00a7", "title": "Have postgres_fdw and dblink handle interrupts during connection establishment", "commits": ["e4602483e"], "section": "Additional Modules / postgres_fdw", "category": "feature", "source_url": "/docs/release/16.0/#RELEASE-16-PGFDW", "source_hash": "5e073879fe41f91a2b361c83edf3616e74c1bda8f5fb9cc6389c5ea42925e8e3", "section_path": ["Additional Modules", "postgres_fdw"], "commit_groups": [["e4602483e"]], "identity_text": "Have postgres_fdw and dblink handle interrupts during connection establishment (Andres Freund)", "commit_aliases": ["e4602483e"], "source_commits": ["e4602483e"], "source_entry_id": "16.0/changes/193", "db_id": "fa879a93807bf4b2740087c34b5a9c0e", "patch_ids": ["159ed2d7ad9e527a9bd47d64ccfc2af1"], "statement_hash": "c92727d90f7bda9f71b90d55ea3d922fe1f69893065430181dc875d786422720", "relations": [], "category_label": "Features", "url": "/docs/compare/?release=16.0#16.0-abf78b9ed43671af", "migration": false}], "initial_entry_count": 206, "migration_html": "A dump/restore using pg_dumpall or use of pg_upgrade or logical replication is required for those wishing to migrate data from any previous release. See Section\u00a019.6 for general information on migrating to new major releases.
\nVersion 16 contains a number of changes that may affect compatibility with previous releases. Observe the following incompatibilities:
\n