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 18.6 for general information on migrating to new major releases.
\nVersion 17 contains a number of changes that may affect compatibility with previous releases. Observe the following incompatibilities:
\nA 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 18.6 for general information on migrating to new major releases.
\nVersion 17 contains a number of changes that may affect compatibility with previous releases. Observe the following incompatibilities:
\nChange functions to use a safe search_path during maintenance operations (Jeff Davis) § §
\nThis prevents maintenance operations (ANALYZE, CLUSTER, CREATE INDEX, CREATE MATERIALIZED VIEW, REFRESH MATERIALIZED VIEW, REINDEX, or VACUUM) from performing unsafe access. Functions used by expression indexes and materialized views that need to reference non-default schemas must specify a search path during function creation.
Restrict ago to only appear at the end in interval values (Joseph Koshakow) § §
Also, prevent empty interval units from appearing multiple times.
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Remove feature which simulated per-database users (Nathan Bossart) §
\nThe feature, db_user_namespace, was rarely used.
Remove adminpack contrib extension (Daniel Gustafsson) §
\nThis was used by now end-of-life pgAdmin III.
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Change file boundary handling of two WAL file name functions (Kyotaro Horiguchi, Andres Freund, Bruce Momjian) §
\nThe functions pg_walfile_name() and pg_walfile_name_offset() used to report the previous LSN segment number when the LSN was on a file segment boundary; it now returns the current LSN segment.
Remove server variable trace_recovery_messages since it is no longer needed (Bharath Rupireddy) §
Remove information schema column element_types.domain_default (Peter Eisentraut) §
Change pgrowlocks lock mode output labels (Bruce Momjian) §
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Rename I/O block read/write timing statistics columns of pg_stat_statements (Nazir Bilal Yavuz) §
\nThis renames blk_read_time to shared_blk_read_time, and blk_write_time to shared_blk_write_time.
Change pg_attribute.attstattarget and pg_statistic_ext.stxstattarget to represent the default statistics target as NULL (Peter Eisentraut) § §
Rename pg_collation.colliculocale to colllocale and pg_database.daticulocale to datlocale (Jeff Davis) §
Rename pg_stat_progress_vacuum column max_dead_tuples to max_dead_tuple_bytes, rename num_dead_tuples to num_dead_item_ids, and add dead_tuple_bytes (Masahiko Sawada) § §
Rename SLRU columns in system view pg_stat_slru (Alvaro Herrera) §
The column names accepted by pg_stat_reset_slru() are also changed.
Allow the optimizer to improve CTE plans by considering the statistics and sort order of columns referenced in earlier row output clauses (Jian Guo, Richard Guo, Tom Lane) § §
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Allow partition pruning on boolean columns on IS [NOT] UNKNOWN conditionals (David Rowley) §
Improve optimization of range values when using containment operators <@ and @> (Kim Johan Andersson, Jian He) §
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Allow query nodes to be run in parallel in more cases (Tom Lane) §
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This can be disabled using server variable enable_group_by_reordering.
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Fix MergeAppend plans to more accurately compute the number of rows that need to be sorted (Alexander Kuzmenkov) §
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Add columns to pg_stats to report range-type histogram information (Egor Rogov, Soumyadeep Chakraborty) §
Allow btree indexes to more efficiently find a set of values, such as those supplied by IN clauses using constants (Peter Geoghegan, Matthias van de Meent) §
Allow BRIN indexes to be created using parallel workers (Tomas Vondra, Matthias van de Meent) §
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\nWAL traffic caused by vacuum is also more compact.
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", "text": "Improve performance when transferring large blocks of data to a client (Melih Mutlu) §", "title": "Improve performance when transferring large blocks of data to a client", "commits": ["c4ab7da60"], "section": "Server / General Performance", "category": "performance", "source_url": "/docs/release/17.0/#RELEASE-17-PERFORMANCE", "source_hash": "a9949c4f225707e425c687c60c71aa6f226a4d17fd57a7e488fb8504b40228ff", "section_path": ["Server", "General Performance"], "commit_groups": [["c4ab7da60"]], "identity_text": "Improve performance when transferring large blocks of data to a client (Melih Mutlu)", "commit_aliases": ["c4ab7da60"], "source_commits": ["c4ab7da60"], "source_entry_id": "17.0/changes/021", "db_id": "a8be4eab6c4155c2f1a285c8a63fbf57", "patch_ids": ["4a4db20a21552518a62918f9ed5ac8ae"], "statement_hash": "6c2257fb99e4b22d3aa1a5f070824710925a378ef24d8f53f3ffcb8d508fd612", "relations": [], "version": "17.0", "category_label": "Performance", "also_in": [], "variants": [], "related_changes": []}, {"id": "17.0-151769829143be40", "cves": [], "html": "Allow the grouping of file system reads with the new system variable io_combine_limit (Thomas Munro, Andres Freund, Melanie Plageman, Nazir Bilal Yavuz) § § §
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Relevant columns have been removed from pg_stat_bgwriter and added to this new system view.
Improve control over resetting statistics (Atsushi Torikoshi, Bharath Rupireddy) § § §
\nAllow pg_stat_reset_shared() (with no arguments) and pg_stat_reset_shared(NULL) to reset all shared statistics. Allow pg_stat_reset_shared('slru') and pg_stat_reset_slru() (with no arguments) to reset SLRU statistics, which was already possible with pg_stat_reset_slru(NULL).
Add log messages related to WAL recovery from backups (Andres Freund) §
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Add log message to report walsender acquisition and release of replication slots (Bharath Rupireddy) §
\nThis is enabled by the server variable log_replication_commands.
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This is useful for adding descriptions to wait events reported in pg_stat_activity.
Add wait events for checkpoint delays (Thomas Munro) §
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\nThis appears in system view pg_stat_progress_vacuum columns indexes_total and indexes_processed.
Allow granting the right to perform maintenance operations (Nathan Bossart) §
\nThe permission can be granted on a per-table basis using the MAINTAIN privilege and on a per-role basis via the pg_maintain predefined role. Permitted operations are VACUUM, ANALYZE, REINDEX, REFRESH MATERIALIZED VIEW, CLUSTER, and LOCK TABLE.
Allow roles with pg_monitor membership to execute pg_current_logfile() (Pavlo Golub, Nathan Bossart) §
Add system variable allow_alter_system to disallow ALTER SYSTEM (Jelte Fennema-Nio, Gabriele Bartolini) §
Allow ALTER SYSTEM to set unrecognized custom server variables (Tom Lane) §
This is also possible with GRANT ON PARAMETER.
Add server variable transaction_timeout to restrict the duration of transactions (Andrey Borodin, Japin Li, Junwang Zhao, Alexander Korotkov) § § §
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\nThis supports C and C.UTF-8 collations.
Add server variable huge_pages_status to report the use of huge pages by Postgres (Justin Pryzby) §
\nThis is useful when huge_pages is set to try.
Add server variable to disable event triggers (Daniel Gustafsson) §
\nThe setting, event_triggers, allows for the temporary disabling of event triggers for debugging.
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\nThe new server variables are commit_timestamp_buffers, multixact_member_buffers, multixact_offset_buffers, notify_buffers, serializable_buffers, subtransaction_buffers, and transaction_buffers. commit_timestamp_buffers, transaction_buffers, and subtransaction_buffers scale up automatically with shared_buffers.
", "text": "Allow the SLRU cache sizes to be configured (Andrey Borodin, Dilip Kumar, Alvaro Herrera) § The new server variables are commit_timestamp_buffers, multixact_member_buffers, multixact_offset_buffers, notify_buffers, serializable_buffers, subtransaction_buffers, and transaction_buffers. commit_timestamp_buffers, transaction_buffers, and subtransaction_buffers scale up automatically with shared_buffers.", "title": "Allow the SLRU cache sizes to be configured", "commits": ["53c2a97a9"], "section": "Server / Server Configuration", "category": "feature", "source_url": "/docs/release/17.0/#RELEASE-17-SERVER-CONFIG", "source_hash": "6882b1afc0cfb0edf0a305155b1bfeee49505c75e159d2908fe7dded3370087d", "section_path": ["Server", "Server Configuration"], "commit_groups": [["53c2a97a9"]], "identity_text": "Allow the SLRU cache sizes to be configured (Andrey Borodin, Dilip Kumar, Alvaro Herrera) The new server variables are guc-commit-timestamp-buffers , guc-multixact-member-buffers , guc-multixact-offset-buffers , guc-notify-buffers , guc-serializable-buffers , guc-subtransaction-buffers , and guc-transaction-buffers . guc-commit-timestamp-buffers , guc-transaction-buffers , and guc-subtransaction-buffers scale up automatically with guc-shared-buffers .", "commit_aliases": ["53c2a97a9"], "source_commits": ["53c2a97a9"], "source_entry_id": "17.0/changes/039", "db_id": "054128c86cceaeccedc6fb785d67772f", "patch_ids": ["d22fe7881bafeca870baef76553a72ff"], "statement_hash": "7b33810afb851570f8c712e0489c6284bff4903bfc6947e2ceae3d857387e453", "relations": [], "version": "17.0", "category_label": "Features", "also_in": [], "variants": [], "related_changes": []}, {"id": "17.0-a2ffbdd97c0a238d", "cves": [], "html": "Add support for incremental file system backup (Robert Haas, Jakub Wartak, Tomas Vondra) § §
\nIncremental backups can be created using pg_basebackup's new --incremental option. The new application pg_combinebackup allows manipulation of base and incremental file system backups.
Allow the creation of WAL summarization files (Robert Haas, Nathan Bossart, Hubert Depesz Lubaczewski) § § § §
\nThese files record the block numbers that have changed within an LSN range and are useful for incremental file system backups. This is controlled by the server variables summarize_wal and wal_summary_keep_time, and introspected with pg_available_wal_summaries(), pg_wal_summary_contents(), and pg_get_wal_summarizer_state().
Add the system identifier to file system backup manifest files (Amul Sul) §
\nThis helps detect invalid WAL usage.
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Add column pg_replication_slots.invalidation_reason to report the reason for invalid slots (Shveta Malik, Bharath Rupireddy) § §
Add column pg_replication_slots.inactive_since to report slot inactivity duration (Bharath Rupireddy) § § §
Add function pg_sync_replication_slots() to synchronize logical replication slots (Hou Zhijie, Shveta Malik, Ajin Cherian, Peter Eisentraut) § §
Add the failover property to the replication protocol (Hou Zhijie, Shveta Malik) §
Add application pg_createsubscriber to create a logical replica from a physical standby server (Euler Taveira) §
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\nThis allows logical replication to continue quickly after the upgrade. This only works for old PostgreSQL clusters that are version 17 or later.
", "text": "Have pg_upgrade migrate valid logical slots and subscriptions (Hayato Kuroda, Hou Zhijie, Vignesh C, Julien Rouhaud, Shlok Kyal) § § This allows logical replication to continue quickly after the upgrade. This only works for old PostgreSQL clusters that are version 17 or later.", "title": "Have pg_upgrade migrate valid logical slots and subscriptions", "commits": ["29d0a77fa", "9a17be1e2"], "section": "Server / Logical Replication", "category": "feature", "source_url": "/docs/release/17.0/#RELEASE-17-LOGICAL", "source_hash": "54eeccdb18fb7fd67a8f61d23a838b094fd46401996f83cb044a29d7eaf1a0ee", "section_path": ["Server", "Logical Replication"], "commit_groups": [["29d0a77fa"], ["9a17be1e2"]], "identity_text": "Have pg_upgrade migrate valid logical slots and subscriptions (Hayato Kuroda, Hou Zhijie, Vignesh C, Julien Rouhaud, Shlok Kyal) This allows logical replication to continue quickly after the upgrade. This only works for old PostgreSQL clusters that are version 17 or later.", "commit_aliases": ["29d0a77fa", "9a17be1e2"], "source_commits": ["29d0a77fa", "9a17be1e2"], "source_entry_id": "17.0/changes/049", "db_id": "e7e439b9160cab86c5bf72fcd5dc5ffd", "patch_ids": ["46c515d821dc69b7fb156f5163a38761", "79d297e1202815a7d2282b5617914920"], "statement_hash": "46e644aff19fc32497f2502ae839da451b4b9e32e84dbac888aa1709a3b79c77", "relations": [], "version": "17.0", "category_label": "Features", "also_in": [], "variants": [], "related_changes": []}, {"id": "17.0-6bc1e01f860f7749", "cves": [], "html": "Enable the failover of logical slots (Hou Zhijie, Shveta Malik, Ajin Cherian) §
\nThis is controlled by an optional fifth argument to pg_create_logical_replication_slot().
Add server variable sync_replication_slots to enable failover logical slot synchronization (Shveta Malik, Hou Zhijie, Peter Smith) § §
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Allow the application of logical replication changes to use hash indexes on the subscriber (Hayato Kuroda) §
\nPreviously only btree indexes could be used for this purpose.
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", "text": "Improve logical decoding performance in cases where there are many subtransactions (Masahiko Sawada) §", "title": "Improve logical decoding performance in cases where there are many subtransactions", "commits": ["5bec1d6bc"], "section": "Server / Logical Replication", "category": "performance", "source_url": "/docs/release/17.0/#RELEASE-17-LOGICAL", "source_hash": "907b0bb80ba99cfe8b07a8ecdc8cac23e9cd50d50d62860fbc58de910fd10091", "section_path": ["Server", "Logical Replication"], "commit_groups": [["5bec1d6bc"]], "identity_text": "Improve logical decoding performance in cases where there are many subtransactions (Masahiko Sawada)", "commit_aliases": ["5bec1d6bc"], "source_commits": ["5bec1d6bc"], "source_entry_id": "17.0/changes/054", "db_id": "13e9e56d75399c0a3d2a68e52c334106", "patch_ids": ["3790ad2bce6b204989db4719e2fe2d72"], "statement_hash": "72c2381cddbfa5a317e6d3bbf449f9d9c82a35ed6b428c4b5f6d7a262eb800ec", "relations": [], "version": "17.0", "category_label": "Performance", "also_in": [], "variants": [], "related_changes": []}, {"id": "17.0-0379fc88a56a2698", "cves": [], "html": "Restart apply workers if subscription owner's superuser privileges are revoked (Vignesh C) §
\nThis forces reauthentication.
", "text": "Restart apply workers if subscription owner's superuser privileges are revoked (Vignesh C) § This forces reauthentication.", "title": "Restart apply workers if subscription owner's superuser privileges are revoked", "commits": ["79243de13"], "section": "Server / Logical Replication", "category": "feature", "source_url": "/docs/release/17.0/#RELEASE-17-LOGICAL", "source_hash": "f8f586d461a36e84ccd0c5fb60653e1130c50a1b5022a7f721796654600851cb", "section_path": ["Server", "Logical Replication"], "commit_groups": [["79243de13"]], "identity_text": "Restart apply workers if subscription owner's superuser privileges are revoked (Vignesh C) This forces reauthentication.", "commit_aliases": ["79243de13"], "source_commits": ["79243de13"], "source_entry_id": "17.0/changes/055", "db_id": "4545b17ab8113547542da114c77d5573", "patch_ids": ["64d8f5d679a4beaf4606e9c3ef1d7e5a"], "statement_hash": "b2198c55fb50f158b72cadb4b806fc3ca139464035a44556ba7aa7f47684a3f3", "relations": [], "version": "17.0", "category_label": "Features", "also_in": [], "variants": [], "related_changes": []}, {"id": "17.0-b100fe52b2dd78c7", "cves": [], "html": "Add flush option to pg_logical_emit_message() (Michael Paquier) §
This makes the message durable.
", "text": "Add flush option to pg_logical_emit_message() (Michael Paquier) § This makes the message durable.", "title": "Add flush option to pg_logical_emit_message()", "commits": ["173b56f1e"], "section": "Server / Logical Replication", "category": "feature", "source_url": "/docs/release/17.0/#RELEASE-17-LOGICAL", "source_hash": "7d9eb5bcd667d310d84bd4d4bdb365d37eaba933d0549184f7f8c8cbf6756991", "section_path": ["Server", "Logical Replication"], "commit_groups": [["173b56f1e"]], "identity_text": "Add flush option to pg_logical_emit_message() (Michael Paquier) This makes the message durable.", "commit_aliases": ["173b56f1e"], "source_commits": ["173b56f1e"], "source_entry_id": "17.0/changes/056", "db_id": "d85be09c70a59028ea78df7318a28627", "patch_ids": ["d5627808d42f38ca807d7013e994b1ab"], "statement_hash": "dd1b3a50f262acdfeeacf766d8d2e1f81b58a5231666d1eb453b6183a1864e25", "relations": [], "version": "17.0", "category_label": "Features", "also_in": [], "variants": [], "related_changes": []}, {"id": "17.0-030fbaca704c043c", "cves": [], "html": "Allow specification of physical standbys that must be synchronized before they are visible to subscribers (Hou Zhijie, Shveta Malik) § §
\nThe new server variable is synchronized_standby_slots.
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Add new COPY option ON_ERROR ignore to discard error rows (Damir Belyalov, Atsushi Torikoshi, Alex Shulgin, Jian He, Yugo Nagata) § § § §
The default behavior is ON_ERROR stop.
Add new COPY option LOG_VERBOSITY which reports COPY FROM ignored error rows (Bharath Rupireddy) §
Allow COPY FROM to report the number of skipped rows during processing (Atsushi Torikoshi) §
This appears in system view column pg_stat_progress_copy.tuples_skipped.
In COPY FROM, allow easy specification that all columns should be forced null or not null (Zhang Mingli) §
Allow partitioned tables to have identity columns (Ashutosh Bapat) §
", "text": "Allow partitioned tables to have identity columns (Ashutosh Bapat) §", "title": "Allow partitioned tables to have identity columns", "commits": ["699586315"], "section": "Utility Commands", "category": "feature", "source_url": "/docs/release/17.0/#RELEASE-17-UTILITY", "source_hash": "d6773ffc45256b40173b8f32f1599e692da3f22be3112807add72e473449cee7", "section_path": ["Utility Commands"], "commit_groups": [["699586315"]], "identity_text": "Allow partitioned tables to have identity columns (Ashutosh Bapat)", "commit_aliases": ["699586315"], "source_commits": ["699586315"], "source_entry_id": "17.0/changes/063", "db_id": "d68483b69562373262a0bcbf0eb8f379", "patch_ids": ["e223295279c5c1549441d329e725f1f5"], "statement_hash": "0c352aff4194ec7d6aa8b23e700fce9724023fec4040a6c696163d485698550f", "relations": [], "version": "17.0", "category_label": "Features", "also_in": [], "variants": [], "related_changes": []}, {"id": "17.0-079d055c5ec37287", "cves": [], "html": "Allow exclusion constraints on partitioned tables (Paul A. Jungwirth) §
\nAs long as exclusion constraints compare partition key columns for equality, other columns can use exclusion constraint-specific comparisons.
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The new syntax is ALTER TABLE ... SET STATISTICS DEFAULT; using SET STATISTICS -1 is still supported.
Allow ALTER TABLE to change a column's generation expression (Amul Sul) §
The syntax is ALTER TABLE ... ALTER COLUMN ... SET EXPRESSION.
Allow specification of table access methods on partitioned tables (Justin Pryzby, Soumyadeep Chakraborty, Michael Paquier) § §
", "text": "Allow specification of table access methods on partitioned tables (Justin Pryzby, Soumyadeep Chakraborty, Michael Paquier) § §", "title": "Allow specification of table access methods on partitioned tables", "commits": ["374c7a229", "e2395cdbe"], "section": "Utility Commands", "category": "feature", "source_url": "/docs/release/17.0/#RELEASE-17-UTILITY", "source_hash": "58ed2b89b695cb6bf19b0e65b5b8685c2c18e39550cbd5917765d539c98e57f3", "section_path": ["Utility Commands"], "commit_groups": [["374c7a229"], ["e2395cdbe"]], "identity_text": "Allow specification of table access methods on partitioned tables (Justin Pryzby, Soumyadeep Chakraborty, Michael Paquier)", "commit_aliases": ["374c7a229", "e2395cdbe"], "source_commits": ["374c7a229", "e2395cdbe"], "source_entry_id": "17.0/changes/067", "db_id": "62582f5907336949f9efd19673964ecc", "patch_ids": ["d8c678c4367013caa41719514512deaa", "e5b02f4aca72c82315ce2a39bff0c870"], "statement_hash": "a705a4cebfc30dc70c9ce00a90e9adaf7fa9a90303224410fe646bf4e61547a8", "relations": [], "version": "17.0", "category_label": "Features", "also_in": [], "variants": [], "related_changes": []}, {"id": "17.0-75769028fb5c9206", "cves": [], "html": "Add DEFAULT setting for ALTER TABLE .. SET ACCESS METHOD (Michael Paquier) §
Add support for event triggers that fire at connection time (Konstantin Knizhnik, Mikhail Gribkov) §
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Allow parenthesized syntax for CLUSTER options if a table name is not specified (Nathan Bossart) §
Allow EXPLAIN to report optimizer memory usage (Ashutosh Bapat) §
The option is called MEMORY.
Add EXPLAIN option SERIALIZE to report the cost of converting data for network transmission (Stepan Rutz, Matthias van de Meent) §
Add local I/O block read/write timing statistics to EXPLAIN's BUFFERS output (Nazir Bilal Yavuz) §
Improve EXPLAIN's display of SubPlan nodes and output parameters (Tom Lane, Dean Rasheed) §
Add JIT deform_counter details to EXPLAIN (Dmitry Dolgov) §
Allow the interval data type to support +/-infinity values (Joseph Koshakow, Jian He, Ashutosh Bapat) §
Allow the use of an ENUM added via ALTER TYPE if the type was created in the same transaction (Tom Lane) §
This was previously disallowed.
", "text": "Allow the use of an ENUM added via ALTER TYPE if the type was created in the same transaction (Tom Lane) § This was previously disallowed.", "title": "Allow the use of an ENUM added via ALTER TYPE if the type was created in the same transaction", "commits": ["af1d39584"], "section": "Data Types", "category": "feature", "source_url": "/docs/release/17.0/#RELEASE-17-DATATYPES", "source_hash": "1b54e6f54d9debea581b57bd116ccdd1ca2f74bab99289355269d7fc57624785", "section_path": ["Data Types"], "commit_groups": [["af1d39584"]], "identity_text": "Allow the use of an ENUM added via ALTER TYPE if the type was created in the same transaction (Tom Lane) This was previously disallowed.", "commit_aliases": ["af1d39584"], "source_commits": ["af1d39584"], "source_entry_id": "17.0/changes/078", "db_id": "bb4b92fac7d7bf27bbf2a3c676960bb1", "patch_ids": ["4a8aa96d2b3f72c17cca83bb033799f9"], "statement_hash": "df9e6a22a08482e477e5d5f873e5f54b9cd9b8aa522560fdc6cac13d9137c604", "relations": [], "version": "17.0", "category_label": "Features", "also_in": [], "variants": [], "related_changes": []}, {"id": "17.0-f678dfc6392caa4d", "cves": [], "html": "Allow MERGE to modify updatable views (Dean Rasheed) §
Add WHEN NOT MATCHED BY SOURCE to MERGE (Dean Rasheed) §
WHEN NOT MATCHED on target rows was already supported.
Allow MERGE to use the RETURNING clause (Dean Rasheed) §
The new RETURNING function merge_action() reports on the DML that generated the row.
Add function JSON_TABLE() to convert JSON data to a table representation (Nikita Glukhov, Teodor Sigaev, Oleg Bartunov, Alexander Korotkov, Andrew Dunstan, Amit Langote, Jian He) § §
This function can be used in the FROM clause of SELECT queries as a tuple source.
Add SQL/JSON constructor functions JSON(), JSON_SCALAR(), and JSON_SERIALIZE() (Nikita Glukhov, Teodor Sigaev, Oleg Bartunov, Alexander Korotkov, Andrew Dunstan, Amit Langote) §
Add SQL/JSON query functions JSON_EXISTS(), JSON_QUERY(), and JSON_VALUE() (Nikita Glukhov, Teodor Sigaev, Oleg Bartunov, Alexander Korotkov, Andrew Dunstan, Amit Langote, Peter Eisentraut, Jian He) § § § § §
Add jsonpath methods to convert JSON values to other JSON data types (Jeevan Chalke) §
The jsonpath methods are .bigint(), .boolean(), .date(), .decimal([precision [, scale]]), .integer(), .number(), .string(), .time(), .time_tz(), .timestamp(), and .timestamp_tz().
Add to_timestamp() time zone format specifiers (Tom Lane) §
TZ accepts time zone abbreviations or numeric offsets, while OF accepts only numeric offsets.
Allow the session time zone to be specified by AT LOCAL (Vik Fearing) §
This is useful when converting adding and removing time zones from time stamps values, rather than specifying the literal session time zone.
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Add functions to generate random numbers in a specified range (Dean Rasheed) §
\nThe functions are random(min, max) and they take values of type integer, bigint, and numeric.
Add functions to convert integers to binary and octal strings (Eric Radman, Nathan Bossart) §
\nThe functions are to_bin() and to_oct().
Add Unicode informational functions (Jeff Davis) §
\nFunction unicode_version() returns the Unicode version, icu_unicode_version() returns the ICU version, and unicode_assigned() returns if the characters are assigned Unicode codepoints.
Add function xmltext() to convert text to a single XML text node (Jim Jones) §
Add function to_regtypemod() to return the type modifier of a type specification (David Wheeler, Erik Wienhold) §
Add pg_basetype() function to return a domain's base type (Steve Chavez) §
Add function pg_column_toast_chunk_id() to return a value's TOAST identifier (Yugo Nagata) §
This returns NULL if the value is not stored in TOAST.
Allow plpgsql %TYPE and %ROWTYPE specifications to represent arrays of non-array types (Quan Zongliang, Pavel Stehule) §
Allow plpgsql %TYPE specification to reference composite column (Tom Lane) §
Add libpq function to change role passwords (Joe Conway) §
\nThe new function, PQchangePassword(), hashes the new password before sending it to the server.
Add libpq functions to close portals and prepared statements (Jelte Fennema-Nio) §
\nThe functions are PQclosePrepared(), PQclosePortal(), PQsendClosePrepared(), and PQsendClosePortal().
Add libpq API which allows for blocking and non-blocking cancel requests, with encryption if already in use (Jelte Fennema-Nio) §
\nPreviously only blocking, unencrypted cancel requests were supported.
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Add libpq function PQsendPipelineSync() to send a pipeline synchronization point (Anton Kirilov) §
This is similar to PQpipelineSync() but it does not flush to the server unless the size threshold of the output buffer is reached.
Add libpq function PQsetChunkedRowsMode() to allow retrieval of results in chunks (Daniel Vérité) §
Allow TLS connections without requiring a network round-trip negotiation (Greg Stark, Heikki Linnakangas, Peter Eisentraut, Michael Paquier, Daniel Gustafsson) § § § § § § § §
\nThis is enabled with the client-side option sslnegotiation=direct, requires ALPN, and only works on PostgreSQL 17 and later servers.
Improve psql display of default and empty privileges (Erik Wienhold, Laurenz Albe) §
\nCommand \\dp now displays (none) for empty privileges; default still displays as empty.
Have backslash commands honor \\pset null (Erik Wienhold, Laurenz Albe) §
Previously \\pset null was ignored.
Allow psql's \\watch to stop after a minimum number of rows returned (Greg Sabino Mullane) §
The parameter is min_rows.
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Improve psql tab completion (Dagfinn Ilmari Mannsåker, Gilles Darold, Christoph Heiss, Steve Chavez, Vignesh C, Pavel Borisov, Jian He) § § § § § § § §
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Add the --sync-method parameter to several client applications (Justin Pryzby, Nathan Bossart) §
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Add pgbench option --exit-on-abort to exit after any client aborts (Yugo Nagata) §
Add pgbench command \\syncpipeline to allow sending of sync messages (Anthonin Bonnefoy) §
Allow pg_archivecleanup to remove backup history files (Atsushi Torikoshi) §
\nThe option is --clean-backup-history.
Add some long options to pg_archivecleanup (Atsushi Torikoshi) §
\nThe long options are --debug, --dry-run, and --strip-extension.
Allow pg_basebackup and pg_receivewal to use dbname in their connection specification (Jelte Fennema-Nio) §
\nThis is useful for connection poolers that are sensitive to the database name.
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This is supported on Linux and FreeBSD.
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Allow reindexdb, vacuumdb, and clusterdb to process objects in all databases matching a pattern (Nathan Bossart) § § §
\nThe new option --all controls this behavior.
Remove support for OpenSSL 1.0.1 (Michael Paquier) §
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Replace the two-phase commit GIDs stored in pg_stat_statements with placeholders (Michael Paquier) §
This greatly reduces the number of entries needed to record PREPARE TRANSACTION, COMMIT PREPARED, and ROLLBACK PREPARED.
Track DEALLOCATE in pg_stat_statements (Dagfinn Ilmari Mannsåker, Michael Paquier) §
DEALLOCATE names are stored in pg_stat_statements as placeholders.
Add local I/O block read/write timing statistics columns of pg_stat_statements (Nazir Bilal Yavuz) § §
The new columns are local_blk_read_time and local_blk_write_time.
Add JIT deform_counter details to pg_stat_statements (Dmitry Dolgov) §
Add optional fourth argument (minmax_only) to pg_stat_statements_reset() to allow for the resetting of only min/max statistics (Andrei Zubkov) §
This argument defaults to false.
Add pg_stat_statements columns stats_since and minmax_stats_since to track entry creation time and last min/max reset time (Andrei Zubkov) §