<!-- doc/src/sgml/release-18.sgml -->
<!-- See header comment in release.sgml about typical markup -->
-<sect1 id="release-18">
- <title>Release 18</title>
+ <sect1 id="release-18">
+ <title>Release 18</title>
- <formalpara>
- <title>Release date:</title>
- <para>2025-??-??</para>
- </formalpara>
+ <formalpara>
+ <title>Release date:</title>
+ <para>2025-??-??, CURRENT AS OF 2025-05-01</para>
+ </formalpara>
- <para>
- This is just a placeholder for now.
- </para>
+ <sect2 id="release-18-highlights">
+ <title>Overview</title>
-</sect1>
+ <para>
+ <productname>PostgreSQL</productname> 18 contains many new features
+ and enhancements, including:
+ </para>
+
+ <itemizedlist>
+
+ <listitem>
+ <para>
+ (to be completed)
+ </para>
+ </listitem>
+ </itemizedlist>
+
+ <para>
+ The above items and other new features of
+ <productname>PostgreSQL</productname> 18 are explained in more detail
+ in the sections below.
+ </para>
+
+ </sect2>
+
+ <sect2 id="release-18-migration">
+
+ <title>Migration to Version 18</title>
+
+ <para>
+ A dump/restore using <xref linkend="app-pg-dumpall"/> or use of
+ <xref linkend="pgupgrade"/> or logical replication is required for
+ those wishing to migrate data from any previous release. See <xref
+ linkend="upgrading"/> for general information on migrating to new
+ major releases.
+ </para>
+
+ <para>
+ Version 18 contains a number of changes that may affect compatibility
+ with previous releases. Observe the following incompatibilities:
+ </para>
+
+ <itemizedlist>
+
+<!--
+2025-01-16 [d7674c9fa] Seek zone abbreviations in the IANA data before timezone
+-->
+
+<listitem>
+<para>
+Change time zone abbreviation handling (Tom Lane)
+<ulink url="&commit_baseurl;d7674c9fa">§</ulink>
+</para>
+
+<para>
+The system will now favor time zone abbreviation for the current session time zone before checking the server variable timezone_abbreviations. Previously timezone_abbreviations were
+consulted first for matches.
+</para>
+</listitem>
+
+<!--
+2024-12-02 [db6a4a985] Deprecate MD5 passwords.
+-->
+
+<listitem>
+<para>
+Deprecate MD5 password authentication (Nathan Bossart)
+<ulink url="&commit_baseurl;db6a4a985">§</ulink>
+</para>
+
+<para>
+Warnings generated by their use can be disabled by the server variable md5_password_warnings.
+</para>
+</listitem>
+
+<!--
+2024-09-24 [62ddf7ee9] Add ONLY support for VACUUM and ANALYZE
+-->
+
+<listitem>
+<para>
+Change VACUUM and ANALYZE to process the inheritance children of a parent (Michael Harris)
+<ulink url="&commit_baseurl;62ddf7ee9">§</ulink>
+</para>
+
+<para>
+The previous behavior can be performed by using the new ONLY option.
+</para>
+</listitem>
+
+<!--
+2024-09-30 [770233748] Do not treat \. as an EOF marker in CSV mode for COPY IN
+2024-10-01 [da8a4c166] Reject a copy EOF marker that has data ahead of it on th
+-->
+
+<listitem>
+<para>
+Prevent COPY IN from treating \. as an end-of-file marker when reading CSV files (Daniel Vérité, Tom Lane)
+<ulink url="&commit_baseurl;770233748">§</ulink>
+<ulink url="&commit_baseurl;da8a4c166">§</ulink>
+</para>
+
+<para>
+psql will still treat \. as an end-of-file marker when reading CSV files from STDIN. Older psql clients connecting to Postgres 18 servers might experience \copy problems. This
+release also enforces that \. must appear alone on a line.
+</para>
+</listitem>
+
+<!--
+2024-10-03 [e2bab2d79] Remove support for unlogged on partitioned tables
+-->
+
+<listitem>
+<para>
+Disallow unlogged partitioned tables (Michael Paquier)
+<ulink url="&commit_baseurl;e2bab2d79">§</ulink>
+</para>
+
+<para>
+Previously ALTER TABLE SET [UN]LOGGED did nothing, and the creation of an unlogged partitioned table did not cause its children to be unlogged.
+</para>
+</listitem>
+
+<!--
+2024-09-12 [fefa76f70] Remove old RULE privilege completely.
+-->
+
+<listitem>
+<para>
+Remove non-functioning support for RULE privileges in GRANT/REVOKE (Fujii Masao)
+<ulink url="&commit_baseurl;fefa76f70">§</ulink>
+</para>
+
+<para>
+These have been non-functioning since Postgres 8.2.
+</para>
+</listitem>
+
+<!--
+2024-10-24 [3d1ef3a15] Support configuring multiple ECDH curves
+-->
+
+<listitem>
+<para>
+Rename server variable ssl_ecdh_curve to ssl_groups and allow multiple colon-separated ECDH curves to be specified (Erica Zhang, Daniel Gustafsson)
+<ulink url="&commit_baseurl;3d1ef3a15">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-08-12 [f0d112759] Remove "parent" column from pg_backend_memory_contexts
+-->
+
+<listitem>
+<para>
+Remove column pg_backend_memory_contexts.parent (Melih Mutlu)
+<ulink url="&commit_baseurl;f0d112759">§</ulink>
+</para>
+
+<para>
+This is now longer needed since pg_backend_memory_contexts.path was added.
+</para>
+</listitem>
+
+<!--
+2024-07-25 [32d3ed816] Add path column to pg_backend_memory_contexts view
+-->
+
+<listitem>
+<para>
+Change pg_backend_memory_contexts.level to be one-based (Melih Mutlu)
+<ulink url="&commit_baseurl;32d3ed816">§</ulink>
+</para>
+
+<para>
+It was previously zero-based.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect2>
+
+ <sect2 id="release-18-changes">
+ <title>Changes</title>
+
+ <para>
+ Below you will find a detailed account of the changes between
+ <productname>PostgreSQL</productname> 18 and the previous major
+ release.
+ </para>
+
+ <sect3 id="release-18-server">
+ <title>Server</title>
+
+ <sect4 id="release-18-optimizer">
+ <title>Optimizer</title>
+
+ <itemizedlist>
+
+<!--
+2025-02-17 [fc069a3a6] Implement Self-Join Elimination
+-->
+
+<listitem>
+<para>
+Remove some unnecessary table self-joins (Andrey Lepikhov, Alexander Kuzmenkov, Alexander Korotkov, Alena Rybakina)
+<ulink url="&commit_baseurl;fc069a3a6">§</ulink>
+</para>
+
+<para>
+This optimization can be disabled with server variable enable_self_join_elimination.
+</para>
+</listitem>
+
+<!--
+2025-04-04 [c0962a113] Convert 'x IN (VALUES ...)' to 'x = ANY ...' then approp
+-->
+
+<listitem>
+<para>
+Convert some 'IN (VALUES ...)' to 'x = ANY ...' for better optimizer statistics (Alena Rybakina, Andrei Lepikhov)
+<ulink url="&commit_baseurl;c0962a113">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-11-24 [ae4569161] Teach bitmap path generation about transforming OR-claus
+-->
+
+<listitem>
+<para>
+Allow transforming OR-clauses to arrays for faster index processing (Alexander Korotkov, Andrey Lepikhov)
+<ulink url="&commit_baseurl;ae4569161">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-09-10 [52c707483] Use a hash table to de-duplicate column names in ruleuti
+2024-12-19 [276279295] Convert SetOp to read its inputs as outerPlan and innerP
+2024-12-19 [8d96f57d5] Improve planner's handling of SetOp plans.
+2024-09-05 [908a96861] Optimize WindowAgg's use of tuplestores
+-->
+
+<listitem>
+<para>
+Speed up the processing of INTERSECT, EXCEPT, window aggregates, and view column aliases (Tom Lane, David Rowley)
+<ulink url="&commit_baseurl;52c707483">§</ulink>
+<ulink url="&commit_baseurl;276279295">§</ulink>
+<ulink url="&commit_baseurl;8d96f57d5">§</ulink>
+<ulink url="&commit_baseurl;908a96861">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-11-26 [a8ccf4e93] Reordering DISTINCT keys to match input path's pathkeys
+-->
+
+<listitem>
+<para>
+Allow the keys of SELECT DISTINCT to be internally reordered to avoid sorting (Richard Guo)
+<ulink url="&commit_baseurl;a8ccf4e93">§</ulink>
+</para>
+
+<para>
+The optimizer feature can be disabled via enable_distinct_reordering.
+</para>
+</listitem>
+
+<!--
+2024-10-09 [67a54b9e8] Allow pushdown of HAVING clauses with grouping sets
+-->
+
+<listitem>
+<para>
+Allow some HAVING clauses on GROUPING SETS to be pushed to WHERE clauses (Richard Guo)
+<ulink url="&commit_baseurl;67a54b9e8">§</ulink>
+</para>
+
+<para>
+This allows earlier row filtering.
+</para>
+</listitem>
+
+<!--
+2024-07-09 [036bdcec9] Teach planner how to estimate rows for timestamp generat
+2024-12-02 [97173536e] Add a planner support function for numeric generate_seri
+-->
+
+<listitem>
+<para>
+Improve row estimates for generate_series() using numeric and timestamp values (David Rowley, Song Jinzhou)
+<ulink url="&commit_baseurl;036bdcec9">§</ulink>
+<ulink url="&commit_baseurl;97173536e">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-07-05 [aa86129e1] Support "Right Semi Join" plan shapes
+-->
+
+<listitem>
+<para>
+Allow the optimizer to use "Right Semi Join" plans (Richard Guo)
+<ulink url="&commit_baseurl;aa86129e1">§</ulink>
+</para>
+
+<para>
+Semi-joins are used when needing to find if there is at least one match.
+</para>
+</listitem>
+
+<!--
+2024-10-09 [828e94c9d] Consider explicit incremental sort for mergejoins
+-->
+
+<listitem>
+<para>
+Allow merge join to use incremental sorts (Richard Guo)
+<ulink url="&commit_baseurl;828e94c9d">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-08-20 [adf97c156] Speed up Hash Join by making ExprStates support hashing
+-->
+
+<listitem>
+<para>
+Improve the performance of hash joins (David Rowley)
+<ulink url="&commit_baseurl;adf97c156">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-01-30 [bb3ec16e1] Move PartitionPruneInfo out of plan nodes into PlannedSt
+2025-01-31 [d47cbf474] Perform runtime initial pruning outside ExecInitNode()
+2025-02-07 [cbc127917] Track unpruned relids to avoid processing pruned relatio
+2025-02-20 [525392d57] Don't lock partitions pruned by initial pruning
+2025-04-04 [88f55bc97] Make derived clause lookup in EquivalenceClass more effi
+2025-04-08 [d69d45a5a] Speedup child EquivalenceMember lookup in planner
+-->
+<listitem>
+<para>
+Allow partitions to be pruned earlier and quicker, and skipped in more places (Amit Langote, Ashutosh Bapat, Yuya Watari, David Rowley)
+<ulink url="&commit_baseurl;bb3ec16e1">§</ulink>
+<ulink url="&commit_baseurl;d47cbf474">§</ulink>
+<ulink url="&commit_baseurl;cbc127917">§</ulink>
+<ulink url="&commit_baseurl;525392d57">§</ulink>
+<ulink url="&commit_baseurl;88f55bc97">§</ulink>
+<ulink url="&commit_baseurl;d69d45a5a">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-07-30 [9b282a935] Fix partitionwise join with partially-redundant join cla
+2024-07-29 [513f4472a] Reduce memory used by partitionwise joins
+-->
+
+<listitem>
+<para>
+Allow partitionwise join in more cases, and reduce its memory usage (Richard Guo, Tom Lane, Ashutosh Bapat)
+<ulink url="&commit_baseurl;9b282a935">§</ulink>
+<ulink url="&commit_baseurl;513f4472a">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-10 [fae535da0] Teach Append to consider tuple_fraction when accumulatin
+-->
+
+<listitem>
+<para>
+Improve cost estimates of partition queries (Nikita Malakhov, Andrei Lepikhov)
+<ulink url="&commit_baseurl;fae535da0">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-04-02 [0dca5d68d] Change SQL-language functions to use the plan cache.
+2025-04-17 [09b07c295] Minor performance improvement for SQL-language functions
+-->
+
+<listitem>
+<para>
+Improve SQL-language function plan caching (Alexander Pyhalov, Tom Lane)
+<ulink url="&commit_baseurl;0dca5d68d">§</ulink>
+<ulink url="&commit_baseurl;09b07c295">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-08-21 [e22253467] Treat number of disabled nodes in a path as a separate c
+-->
+
+<listitem>
+<para>
+Improve handling of disabled optimizer features (Robert Haas)
+<ulink url="&commit_baseurl;e22253467">§</ulink>
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4 id="release-18-indexes">
+ <title>Indexes</title>
+
+ <itemizedlist>
+
+<!--
+2025-04-04 [92fe23d93] Add nbtree skip scan optimization.
+2025-04-04 [8a510275d] Further optimize nbtree search scan key comparisons.
+2025-04-04 [8a510275d] Further optimize nbtree search scan key comparisons.
+-->
+
+<listitem>
+<para>
+Allow skip scans of btree indexes (Peter Geoghegan)
+<ulink url="&commit_baseurl;92fe23d93">§</ulink>
+<ulink url="&commit_baseurl;8a510275d">§</ulink>
+<ulink url="&commit_baseurl;8a510275d">§</ulink>
+</para>
+
+<para>
+This is most useful if the earlier non-referenced columns contain few unique values.
+</para>
+</listitem>
+
+<!--
+2025-03-18 [f278e1fe3] Allow non-btree unique indexes for partition keys
+2025-03-18 [9d6db8bec] Allow non-btree unique indexes for matviews
+-->
+
+<listitem>
+<para>
+Allow non-btree unique indexes to be used as partition keys and in materialized views (Mark Dilger)
+<ulink url="&commit_baseurl;f278e1fe3">§</ulink>
+<ulink url="&commit_baseurl;9d6db8bec">§</ulink>
+</para>
+
+<para>
+The index type must still support equality.
+</para>
+</listitem>
+
+<!--
+2025-03-03 [8492feb98] Allow parallel CREATE INDEX for GIN indexes
+-->
+
+<listitem>
+<para>
+Allow GIN indexes to be created in parallel (Tomas Vondra, Matthias van de Meent)
+<ulink url="&commit_baseurl;8492feb98">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-04-02 [e9e7b6604] Add GiST and btree sortsupport routines for range types
+-->
+
+<listitem>
+<para>
+Allow values to be sorted to speed rangetype GiST and btree index builds (Bernd Helmle)
+<ulink url="&commit_baseurl;e9e7b6604">§</ulink>
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4 id="release-18-performance">
+ <title>General Performance</title>
+
+ <itemizedlist>
+
+<!--
+2025-03-17 [02844012b] aio: Basic subsystem initialization
+2025-03-17 [da7226993] aio: Add core asynchronous I/O infrastructure
+2025-03-18 [55b454d0e] aio: Infrastructure for io_method=worker
+2025-03-18 [247ce06b8] aio: Add io_method=worker
+2025-03-19 [10f664684] Introduce io_max_combine_limit.
+2025-03-19 [06fb5612c] Increase io_combine_limit range to 1MB.
+2025-03-26 [c325a7633] aio: Add io_method=io_uring
+2025-03-29 [50cb7505b] aio: Implement support for reads in smgr/md/fd
+2025-03-30 [047cba7fa] bufmgr: Implement AIO read support
+2025-03-30 [12ce89fd0] bufmgr: Use AIO in StartReadBuffers()
+2025-03-30 [2a5e709e7] Enable IO concurrency on all systems
+-->
+
+<listitem>
+<para>
+Add an asynchronous I/O subsystem (Andres Freund, Thomas Munro, Nazir Bilal Yavuz, Melanie Plageman)
+<ulink url="&commit_baseurl;02844012b">§</ulink>
+<ulink url="&commit_baseurl;da7226993">§</ulink>
+<ulink url="&commit_baseurl;55b454d0e">§</ulink>
+<ulink url="&commit_baseurl;247ce06b8">§</ulink>
+<ulink url="&commit_baseurl;10f664684">§</ulink>
+<ulink url="&commit_baseurl;06fb5612c">§</ulink>
+<ulink url="&commit_baseurl;c325a7633">§</ulink>
+<ulink url="&commit_baseurl;50cb7505b">§</ulink>
+<ulink url="&commit_baseurl;047cba7fa">§</ulink>
+<ulink url="&commit_baseurl;12ce89fd0">§</ulink>
+<ulink url="&commit_baseurl;2a5e709e7">§</ulink>
+</para>
+
+<para>
+This is enabled by default and controlled by server variable io_method with server variables io_combine_limit and io_max_combine_limit added to control it. This also enables
+effective_io_concurrency and maintenance_io_concurrency values greater than zero for systems without fadvise() support. The new system view pg_aios shows the file handles being used
+for asynchronous I/O.
+</para>
+</listitem>
+
+<!--
+2024-09-21 [c4d5cb71d] Increase the number of fast-path lock slots
+-->
+
+<listitem>
+<para>
+Improve the locking performance of queries that access many relations (Tomas Vondra)
+<ulink url="&commit_baseurl;c4d5cb71d">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-02-11 [052026c9b] Eagerly scan all-visible pages to amortize aggressive va
+2025-03-03 [06eae9e62] Trigger more frequent autovacuums with relallfrozen
+-->
+
+<listitem>
+<para>
+Allow normal vacuums to freeze some pages, even though they are all-visible (Melanie Plageman)
+<ulink url="&commit_baseurl;052026c9b">§</ulink>
+<ulink url="&commit_baseurl;06eae9e62">§</ulink>
+</para>
+
+<para>
+This reduces the overhead of later full-relation freezing. The aggressiveness of this can be controlled by server variable vacuum_max_eager_freeze_failure_rate, and per-table setting
+vacuum_max_eager_freeze_failure_rate. Previously vacuum never processed all-visible pages until freezing was required.
+</para>
+</listitem>
+
+<!--
+2025-03-20 [0164a0f9e] Add vacuum_truncate configuration parameter.
+-->
+
+<listitem>
+<para>
+Add server variable vacuum_truncate to control file truncation during VACUUM (Nathan Bossart, Gurjeet Singh)
+<ulink url="&commit_baseurl;0164a0f9e">§</ulink>
+</para>
+
+<para>
+A storage-level parameter with this name and behavior already existed.
+</para>
+</listitem>
+
+<!--
+2025-03-12 [ff79b5b2a] Increase default effective_io_concurrency to 16
+2025-03-18 [cc6be07eb] Increase default maintenance_io_concurrency to 16
+-->
+
+<listitem>
+<para>
+Increase server variables effective_io_concurrency's and maintenance_io_concurrency's default values to 16 (Melanie Plageman)
+<ulink url="&commit_baseurl;ff79b5b2a">§</ulink>
+<ulink url="&commit_baseurl;cc6be07eb">§</ulink>
+</para>
+
+<para>
+This more accurately reflects modern hardware.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4 id="release-18-monitoring">
+ <title>Monitoring</title>
+
+ <itemizedlist>
+
+<!--
+2025-03-12 [9219093ca] Modularize log_connections output
+2025-03-12 [18cd15e70] Add connection establishment duration logging
+-->
+
+<listitem>
+<para>
+Change server variable log_connections to log connections more granularly (Melanie Plageman)
+<ulink url="&commit_baseurl;9219093ca">§</ulink>
+<ulink url="&commit_baseurl;18cd15e70">§</ulink>
+</para>
+
+<para>
+This server variable was previously only boolean; these options are still supported.
+</para>
+</listitem>
+
+<!--
+2025-04-07 [3516ea768] Add local-address escape "%L" to log_line_prefix.
+-->
+
+<listitem>
+<para>
+Add log_line_prefix escape "%L" to output the client IP address (Greg Sabino Mullane)
+<ulink url="&commit_baseurl;3516ea768">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-14 [6d376c3b0] Add GUC option to log lock acquisition failures.
+-->
+
+<listitem>
+<para>
+Add server variable log_lock_failure to log lock acquisition failures (Yuki Seino)
+<ulink url="&commit_baseurl;6d376c3b0">§</ulink>
+</para>
+
+<para>
+Specifically it reports SELECT ... NOWAIT lock failures.
+</para>
+</listitem>
+
+<!--
+2025-01-28 [30a6ed0ce] Track per-relation cumulative time spent in [auto]vacuum
+-->
+
+<listitem>
+<para>
+Modify pg_stat_all_tables and its variants to report the time spent in vacuum, analyze, and their automatic variants (Sami Imseih)
+<ulink url="&commit_baseurl;30a6ed0ce">§</ulink>
+</para>
+
+<para>
+The new fields are total_vacuum_time, total_autovacuum_time, total_analyze_time, and total_autoanalyze_time.
+</para>
+</listitem>
+
+<!--
+2025-02-11 [bb8dff999] Add cost-based vacuum delay time to progress views.
+2025-02-14 [7720082ae] Add delay time to VACUUM/ANALYZE (VERBOSE) and autovacuu
+-->
+
+<listitem>
+<para>
+Add VACUUM and ANALYZE delay time reporting (Bertrand Drouvot, Nathan Bossart)
+<ulink url="&commit_baseurl;bb8dff999">§</ulink>
+<ulink url="&commit_baseurl;7720082ae">§</ulink>
+</para>
+
+<para>
+This information appears in the autovacuum logs, the system views pg_stat_progress_vacuum and pg_stat_progress_analyze, and the output of VACUUM and ANALYZE when in VERBOSE mode. This
+tracking must be enabled with the server variable track_cost_delay_timing.
+</para>
+</listitem>
+
+<!--
+2024-09-30 [559efce1d] Add num_done counter to the pg_stat_checkpointer view.
+-->
+
+<listitem>
+<para>
+Add column pg_stat_checkpointer.num_done to report the number of completed checkpoints (Anton A. Melnikov)
+<ulink url="&commit_baseurl;559efce1d">§</ulink>
+</para>
+
+<para>
+Columns num_timed and num_requested count both completed and skipped checkpoints.
+</para>
+</listitem>
+
+<!--
+2024-10-02 [17cc5f666] Fix inconsistent reporting of checkpointer stats.
+-->
+
+<listitem>
+<para>
+Add column pg_stat_checkpointer.slru_written to report SLRU buffers written (Nitin Jadhav)
+<ulink url="&commit_baseurl;17cc5f666">§</ulink>
+</para>
+
+<para>
+Also, modify the checkpoint server log message to use separate shared buffer and SLRU buffer values.
+</para>
+</listitem>
+
+<!--
+2024-11-11 [e7a9496de] Add two attributes to pg_stat_database for parallel work
+-->
+
+<listitem>
+<para>
+Add columns to pg_stat_database to report parallel workers activity (Benoit Lobréau)
+<ulink url="&commit_baseurl;e7a9496de">§</ulink>
+</para>
+
+<para>
+The new columns are parallel_workers_to_launch and parallel_workers_launched.
+</para>
+</listitem>
+
+<!--
+2024-12-19 [9aea73fc6] Add backend-level statistics to pgstats
+2025-03-03 [3f1db99bf] Handle auxiliary processes in SQL functions of backend s
+-->
+
+<listitem>
+<para>
+Add per-backend I/O statistics reporting (Bertrand Drouvot)
+<ulink url="&commit_baseurl;9aea73fc6">§</ulink>
+<ulink url="&commit_baseurl;3f1db99bf">§</ulink>
+</para>
+
+<para>
+The statistics are accessed via pg_stat_get_backend_io(). Per-backend statistics can be cleared via pg_stat_reset_backend_stats().
+</para>
+</listitem>
+
+<!--
+2025-01-14 [f92c854cf] Make pg_stat_io count IOs as bytes instead of blocks for
+-->
+
+<listitem>
+<para>
+Add pg_stat_io columns to report I/O activity in bytes (Nazir Bilal Yavuz)
+<ulink url="&commit_baseurl;f92c854cf">§</ulink>
+</para>
+
+<para>
+The new columns are read_bytes, write_bytes, and extend_bytes. The op_bytes column, which always equaled BLCKSZ, has been removed.
+</para>
+</listitem>
+
+<!--
+2025-02-04 [a051e71e2] Add data for WAL in pg_stat_io and backend statistics
+2025-02-20 [4538bd3f1] doc: Add details about object "wal" in pg_stat_io
+2025-03-06 [7f7f324eb] Add more monitoring data for WAL writes in the WAL recei
+-->
+
+<listitem>
+<para>
+Add wal I/O activity rows to pg_stat_io (Nazir Bilal Yavuz, Bertrand Drouvot, Michael Paquier)
+<ulink url="&commit_baseurl;a051e71e2">§</ulink>
+<ulink url="&commit_baseurl;4538bd3f1">§</ulink>
+<ulink url="&commit_baseurl;7f7f324eb">§</ulink>
+</para>
+
+<para>
+This includes WAL receiver activity and a wait event for such writes.
+</para>
+
+</listitem>
+
+<!--
+2025-02-26 [6c349d83b] Re-add GUC track_wal_io_timing
+-->
+
+<listitem>
+<para>
+Change server variable track_wal_io_timing to control tracking WAL timing in pg_stat_io instead of pg_stat_wal (Bertrand Drouvot)
+<ulink url="&commit_baseurl;6c349d83b">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-11 [76def4cdd] Add WAL data to backend statistics
+-->
+
+<listitem>
+<para>
+Add function pg_stat_get_backend_wal() to return per-backend WAL statistics (Bertrand Drouvot)
+<ulink url="&commit_baseurl;76def4cdd">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-10-11 [4e1fad378] Add pg_ls_summariesdir().
+-->
+
+<listitem>
+<para>
+Add function pg_ls_summariesdir() to specifically list the contents of PGDATA/pg_wal/summaries (Yushi Ogiwara)
+<ulink url="&commit_baseurl;4e1fad378">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-02-24 [2421e9a51] Remove read/sync fields from pg_stat_wal and GUC track_w
+2025-02-26 [6c349d83b] Re-add GUC track_wal_io_timing
+-->
+
+<listitem>
+<para>
+Remove read/sync fields from pg_stat_wal (Bertrand Drouvot)
+<ulink url="&commit_baseurl;2421e9a51">§</ulink>
+<ulink url="&commit_baseurl;6c349d83b">§</ulink>
+</para>
+
+<para>
+This removes columns wal_write, wal_sync, wal_write_time, and wal_sync_time.
+</para>
+</listitem>
+
+<!--
+2025-03-18 [62d712ecf] Introduce squashing of constant lists in query jumbling
+2025-03-27 [9fbd53dea] Remove the query_id_squash_values GUC
+-->
+
+<listitem>
+<para>
+Have query jumbling of arrays consider only the first and last array elements (Dmitry Dolgov, Sami Imseih)
+<ulink url="&commit_baseurl;62d712ecf">§</ulink>
+<ulink url="&commit_baseurl;9fbd53dea">§</ulink>
+</para>
+
+<para>
+Jumbling is used by pg_stat_statements.
+</para>
+</listitem>
+
+<!--
+2025-03-26 [787514b30] Use relation name instead of OID in query jumbling for R
+-->
+
+<listitem>
+<para>
+Adjust query jumbling to group together queries using the same relation name (Michael Paquier, Sami Imseih)
+<ulink url="&commit_baseurl;787514b30">§</ulink>
+</para>
+
+<para>
+This is true even if the tables in different schemas have different column names.
+</para>
+</listitem>
+
+<!--
+2025-04-08 [042a66291] Add function to get memory context stats for processes
+2025-04-08 [c57971034] Rename argument in pg_get_process_memory_contexts().
+-->
+
+<listitem>
+<para>
+Add function pg_get_process_memory_contexts() to report process memory context statistics (Rahila Syed)
+<ulink url="&commit_baseurl;042a66291">§</ulink>
+<ulink url="&commit_baseurl;c57971034">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-07-01 [12227a1d5] Add context type field to pg_backend_memory_contexts
+-->
+
+<listitem>
+<para>
+Add column pg_backend_memory_contexts.type to report the type of memory context (David Rowley)
+<ulink url="&commit_baseurl;12227a1d5">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-07-25 [32d3ed816] Add path column to pg_backend_memory_contexts view
+-->
+
+<listitem>
+<para>
+Add column pg_backend_memory_contexts.path to show memory context parents (Melih Mutlu)
+<ulink url="&commit_baseurl;32d3ed816">§</ulink>
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4 id="release-18-privileges">
+ <title>Privileges</title>
+
+ <itemizedlist>
+
+<!--
+2024-07-04 [4564f1ceb] Add pg_get_acl() to get the ACL for a database object
+2024-07-10 [d898665bf] Extend pg_get_acl() to handle sub-object IDs
+-->
+
+<listitem>
+<para>
+Add function pg_get_acl() to retrieve database access control details (Joel Jacobson)
+<ulink url="&commit_baseurl;4564f1ceb">§</ulink>
+<ulink url="&commit_baseurl;d898665bf">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-09-12 [4eada203a] Add has_largeobject_privilege function.
+-->
+
+<listitem>
+<para>
+Add function has_largeobject_privilege() to check large object privileges (Yugo Nagata)
+<ulink url="&commit_baseurl;4eada203a">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-04-04 [0d6c47766] Extend ALTER DEFAULT PRIVILEGES to define default privil
+-->
+
+<listitem>
+<para>
+Allow ALTER DEFAULT PRIVILEGES to define large object default privileges (Takatsuka Haruka, Yugo Nagata, Laurenz Albe)
+<ulink url="&commit_baseurl;0d6c47766">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-07-09 [ccd38024b] Introduce pg_signal_autovacuum_worker.
+-->
+
+<listitem>
+<para>
+Add predefined role pg_signal_autovacuum_worker (Kirill Reshke)
+<ulink url="&commit_baseurl;ccd38024b">§</ulink>
+</para>
+
+<para>
+This allows sending signals to autovacuum workers.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4 id="release-18-server-config">
+ <title>Server Configuration</title>
+
+ <itemizedlist>
+
+<!--
+2025-02-20 [b3f0be788] Add support for OAUTHBEARER SASL mechanism
+-->
+
+<listitem>
+<para>
+Add support for the "oauth" authentication (Jacob Champion, Daniel Gustafsson, Thomas Munro)
+<ulink url="&commit_baseurl;b3f0be788">§</ulink>
+</para>
+
+<para>
+This adds an "oauth" authentication method to pg_hba.conf, a server variable oauth_validator_libraries to specify OAUTH libraries, a configure flag --with-libcurl to add the required
+compile-time libraries, and libpq OAUTH options.
+</para>
+</listitem>
+
+<!--
+2024-10-24 [45188c2ea] Support configuring TLSv1.3 cipher suites
+-->
+
+<listitem>
+<para>
+Add server variable ssl_tls13_ciphers to allow specification of multiple colon-separated TLSv1.3 cipher suites (Erica Zhang, Daniel Gustafsson)
+<ulink url="&commit_baseurl;45188c2ea">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-18 [daa02c6bd] Add X25519 to the default set of curves
+-->
+
+<listitem>
+<para>
+Change server variable ssl_groups's default to include elliptic curve X25519 (Daniel Gustafsson, Jacob Champion)
+<ulink url="&commit_baseurl;daa02c6bd">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-01-24 [924d89a35] pgcrypto: Add function to check FIPS mode
+-->
+
+<listitem>
+<para>
+Add function pg_check_fipsmode() to report the server's FIPS mode (Daniel Gustafsson)
+<ulink url="&commit_baseurl;924d89a35">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-04-02 [a460251f0] Make cancel request keys longer
+-->
+
+<listitem>
+<para>
+Make cancel request keys 256 bits (Heikki Linnakangas)
+<ulink url="&commit_baseurl;a460251f0">§</ulink>
+</para>
+
+<para>
+This is enabled when the libpq client and server are Postgres 18 or later.
+</para>
+</listitem>
+
+<!--
+2025-01-06 [c758119e5] Allow changing autovacuum_max_workers without restarting
+-->
+
+<listitem>
+<para>
+Add server variable autovacuum_worker_slots to specify the maximum number of background workers (Nathan Bossart)
+<ulink url="&commit_baseurl;c758119e5">§</ulink>
+</para>
+
+<para>
+With this variable set, autovacuum_max_workers can be adjusted at runtime up to this maximum without a server restart.
+</para>
+</listitem>
+
+<!--
+2025-02-05 [306dc520b] Introduce autovacuum_vacuum_max_threshold.
+-->
+
+<listitem>
+<para>
+Allow specification of the fixed number of dead tuples that will trigger an autovacuum (Nathan Bossart, Frédéric Yhuel)
+<ulink url="&commit_baseurl;306dc520b">§</ulink>
+</para>
+
+<para>
+The server variable is autovacuum_vacuum_max_threshold. Percentages are still used for triggering.
+</para>
+</listitem>
+
+<!--
+2025-03-24 [adb5f85fa] Redefine max_files_per_process to control additionally o
+-->
+
+<listitem>
+<para>
+Change server variable max_files_per_process to limit only files opened by a backend (Andres Freund)
+<ulink url="&commit_baseurl;adb5f85fa">§</ulink>
+</para>
+
+<para>
+Previously files opened by the postmaster were also counted toward this limit.
+</para>
+</listitem>
+
+<!--
+2024-07-26 [0dcaea569] Introduce num_os_semaphores GUC.
+-->
+
+<listitem>
+<para>
+Add server variable num_os_semaphores to report the required number of needed semaphores (Nathan Bossart)
+<ulink url="&commit_baseurl;0dcaea569">§</ulink>
+</para>
+
+<para>
+This is useful for operating system configuration.
+</para>
+</listitem>
+
+<!--
+2025-03-19 [4f7f7b037] extension_control_path
+-->
+
+<listitem>
+<para>
+Add server variable extension_control_path to specify the location of extension control files (Peter Eisentraut, Matheus Alcantara)
+<ulink url="&commit_baseurl;4f7f7b037">§</ulink>
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4 id="release-18-replication">
+ <title> Replication and Recovery</title>
+
+ <itemizedlist>
+
+<!--
+2025-02-19 [ac0e33136] Invalidate inactive replication slots.
+-->
+
+<listitem>
+<para>
+Allow inactive replication slots to be automatically invalided using server variable idle_replication_slot_timeout (Nisha Moond, Bharath Rupireddy)
+<ulink url="&commit_baseurl;ac0e33136">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-21 [04ff636cb] Add GUC option to control maximum active replication ori
+-->
+
+<listitem>
+<para>
+Add server variable max_active_replication_origins to control the maximum active replication origins (Euler Taveira)
+<ulink url="&commit_baseurl;04ff636cb">§</ulink>
+</para>
+
+<para>
+This was previously controlled by max_replication_slots, but this new setting allows a higher origin count in cases where fewer slots are required.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4 id="release-18-logical">
+ <title><link linkend="logical-replication">Logical Replication</link></title>
+
+ <itemizedlist>
+
+<!--
+2024-10-30 [745217a05] Replicate generated columns when specified in the column
+2024-11-07 [7054186c4] Replicate generated columns when 'publish_generated_colu
+2024-12-04 [87ce27de6] Ensure stored generated columns must be published when r
+2025-01-30 [6252b1eaf] Doc: Generated column replication.
+-->
+
+<listitem>
+<para>
+Allow the values of generated columns to be logically replicated (Shubham Khanna, Vignesh C, Zhijie Hou, Shlok Kyal, Peter Smith)
+<ulink url="&commit_baseurl;745217a05">§</ulink>
+<ulink url="&commit_baseurl;7054186c4">§</ulink>
+<ulink url="&commit_baseurl;87ce27de6">§</ulink>
+<ulink url="&commit_baseurl;6252b1eaf">§</ulink>
+</para>
+
+<para>
+If the publication specifies a column list, all columns, generated and non-generated, are published. Without a published column list, publication option publish_generated_columns
+controls whether generated columns are published. Previously generated columns were not replicated and the subscriber had to compute the values if possible; this is particularly
+useful for non-Postgres subscribers which lack such a capability.
+</para>
+</listitem>
+
+<!--
+2024-10-28 [1bf1140be] Change the default value of the option to 'par
+-->
+
+<listitem>
+<para>
+Change the default CREATE SUBSCRIPTION option from "off" to "parallel" (Hayato Kuroda, Masahiko Sawada, Peter Smith, Amit Kapila)
+<ulink url="&commit_baseurl;1bf1140be">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-07-24 [1462aad2e] Allow altering of two_phase option of a SUBSCRIPTION.
+2025-04-03 [4868c96bc] Fix slot synchronization for two_phase enabled slots.
+-->
+
+<listitem>
+<para>
+Allow ALTER SUBSCRIPTION to change the replication slot's two-phase commit behavior (Hayato Kuroda, Ajin Cherian, Amit Kapila, Zhijie Hou)
+<ulink url="&commit_baseurl;1462aad2e">§</ulink>
+<ulink url="&commit_baseurl;4868c96bc">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-08-20 [9758174e2] Log the conflicts while applying changes in logical repl
+2024-08-22 [edcb71258] Doc: explain the log format of logical replication confl
+2024-08-29 [640178c92] Rename the conflict types for the origin differ cases.
+2024-09-04 [6c2b5edec] Collect statistics about conflicts in logical replicatio
+2025-03-24 [73eba5004] Detect and Log multiple_unique_conflicts type conflict.
+-->
+
+<listitem>
+<para>
+Log conflicts while applying logical replication changes (Zhijie Hou, Nisha Moond)
+<ulink url="&commit_baseurl;9758174e2">§</ulink>
+<ulink url="&commit_baseurl;edcb71258">§</ulink>
+<ulink url="&commit_baseurl;640178c92">§</ulink>
+<ulink url="&commit_baseurl;6c2b5edec">§</ulink>
+<ulink url="&commit_baseurl;73eba5004">§</ulink>
+</para>
+
+<para>
+Also report in new columns of pg_stat_subscription_stats.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ </sect3>
+
+ <sect3 id="release-18-utility">
+ <title>Utility Commands</title>
+
+ <itemizedlist>
+
+<!--
+2025-02-07 [83ea6c540] Virtual generated columns
+2025-03-28 [cdc168ad4] Add support for not-null constraints on virtual generate
+2025-02-25 [1e4351af3] Expand virtual generated columns in the planner
+-->
+
+<listitem>
+<para>
+Allow generated columns to be virtual, and make them the default (Peter Eisentraut, Jian He, Richard Guo, Dean Rasheed)
+<ulink url="&commit_baseurl;83ea6c540">§</ulink>
+<ulink url="&commit_baseurl;cdc168ad4">§</ulink>
+<ulink url="&commit_baseurl;1e4351af3">§</ulink>
+</para>
+
+<para>
+Virtual generated columns generate their values when the columns are read, not written. The write behavior can still be specified via the STORED option.
+</para>
+</listitem>
+
+<!--
+2025-01-16 [80feb727c] Add OLD/NEW support to RETURNING in DML queries.
+-->
+
+<listitem>
+<para>
+Add OLD/NEW support to RETURNING in DML queries (Dean Rasheed)
+<ulink url="&commit_baseurl;80feb727c">§</ulink>
+</para>
+
+<para>
+Previously RETURNING only returned new values for INSERT and UPDATE, old values for DELETE; MERGE would return the appropriate value for the internal query executed. This new syntax
+allows INSERT with an ON CONFLICT action to return old values, UPDATE to return old values, and DELETE to return new values if the query assigned to an ON DELETE row would return new
+values. New syntax allows changeable relation aliases "old" and "new" to specify which values should be returned.
+</para>
+</listitem>
+
+<!--
+2025-02-19 [302cf1575] Add support for LIKE in CREATE FOREIGN TABLE
+-->
+
+<listitem>
+<para>
+Allow foreign tables to be created like existing local tables (Zhang Mingli)
+<ulink url="&commit_baseurl;302cf1575">§</ulink>
+</para>
+
+<para>
+The syntax is CREATE FOREIGN TABLE ... LIKE.
+</para>
+</listitem>
+
+<!--
+2024-11-27 [85b7efa1c] Support LIKE with nondeterministic collations
+-->
+
+<listitem>
+<para>
+Allow LIKE with nondeterministic collations (Peter Eisentraut)
+<ulink url="&commit_baseurl;85b7efa1c">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-02-21 [329304c90] Support text position search functions with nondetermini
+-->
+
+<listitem>
+<para>
+Allow text position search functions with nondeterministic collations (Peter Eisentraut)
+<ulink url="&commit_baseurl;329304c90">§</ulink>
+</para>
+
+<para>
+These used to generate an error.
+</para>
+</listitem>
+
+<!--
+2025-01-17 [d3d098316] Support PG_UNICODE_FAST locale in the builtin collation
+-->
+
+<listitem>
+<para>
+Add builtin collation provider PG_UNICODE_FAST (Jeff Davis)
+<ulink url="&commit_baseurl;d3d098316">§</ulink>
+</para>
+
+<para>
+This locale supports case mapping, but sorts in code point order, not natural language order.
+</para>
+</listitem>
+
+<!--
+2024-09-24 [62ddf7ee9] Add ONLY support for VACUUM and ANALYZE
+-->
+
+<listitem>
+<para>
+Allow VACUUM and ANALYZE to process partitioned tables without processing their children (Michael Harris)
+<ulink url="&commit_baseurl;62ddf7ee9">§</ulink>
+</para>
+
+<para>
+This is enabled with the new ONLY option. This is useful since autovacuum does not process partitioned tables, just its children.
+</para>
+</listitem>
+
+<!--
+2024-10-11 [e839c8ecc] Create functions pg_set_relation_stats, pg_clear_relatio
+2024-10-24 [d32d14639] Add functions pg_restore_relation_stats(), pg_restore_at
+2025-03-25 [650ab8aaf] Stats: use schemaname/relname instead of regclass.
+-->
+
+<listitem>
+<para>
+Add functions to modify per-relation and per-column optimizer statistics (Corey Huinker)
+<ulink url="&commit_baseurl;e839c8ecc">§</ulink>
+<ulink url="&commit_baseurl;d32d14639">§</ulink>
+<ulink url="&commit_baseurl;650ab8aaf">§</ulink>
+</para>
+
+<para>
+The functions are pg_restore_relation_stats(), pg_restore_attribute_stats(), pg_clear_relation_stats(), and pg_clear_attribute_stats.
+</para>
+</listitem>
+
+
+<!--
+2025-04-08 [f78ca6f3e] Introduce file_copy_method setting.
+-->
+
+<listitem>
+<para>
+Add server variable file_copy_method to control the file copying method (Nazir Bilal Yavuz)
+<ulink url="&commit_baseurl;f78ca6f3e">§</ulink>
+</para>
+
+<para>
+This controls whether CREATE DATABASE ... STRATEGY=FILE_COPY and ALTER DATABASE ... SET TABLESPACE uses file copy or clone.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ <sect4 id="release-18-constraints">
+ <title><link linkend="ddl-constraints">Constraints</link></title>
+
+ <itemizedlist>
+
+ <!--
+2024-09-17 [fc0438b4e] Add temporal PRIMARY KEY and UNIQUE constraints
+-->
+
+<listitem>
+<para>
+Allow the specification of non-overlapping PRIMARY KEY and UNIQUE constraints (Paul A. Jungwirth)
+</para>
+
+<para>
+This is specified by WITHOUT OVERLAPS on the last column.
+</para>
+</listitem>
+
+
+<!--
+2024-11-15 [9321d2fdf] Fix collation handling for foreign keys
+-->
+
+<listitem>
+<para>
+Require primary/foreign key relationships to use either deterministic collations or the the same nondeterministic collations (Peter Eisentraut)
+<ulink url="&commit_baseurl;9321d2fdf">§</ulink>
+</para>
+
+<para>
+The restore of a pg_dump, also used by pg_upgrade, will fail if these requirements are not met; schema changes must be made for these upgrade methods to succeed.
+</para>
+</listitem>
+
+<!--
+2025-01-11 [ca87c415e] Add support for NOT ENFORCED in CHECK constraints
+2025-04-02 [eec0040c4] Add support for NOT ENFORCED in foreign key constraints
+-->
+
+<listitem>
+<para>
+Allow CHECK and foreign key constraints to be specified as NOT ENFORCED (Amul Sul)
+<ulink url="&commit_baseurl;ca87c415e">§</ulink>
+<ulink url="&commit_baseurl;eec0040c4">§</ulink>
+</para>
+
+<para>
+This also adds column pg_constraint.conenforced.
+</para>
+</listitem>
+
+<!--
+2025-04-07 [a379061a2] Allow NOT NULL constraints to be added as NOT VALID
+-->
+
+<listitem>
+<para>
+Allow ALTER TABLE to set the NOT VALID attribute of NOT NULL constraints (Rushabh Lathia, Jian He)
+<ulink url="&commit_baseurl;a379061a2">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-01-23 [b663b9436] Allow NOT VALID foreign key constraints on partitioned t
+-->
+
+<listitem>
+<para>
+Allow NOT VALID foreign key constraints on partitioned tables (Amul Sul)
+<ulink url="&commit_baseurl;b663b9436">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-09-30 [4dea33ce7] Don't disallow DROP of constraints ONLY on partitioned t
+-->
+
+<listitem>
+<para>
+Allow dropping of constraints ONLY on partitioned tables (Álvaro Herrera)
+<ulink url="&commit_baseurl;4dea33ce7">§</ulink>
+</para>
+
+<para>
+This was previously erroneously prohibited.
+</para>
+</listitem>
+
+<!--
+2025-03-05 [f4e53e10b] Add ALTER TABLE ... ALTER CONSTRAINT ... SET [NO] INHERI
+2025-03-27 [4a02af8b1] Simplify syntax for ALTER TABLE ALTER CONSTRAINT NO INHE
+-->
+
+<listitem>
+<para>
+Allow modification of the inheritability of constraints (Suraj Kharage, Álvaro Herrera)
+<ulink url="&commit_baseurl;f4e53e10b">§</ulink>
+<ulink url="&commit_baseurl;4a02af8b1">§</ulink>
+</para>
+
+<para>
+The syntax is ALTER TABLE ... ALTER CONSTRAINT ... [NO] INHERIT.
+</para>
+</listitem>
+
+<!--
+2024-11-08 [14e87ffa5] Add pg_constraint rows for not-null constraints
+-->
+
+<listitem>
+<para>
+Store column NOT NULL specifications in pg_constraint (Álvaro Herrera, Bernd Helmle)
+<ulink url="&commit_baseurl;14e87ffa5">§</ulink>
+</para>
+
+<para>
+This allows names to be specified for NOT NULL constraint. This also adds NOT NULL constraints to foreign tables and NOT NULL inheritance control to local tables.
+</para>
+</listitem>
+
+ </itemizedlist>
+ </sect4>
+
+ <sect4 id="release-18-copy">
+ <title><link linkend="sql-copy"><command>COPY</command></link></title>
+
+ <itemizedlist>
+
+<!--
+2024-10-08 [4ac2a9bec] Add REJECT_LIMIT option to the COPY command.
+-->
+
+<listitem>
+<para>
+Add REJECT_LIMIT to control the number of invalid rows COPY IN can ignore (Atsushi Torikoshi)
+<ulink url="&commit_baseurl;4ac2a9bec">§</ulink>
+</para>
+
+<para>
+This is active when ON_ERROR = 'ignore'.
+</para>
+</listitem>
+
+<!--
+2025-04-04 [534874fac] Allow "COPY table TO" command to copy rows from material
+-->
+
+<listitem>
+<para>
+Allow COPY TO to copy rows from populated materialized view (Jian He)
+<ulink url="&commit_baseurl;534874fac">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-10-03 [e7834a1a2] Add log_verbosity = 'silent' support to COPY command.
+-->
+
+<listitem>
+<para>
+Add COPY log_verbosity level "silent" to suppress all log output (Atsushi Torikoshi)
+<ulink url="&commit_baseurl;e7834a1a2">§</ulink>
+</para>
+
+<para>
+This new level suppresses output for discarded input rows when on_error = 'ignore'.
+</para>
+</listitem>
+
+<!--
+2025-02-06 [401a6956f] Disallow COPY FREEZE on foreign tables.
+-->
+
+<listitem>
+<para>
+Disallow COPY FREEZE on foreign tables (Nathan Bossart)
+<ulink url="&commit_baseurl;401a6956f">§</ulink>
+</para>
+
+<para>
+Previously, the COPY worked but the FREEZE was ignored, so disallow this command.
+</para>
+</listitem>
+
+ </itemizedlist>
+ </sect4>
+
+ <sect4 id="release-18-explain">
+ <title><link linkend="sql-explain"><command>EXPLAIN</command></link></title>
+
+ <itemizedlist>
+
+<!--
+2024-12-11 [c2a4078eb] Enable BUFFERS with EXPLAIN ANALYZE by default
+-->
+
+<listitem>
+<para>
+Automatically include BUFFERS output in EXPLAIN ANALYZE (Guillaume Lelarge, David Rowley)
+<ulink url="&commit_baseurl;c2a4078eb">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-08-13 [4c1b4cdb8] Add resource statistics reporting to ANALYZE VERBOSE.
+2024-09-09 [bb7775234] Add WAL usage reporting to ANALYZE VERBOSE output.
+-->
+
+<listitem>
+<para>
+Add WAL, CPU, and average read statistics output EXPLAIN ANALYZE VERBOSE (Anthonin Bonnefoy)
+<ulink url="&commit_baseurl;4c1b4cdb8">§</ulink>
+<ulink url="&commit_baseurl;bb7775234">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-02-17 [320545bfc] Add information about WAL buffers being full to EXPLAIN
+2025-02-17 [6a8a7ce47] Add information about WAL buffers full to VACUUM/ANALYZE
+-->
+
+<listitem>
+<para>
+Add full WAL buffer count to EXPLAIN (WAL), VACUUM/ANALYZE (VERBOSE), and autovacuum log output (Bertrand Drouvot)
+<ulink url="&commit_baseurl;320545bfc">§</ulink>
+<ulink url="&commit_baseurl;6a8a7ce47">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-11 [0fbceae84] Show index search count in EXPLAIN ANALYZE, take 2.
+-->
+
+<listitem>
+<para>
+In EXPLAIN ANALYZE, report the number of index lookups used per index scan node (Peter Geoghegan)
+<ulink url="&commit_baseurl;0fbceae84">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-02-21 [ddb17e387] Allow EXPLAIN to indicate fractional rows.
+2025-02-27 [95dbd827f] EXPLAIN: Always use two fractional digits for row counts
+-->
+
+<listitem>
+<para>
+Modify EXPLAIN to output fractional row counts (Ibrar Ahmed, Ilia Evdokimov, Robert Haas)
+<ulink url="&commit_baseurl;ddb17e387">§</ulink>
+<ulink url="&commit_baseurl;95dbd827f">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-07-05 [1eff8279d] Add memory/disk usage for Material nodes in EXPLAIN
+2024-07-05 [53abb1e0e] Fix newly introduced issue in EXPLAIN for Materialize no
+2024-09-17 [95d6e9af0] Add memory/disk usage for Window aggregate nodes in EXPL
+2024-09-23 [40708acd6] Add memory/disk usage for more executor nodes.
+-->
+
+<listitem>
+<para>
+Add memory and disk usage details to Material, Window Aggregate, and common table expression nodes in EXPLAIN (David Rowley, Tatsuo Ishii)
+<ulink url="&commit_baseurl;1eff8279d">§</ulink>
+<ulink url="&commit_baseurl;53abb1e0e">§</ulink>
+<ulink url="&commit_baseurl;95d6e9af0">§</ulink>
+<ulink url="&commit_baseurl;40708acd6">§</ulink>
+</para>
+</listitem>
+
+
+<!--
+2025-03-11 [8b1b34254] Improve EXPLAIN's display of window functions.
+-->
+
+<listitem>
+<para>
+Add details about window function arguments to EXPLAIN output (Tom Lane)
+<ulink url="&commit_baseurl;8b1b34254">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-07-09 [5a1e6df3b] Show Parallel Bitmap Heap Scan worker stats in EXPLAIN A
+-->
+
+<listitem>
+<para>
+Add "Parallel Bitmap Heap Scan" worker cache statistics to EXPLAIN ANALYZE (David Geier, Heikki Linnakangas, Donghang Lin, Alena Rybakina, David Rowley)
+<ulink url="&commit_baseurl;5a1e6df3b">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-08-21 [c01743aa4] Show number of disabled nodes in EXPLAIN ANALYZE output.
+2024-10-11 [161320b4b] Adjust EXPLAIN's output for disabled nodes
+2024-10-29 [84b8fccbe] Doc: add detail about EXPLAIN's "Disabled" property
+-->
+
+<listitem>
+<para>
+Indicate disabled nodes in EXPLAIN ANALYZE output (Robert Haas, David Rowley, Laurenz Albe)
+<ulink url="&commit_baseurl;c01743aa4">§</ulink>
+<ulink url="&commit_baseurl;161320b4b">§</ulink>
+<ulink url="&commit_baseurl;84b8fccbe">§</ulink>
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ </sect3>
+
+ <sect3 id="release-18-datatypes">
+ <title>Data Types</title>
+
+ <itemizedlist>
+
+<!--
+2025-01-23 [4e7f62bc3] Add support for Unicode case folding.
+-->
+
+<listitem>
+<para>
+Add support for Unicode case folding (Jeff Davis)
+<ulink url="&commit_baseurl;4e7f62bc3">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-01-17 [286a365b9] Support Unicode full case mapping and conversion.
+-->
+
+<listitem>
+<para>
+Improve Unicode full case mapping and conversion (Jeff Davis)
+<ulink url="&commit_baseurl;286a365b9">§</ulink>
+</para>
+
+<para>
+This adds the ability to do conditional and title case mapping, and case map single characters to multiple characters.
+</para>
+</listitem>
+
+<!--
+2025-01-24 [a5579a90a] Make jsonb casts to scalar types translate JSON null to
+-->
+
+<listitem>
+<para>
+Allow jsonb NULL values to be cast to scalar types as NULL (Tom Lane)
+<ulink url="&commit_baseurl;a5579a90a">§</ulink>
+</para>
+
+<para>
+Previously such casts generated an error.
+</para>
+</listitem>
+
+<!--
+2025-03-05 [4603903d2] Allow json{b}_strip_nulls to remove null array elements
+-->
+
+<listitem>
+<para>
+Add optional parameter to json{b}_strip_nulls to allow removal of null array elements (Florents Tselai)
+<ulink url="&commit_baseurl;4603903d2">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-04-01 [6c12ae09f] Introduce a SQL-callable function array_sort(anyarray).
+-->
+
+<listitem>
+<para>
+Add function array_sort() which sorts an array's first dimension (Junwang Zhao, Jian He)
+<ulink url="&commit_baseurl;6c12ae09f">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-11-01 [49d6c7d8d] Add SQL function array_reverse()
+-->
+
+<listitem>
+<para>
+Add function array_reverse() which reverses an array's first dimension (Aleksander Alekseev)
+<ulink url="&commit_baseurl;49d6c7d8d">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-13 [0697b2390] Add reverse(bytea).
+-->
+
+<listitem>
+<para>
+Add function reverse() to reverse bytea bytes (Aleksander Alekseev)
+<ulink url="&commit_baseurl;0697b2390">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-07 [6da469bad] Allow casting between bytea and integer types.
+-->
+
+<listitem>
+<para>
+Allow casting between integer types and bytea (Aleksander Alekseev)
+<ulink url="&commit_baseurl;6da469bad">§</ulink>
+</para>
+
+<para>
+The integer values are stored as bytea two's complement values.
+</para>
+</listitem>
+
+<!--
+2025-04-03 [82a46cca9] Update Unicode data to Unicode 16.0.0
+-->
+
+<listitem>
+<para>
+Update Unicode data to Unicode 16.0.0 (Peter Eisentraut)
+<ulink url="&commit_baseurl;82a46cca9">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-02-18 [b464e51ab] Update to latest Snowball sources.
+-->
+
+<listitem>
+<para>
+Add full text search stemming for Estonian (Tom Lane)
+<ulink url="&commit_baseurl;b464e51ab">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-09-24 [cd838e200] Neaten up our choices of SQLSTATEs for XML-related error
+-->
+
+<listitem>
+<para>
+Improve the XML error codes to more closely match the SQL standard (Tom Lane)
+<ulink url="&commit_baseurl;cd838e200">§</ulink>
+</para>
+
+<para>
+These errors are reported via SQLSTATE.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect3>
+
+ <sect3 id="release-18-functions">
+ <title>Functions</title>
+
+ <itemizedlist>
+
+<!--
+2025-01-24 [bfc599206] Add SQL function CASEFOLD().
+-->
+
+<listitem>
+<para>
+Add function CASEFOLD() to allow for more sophisticated case-insensitive matching (Jeff Davis)
+<ulink url="&commit_baseurl;bfc599206">§</ulink>
+</para>
+
+<para>
+Allows more accurate comparison, i.e., a character can have multiple upper or lower case equivalents, or upper or lower case conversion changes the number of characters.
+</para>
+</listitem>
+
+<!--
+2024-07-11 [a0f1fce80] Add min and max aggregates for composite types (records)
+2024-10-08 [2d24fd942] Add min and max aggregates for bytea type.
+-->
+
+<listitem>
+<para>
+Allow MIN/MAX aggregates on arrays and composite types (Aleksander Alekseev, Marat Buharov)
+<ulink url="&commit_baseurl;a0f1fce80">§</ulink>
+<ulink url="&commit_baseurl;2d24fd942">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-08-16 [6be39d77a] Fix extraction of week and quarter fields from intervals
+-->
+
+<listitem>
+<para>
+Add a WEEK option to EXTRACT (Tom Lane)
+<ulink url="&commit_baseurl;6be39d77a">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-08-16 [6be39d77a] Fix extraction of week and quarter fields from intervals
+-->
+
+<listitem>
+<para>
+Improve the output EXTRACT(QUARTER ...) for negative values (Tom Lane)
+<ulink url="&commit_baseurl;6be39d77a">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-01-22 [172e6b3ad] Support RN (roman-numeral format) in to_number().
+-->
+
+<listitem>
+<para>
+Add roman numeral support to to_number() (Hunaid Sohail)
+<ulink url="&commit_baseurl;172e6b3ad">§</ulink>
+</para>
+
+<para>
+This is accessed via the "RN" pattern.
+</para>
+</listitem>
+
+<!--
+2024-12-11 [78c5e141e] Add UUID version 7 generation function.
+-->
+
+<listitem>
+<para>
+Add UUID version 7 generation function uuidv7() (Andrey Borodin)
+<ulink url="&commit_baseurl;78c5e141e">§</ulink>
+</para>
+
+<para>
+This UUID value is temporally sortable. Function uuidv4() has been added to explicitly generate version 4 UUIDs.
+</para>
+</listitem>
+
+<!--
+2024-08-12 [760162fed] Add user-callable CRC functions.
+-->
+
+<listitem>
+<para>
+Add functions crc32() and crc32c to compute CRC values (Aleksander Alekseev)
+<ulink url="&commit_baseurl;760162fed">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-26 [a3b6dfd41] Add support for gamma() and lgamma() functions.
+-->
+
+<listitem>
+<para>
+Add math functions gamma() and lgamma() (Dean Rasheed)
+<ulink url="&commit_baseurl;a3b6dfd41">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-03 [246dedc5d] Allow => syntax for named cursor arguments in plpgsql.
+-->
+
+<listitem>
+<para>
+Allow "=>" syntax for named cursor arguments in plpgsql (Pavel Stehule)
+<ulink url="&commit_baseurl;246dedc5d">§</ulink>
+</para>
+
+<para>
+We previously only accepted ":=".
+</para>
+</listitem>
+
+<!--
+2024-07-25 [580f8727c] Add argument names to the regexp_XXX functions.
+-->
+
+<listitem>
+<para>
+Allow regexp_match[es]/regexp_like/regexp_replace/regexp_count/regexp_instr/regexp_substr/regexp_split_to_table/regexp_split_to_array() to use named arguments (Jian He)
+<ulink url="&commit_baseurl;580f8727c">§</ulink>
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect3>
+
+ <sect3 id="release-18-libpq">
+ <title><link linkend="libpq">libpq</link></title>
+
+ <itemizedlist>
+
+<!--
+2024-09-09 [cdb6b0fdb] Add PQfullProtocolVersion() to surface the precise proto
+-->
+
+<listitem>
+<para>
+Add function PQfullProtocolVersion() to report the full, including minor, protocol version number (Jacob Champion, Jelte Fennema-Nio)
+<ulink url="&commit_baseurl;cdb6b0fdb">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-04-02 [285613c60] libpq: Add min/max_protocol_version connection options
+-->
+
+<listitem>
+<para>
+Add libpq functions and environment variables to specify the minimum and maximum acceptable protocol version for connections (Jelte Fennema-Nio)
+<ulink url="&commit_baseurl;285613c60">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-12-18 [4b99fed75] libpq: Add service name to PGconn and PQservice()
+-->
+
+<listitem>
+<para>
+Add libpq function PQservice() to return the connection service name (Michael Banck)
+<ulink url="&commit_baseurl;4b99fed75">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-08-19 [28a1121fd] Mark search_path as GUC_REPORT
+2024-08-19 [0d06a7eac] Document that search_path is reported by the server
+-->
+
+<listitem>
+<para>
+Report search_path changes to the client (Alexander Kukushkin, Jelte Fennema-Nio, Tomas Vondra)
+<ulink url="&commit_baseurl;28a1121fd">§</ulink>
+<ulink url="&commit_baseurl;0d06a7eac">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-08-12 [ea92f3a0a] libpq: Trace frontend authentication challenges
+2024-08-14 [a5c6b8f22] libpq: Trace responses to SSLRequest and GSSENCRequest
+2024-08-16 [b8b3f861f] libpq: Trace all messages received from the server
+2025-02-24 [e87c14b19] libpq: Trace all NegotiateProtocolVersion fields
+-->
+
+<listitem>
+<para>
+Add PQtrace() output for all message types, including authentication (Jelte Fennema-Nio)
+<ulink url="&commit_baseurl;ea92f3a0a">§</ulink>
+<ulink url="&commit_baseurl;a5c6b8f22">§</ulink>
+<ulink url="&commit_baseurl;b8b3f861f">§</ulink>
+<ulink url="&commit_baseurl;e87c14b19">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-04-03 [2da74d8d6] libpq: Add support for dumping SSL key material to file
+-->
+
+<listitem>
+<para>
+Add libpq connection parameter sslkeylogfile which dumps out SSL key material (Abhishek Chanda, Daniel Gustafsson)
+<ulink url="&commit_baseurl;2da74d8d6">§</ulink>
+</para>
+
+<para>
+This is useful for debugging.
+</para>
+</listitem>
+
+<!--
+2025-03-25 [3c86223c9] libpq: Deprecate pg_int64.
+-->
+
+<listitem>
+<para>
+Modify some libpq function signatures to use int64_t (Thomas Munro)
+<ulink url="&commit_baseurl;3c86223c9">§</ulink>
+</para>
+
+<para>
+These previously used pg_int64, which is now deprecated.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect3>
+
+ <sect3 id="release-18-psql">
+ <title><xref linkend="app-psql"/></title>
+
+ <itemizedlist>
+
+<!--
+2024-08-22 [d55322b0d] psql: Add more meta-commands able to use the extended pr
+-->
+
+<listitem>
+<para>
+Allow psql to parse, bind, and close named prepared statements (Anthonin Bonnefoy, Michael Paquier)
+<ulink url="&commit_baseurl;d55322b0d">§</ulink>
+</para>
+
+<para>
+This is accomplished with new commands \parse, \bind_named, and \close.
+</para>
+</listitem>
+
+<!--
+2025-02-21 [41625ab8e] psql: Add support for pipelines
+2025-03-18 [17caf6644] psql: Add \sendpipeline to send query buffers while in a
+2025-03-19 [2cce0fe44] psql: Allow queries terminated by semicolons while in pi
+-->
+
+<listitem>
+<para>
+Add psql backslash commands to allowing issuance of pipeline queries (Anthonin Bonnefoy)
+<ulink url="&commit_baseurl;41625ab8e">§</ulink>
+<ulink url="&commit_baseurl;17caf6644">§</ulink>
+<ulink url="&commit_baseurl;2cce0fe44">§</ulink>
+</para>
+
+<para>
+The new commands are \startpipeline, \syncpipeline, \sendpipeline, \endpipeline, \flushrequest, \flush, and \getresults.
+</para>
+</listitem>
+
+<!--
+2025-02-25 [3ce357584] psql: Add pipeline status to prompt and some state varia
+-->
+
+<listitem>
+<para>
+Add psql pipeline status to the prompt and add related state variables (Anthonin Bonnefoy)
+<ulink url="&commit_baseurl;3ce357584">§</ulink>
+</para>
+
+<para>
+The new prompt character is "%P" and the new psql variables are PIPELINE_SYNC_COUNT, PIPELINE_COMMAND_COUNT, and PIPELINE_RESULT_COUNT.
+</para>
+</listitem>
+
+<!--
+2024-12-18 [477728b5d] psql: Add more information about service name
+-->
+
+<listitem>
+<para>
+Allow psql to display the connection service name in the psql prompt or access it via psql variable (Michael Banck)
+<ulink url="&commit_baseurl;477728b5d">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-02-22 [bba2fbc62] Change \conninfo to use tabular format
+-->
+
+<listitem>
+<para>
+Change psql's \conninfo to use tabular format and include more information (Álvaro Herrera, Maiquel Grassi, Hunaid Sohail)
+<ulink url="&commit_baseurl;bba2fbc62">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-01-14 [00f4c2959] psql: Add option to use expanded mode to all list comman
+-->
+
+<listitem>
+<para>
+Add psql option to use expanded mode on all list commands (Dean Rasheed)
+<ulink url="&commit_baseurl;00f4c2959">§</ulink>
+</para>
+
+<para>
+Adding 'x' enables this.
+</para>
+</listitem>
+
+<!--
+2025-01-14 [2355e5111] psql: Add proof indicator to \df+, \do+, \dAo+, and
+-->
+
+<listitem>
+<para>
+Add function proof indicator psql's \df+, \do+, \dAo+, and \dC+ outputs (Yugo Nagata)
+<ulink url="&commit_baseurl;2355e5111">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-07-02 [978f38c77] Add information about access method for partitioned rela
+-->
+
+<listitem>
+<para>
+Add access method details for partitioned relations in \dP+ (Justin Pryzby)
+<ulink url="&commit_baseurl;978f38c77">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-24 [d696406a9] psql: show default extension version in \dx output
+-->
+
+<listitem>
+<para>
+Add "default_version" to the psql \dx extension output (Magnus Hagander)
+<ulink url="&commit_baseurl;d696406a9">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-25 [1a759c832] psql: Make default \watch interval configurable
+-->
+
+<listitem>
+<para>
+Add psql variable WATCH_INTERVAL to set the default \watch wait time (Daniel Gustafsson)
+<ulink url="&commit_baseurl;1a759c832">§</ulink>
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect3>
+
+ <sect3 id="release-18-server-apps">
+ <title>Server Applications</title>
+
+ <itemizedlist>
+
+<!--
+2024-10-01 [983a588e0] initdb: Add new option "- -no-data-checksums"
+2024-10-16 [04bec894a] initdb: Change default to using data checksums.
+-->
+
+<listitem>
+<para>
+Change initdb to default to enabling checksums (Greg Sabino Mullane)
+<ulink url="&commit_baseurl;983a588e0">§</ulink>
+<ulink url="&commit_baseurl;04bec894a">§</ulink>
+</para>
+
+<para>
+The new initdb option --no-data-checksums disables checksums.
+</para>
+</listitem>
+
+<!--
+2025-03-25 [cf131fa94] initdb: Add - -no-sync-data-files.
+-->
+
+<listitem>
+<para>
+Add initdb option --no-sync-data-files to avoid syncing heap/index files (Nathan Bossart)
+<ulink url="&commit_baseurl;cf131fa94">§</ulink>
+</para>
+
+<para>
+initdb --no-sync is still available to avoid syncing any files.
+</para>
+</listitem>
+
+<!--
+2025-03-18 [edba754f0] vacuumdb: Add option for analyzing only relations missin
+2025-04-30 [987910502] vacuumdb: Don't skip empty relations in - -missing-stats-
+-->
+
+<listitem>
+<para>
+Add vacuumdb option --missing-stats-only to compute only missing optimizer statistics (Corey Huinker, Nathan Bossart)
+<ulink url="&commit_baseurl;edba754f0">§</ulink>
+<ulink url="&commit_baseurl;987910502">§</ulink>
+</para>
+
+<para>
+This option can only be used by --analyze-only and --analyze-in-stages.
+</para>
+</listitem>
+
+<!--
+2025-03-17 [99aeb8470] pg_combinebackup: Add -k, - -link option.
+-->
+
+<listitem>
+<para>
+Add pg_combinebackup option -k/--link to enable hard linking (Israel Barth Rubio, Robert Haas)
+<ulink url="&commit_baseurl;99aeb8470">§</ulink>
+</para>
+
+<para>
+Only some files can be hard linked, and should not be used if the backups will be used independently.
+</para>
+</listitem>
+
+<!--
+2024-09-27 [8dfd31290] pg_verifybackup: Verify tar-format backups.
+-->
+
+<listitem>
+<para>
+Allow pg_verifybackup to verify tar-format backups (Amul Sul)
+<ulink url="&commit_baseurl;8dfd31290">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-12 [4ecdd4110] pg_rewind: Add dbname to primary_conninfo when using - -w
+-->
+
+<listitem>
+<para>
+If pg_rewind's --source-server specifies a database name, use it for --write-recovery-conf output (Masahiko Sawada)
+<ulink url="&commit_baseurl;4ecdd4110">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-02-21 [30666d185] pg_resetwal: Add - -char-signedness option to change the
+-->
+
+<listitem>
+<para>
+Add pg_resetwal option --char-signedness to change the default char signedness (Masahiko Sawada)
+<ulink url="&commit_baseurl;30666d185">§</ulink>
+</para>
+</listitem>
+
+ </itemizedlist>
+
+
+ <sect4 id="release-18-pgdump">
+ <title><link linkend="app-pgdump"><application>pg_dump</application>, etc.</link></title>
+
+ <itemizedlist>
+
+<!--
+2025-04-04 [1495eff7b] Non text modes for pg_dumpall, correspondingly change pg
+-->
+
+<listitem>
+<para>
+Allow pg_dumpall to dump in the same output formats as pg_dump supports (Mahendra Singh Thalor, Andrew Dunstan)
+<ulink url="&commit_baseurl;1495eff7b">§</ulink>
+</para>
+
+<para>
+Also modify pg_restore to handle such dumps. Previously pg_dumpall only supported text format.
+</para>
+</listitem>
+
+<!--
+2025-03-25 [9c49f0e8c] pg_dump: Add - -sequence-data.
+-->
+
+<listitem>
+<para>
+Add pg_dump option --sequence-data to dump sequence data that would normally be excluded (Nathan Bossart)
+<ulink url="&commit_baseurl;9c49f0e8c">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-25 [bde2fb797] Add pg_dump - -with-{schema|data|statistics} options.
+-->
+
+<listitem>
+<para>
+Add pg_dump options --with-schema, --with-data, and --with_statistics (Jeff Davis)
+<ulink url="&commit_baseurl;bde2fb797">§</ulink>
+</para>
+
+<para>
+The negative versions of these options already existed.
+</para>
+</listitem>
+
+<!--
+2025-02-20 [1fd1bd871] Transfer statistics during pg_upgrade.
+-->
+
+<listitem>
+<para>
+Add pg_dump, pg_dumpall, and pg_restore options --statistics-only, --no-statistics, --no-data, and --no-schema (Corey Huinker, Jeff Davis)
+<ulink url="&commit_baseurl;1fd1bd871">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-16 [cd3c45125] pg_dump, pg_dumpall, pg_restore: Add - -no-policies optio
+-->
+
+<listitem>
+<para>
+Add option --no-policies to pg_dump, pg_dumpall, pg_restore to avoid policy specification (Nikolay Samokhvalov)
+<ulink url="&commit_baseurl;cd3c45125">§</ulink>
+</para>
+
+<para>
+This is useful for migrating to systems with different policies.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4 id="release-18-pgupgrade">
+ <title><link linkend="pgupgrade"><application>pg_upgrade</application></link></title>
+
+ <itemizedlist>
+
+<!--
+2025-02-20 [1fd1bd871] Transfer statistics during pg_upgrade.
+2025-03-18 [c9d502eb6] Update guidance for running vacuumdb after pg_upgrade.
+2025-04-30 [d5f1b6a75] Further adjust guidance for running vacuumdb after pg_up
+-->
+
+<listitem>
+<para>
+Allow pg_upgrade to preserve optimizer statistics (Corey Huinker, Jeff Davis, Nathan Bossart)
+<ulink url="&commit_baseurl;1fd1bd871">§</ulink>
+<ulink url="&commit_baseurl;c9d502eb6">§</ulink>
+<ulink url="&commit_baseurl;d5f1b6a75">§</ulink>
+</para>
+
+<para>
+Extended statistics are not preserved.
+</para>
+</listitem>
+
+<!--
+2025-02-20 [1fd1bd871] Transfer statistics during pg_upgrade.
+-->
+
+<listitem>
+<para>
+Add pg_upgrade option --no-statistics (Corey Huinker, Jeff Davis)
+<ulink url="&commit_baseurl;1fd1bd871">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-09-16 [40e2e5e92] Introduce framework for parallelizing various pg_upgrade
+2024-09-16 [6d3d2e8e5] pg_upgrade: Parallelize retrieving relation information.
+2024-09-16 [7baa36de5] pg_upgrade: Parallelize subscription check.
+2024-09-16 [46cad8b31] pg_upgrade: Parallelize retrieving loadable libraries.
+2024-09-16 [6ab8f27bc] pg_upgrade: Parallelize retrieving extension updates.
+2024-09-16 [bbf83cab9] pg_upgrade: Parallelize data type checks.
+2024-09-16 [9db3018cf] pg_upgrade: Parallelize contrib/isn check.
+2024-09-16 [c34eabfbb] pg_upgrade: Parallelize postfix operator check.
+2024-09-16 [cf2f82a37] pg_upgrade: Parallelize incompatible polymorphics check.
+2024-09-16 [f93f5f7b9] pg_upgrade: Parallelize WITH OIDS check.
+2024-09-16 [c880cf258] pg_upgrade: Parallelize encoding conversion check.
+-->
+
+<listitem>
+<para>
+Allow pg_upgrade to process database checks in parallel (Nathan Bossart)
+<ulink url="&commit_baseurl;40e2e5e92">§</ulink>
+<ulink url="&commit_baseurl;6d3d2e8e5">§</ulink>
+<ulink url="&commit_baseurl;7baa36de5">§</ulink>
+<ulink url="&commit_baseurl;46cad8b31">§</ulink>
+<ulink url="&commit_baseurl;6ab8f27bc">§</ulink>
+<ulink url="&commit_baseurl;bbf83cab9">§</ulink>
+<ulink url="&commit_baseurl;9db3018cf">§</ulink>
+<ulink url="&commit_baseurl;c34eabfbb">§</ulink>
+<ulink url="&commit_baseurl;cf2f82a37">§</ulink>
+<ulink url="&commit_baseurl;f93f5f7b9">§</ulink>
+<ulink url="&commit_baseurl;c880cf258">§</ulink>
+</para>
+
+<para>
+This is controlled by the existing --jobs option.
+</para>
+</listitem>
+
+<!--
+2025-03-25 [626d7236b] pg_upgrade: Add - -swap for faster file transfer.
+-->
+
+<listitem>
+<para>
+Add pg_upgrade option --swap to swap directories rather than copy, clone, or link files (Nathan Bossart)
+<ulink url="&commit_baseurl;626d7236b">§</ulink>
+</para>
+
+<para>
+This mode is potentially the fastest.
+</para>
+</listitem>
+
+<!--
+2025-02-21 [a8238f87f] pg_upgrade: Preserve default char signedness value from
+2025-02-21 [1aab68059] pg_upgrade: Add - -set-char-signedness to set the default
+-->
+
+<listitem>
+<para>
+Add pg_upgrade option --set-char-signedness to set the default char signedness of new cluster (Masahiko Sawada)
+<ulink url="&commit_baseurl;a8238f87f">§</ulink>
+<ulink url="&commit_baseurl;1aab68059">§</ulink>
+</para>
+
+<para>
+This is to handle cases where a pre-Postgres 18 cluster's default CPU signedness does not match the new cluster.
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4 id="release-18-logicalrep-app">
+ <title>Logical Replication Applications></title>
+
+ <itemizedlist>
+
+<!--
+2025-03-28 [fb2ea12f4] pg_createsubscriber: Add '- -all' option.
+-->
+
+<listitem>
+<para>
+Add pg_createsubscriber option --all to create logical replicas for all databases (Shubham Khanna)
+<ulink url="&commit_baseurl;fb2ea12f4">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-20 [e5aeed4b8] pg_createsubscriber: Add -R publications option.
+-->
+
+<listitem>
+<para>
+Add pg_createsubscriber option -R/--remove to remove publications (Shubham Khanna)
+<ulink url="&commit_baseurl;e5aeed4b8">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-02-26 [e117cfb2f] Add two-phase option in pg_createsubscriber.
+-->
+
+<listitem>
+<para>
+Add pg_createsubscriber option --enable-two-phase to enable prepared transactions (Shubham Khanna)
+<ulink url="&commit_baseurl;e117cfb2f">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-04-04 [cf2655a90] pg_recvlogical: Add - -failover option.
+-->
+
+<listitem>
+<para>
+Add pg_recvlogical option --failover to specify failover slots (Hayato Kuroda)
+<ulink url="&commit_baseurl;cf2655a90">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-25 [c68100aa4] Allow pg_recvlogical - -drop-slot to work without - -dbnam
+-->
+
+<listitem>
+<para>
+Allow pg_recvlogical --drop-slot to work without --dbname (Hayato Kuroda)
+<ulink url="&commit_baseurl;c68100aa4">§</ulink>
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ </sect3>
+
+ <sect3 id="release-18-source-code">
+ <title>Source Code</title>
+
+ <itemizedlist>
+
+<!--
+2024-07-05 [4b211003e] Support loading of injection points
+2024-07-18 [a0a5869a8] Add INJECTION_POINT_CACHED() to run injection points dir
+-->
+
+<listitem>
+<para>
+Separate the loading and running of injection points (Michael Paquier, Heikki Linnakangas)
+<ulink url="&commit_baseurl;4b211003e">§</ulink>
+<ulink url="&commit_baseurl;a0a5869a8">§</ulink>
+</para>
+
+<para>
+Injection points can now be created, but not run, via INJECTION_POINT_LOAD(), and such injection points can be run via INJECTION_POINT_CACHED().
+</para>
+</listitem>
+
+<!--
+2024-07-26 [20e0e7da9] Add test for early backend startup errors
+-->
+
+<listitem>
+<para>
+Allow inline injection point test code with IS_INJECTION_POINT_ATTACHED() (Heikki Linnakangas)
+<ulink url="&commit_baseurl;20e0e7da9">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-08-05 [ca6fde922] Optimize JSON escaping using SIMD
+-->
+
+<listitem>
+<para>
+Improve the performance of processing long JSON strings using SIMD instructions (David Rowley)
+<ulink url="&commit_baseurl;ca6fde922">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-04-06 [3c6e8c123] Compute CRC32C using AVX-512 instructions where availabl
+-->
+
+<listitem>
+<para>
+Speed up CRC32C calculations using x86 AVX-512 instructions (Raghuveer Devulapalli, Paul Amonson)
+<ulink url="&commit_baseurl;3c6e8c123">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-28 [6be53c276] Optimize popcount functions with ARM Neon intrinsics.
+2025-03-28 [519338ace] Optimize popcount functions with ARM SVE intrinsics.
+-->
+
+<listitem>
+<para>
+Add ARM Neon and SVE CPU intrinsics for popcount (integer bit counting) (Chiranmoy Bhattacharya, Devanga Susmitha, Rama Malladi)
+<ulink url="&commit_baseurl;6be53c276">§</ulink>
+<ulink url="&commit_baseurl;519338ace">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-08-15 [8dc28d7eb] Optimise numeric multiplication using base-NBASE^2 arith
+-->
+
+<listitem>
+<para>
+Improve the speed of multiplication (Joel Jacobson, Dean Rasheed)
+<ulink url="&commit_baseurl;8dc28d7eb">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-04-07 [65c298f61] Add support for basic NUMA awareness
+2025-04-07 [8cc139bec] Introduce pg_shmem_allocations_numa view
+2025-04-07 [ba2a3c230] Add pg_buffercache_numa view with NUMA node info
+-->
+
+<listitem>
+<para>
+Add configure option --with-libnuma to enable NUMA awareness (Jakub Wartak, Bertrand Drouvot)
+<ulink url="&commit_baseurl;65c298f61">§</ulink>
+<ulink url="&commit_baseurl;8cc139bec">§</ulink>
+<ulink url="&commit_baseurl;ba2a3c230">§</ulink>
+</para>
+
+<para>
+The function pg_numa_available() reports on NUMA awareness, and system views pg_shmem_allocations_numa and pg_buffercache_numa which report on shared memory distribution across
+NUMA nodes.
+</para>
+</listitem>
+
+<!--
+2024-09-18 [b52c4fc3c] Add TOAST table to pg_index.
+-->
+
+<listitem>
+<para>
+Add TOAST table to pg_index to allow for very large index expression indexes (Nathan Bossart)
+<ulink url="&commit_baseurl;b52c4fc3c">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-12-20 [02a8d0c45] Remove pg_attribute.attcacheoff column
+-->
+
+<listitem>
+<para>
+Remove column pg_attribute.attcacheoff (David Rowley)
+<ulink url="&commit_baseurl;02a8d0c45">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-03 [99f8f3fbb] Add relallfrozen to pg_class
+-->
+
+<listitem>
+<para>
+Add column pg_class.relallfrozen (Melanie Plageman)
+<ulink url="&commit_baseurl;99f8f3fbb">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-09-10 [56fead44d] Add amgettreeheight index AM API routine
+2025-03-07 [af4002b38] Rename amcancrosscompare
+-->
+
+<listitem>
+<para>
+Add amgettreeheight, amconsistentequality, and amconsistentordering to the index access method API (Mark Dilger)
+<ulink url="&commit_baseurl;56fead44d">§</ulink>
+<ulink url="&commit_baseurl;af4002b38">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-09-17 [7406ab623] Add stratnum GiST support function
+-->
+
+<listitem>
+<para>
+Add GiST support function stratnum (Paul A. Jungwirth)
+<ulink url="&commit_baseurl;7406ab623">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-02-21 [44fe30fda] Add default_char_signedness field to ControlFileData.
+-->
+
+<listitem>
+<para>
+Record the default CPU signedness of "char" in pg_controldata (Masahiko Sawada)
+<ulink url="&commit_baseurl;44fe30fda">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-12 [72a3d0462] Prepare for Python "Limited API" in PL/Python
+2025-03-14 [0793ab810] Activate Python "Limited API" in PL/Python
+-->
+
+<listitem>
+<para>
+Add support for Python "Limited API" in PL/Python (Peter Eisentraut)
+<ulink url="&commit_baseurl;72a3d0462">§</ulink>
+<ulink url="&commit_baseurl;0793ab810">§</ulink>
+</para>
+
+<para>
+This helps prevent problems caused by Python 3.x version mismatches.
+</para>
+</listitem>
+
+<!--
+2025-04-29 [45363fca6] Bump the minimum supported Python version to 3.6.8
+-->
+
+<listitem>
+<para>
+Change the minimum supported Python version to 3.6.8 (Jacob Champion)
+<ulink url="&commit_baseurl;45363fca6">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-09-02 [a70e01d43] Remove support for OpenSSL older than 1.1.0
+2024-10-24 [6c66b7443] Raise the minimum supported OpenSSL version to 1.1.1
+-->
+
+<listitem>
+<para>
+Remove support for OpenSSL versions older than 1.1.1 (Daniel Gustafsson)
+<ulink url="&commit_baseurl;a70e01d43">§</ulink>
+<ulink url="&commit_baseurl;6c66b7443">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-10-01 [972c2cd28] jit: Require at least LLVM 14, if enabled.
+-->
+
+<listitem>
+<para>
+If LLVM is enabled, require version 14 or later (Thomas Munro)
+<ulink url="&commit_baseurl;972c2cd28">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-26 [9324c8c58] Introduce PG_MODULE_MAGIC_EXT macro.
+-->
+
+<listitem>
+<para>
+Add macro PG_MODULE_MAGIC_EXT to allow extensions to report their name and version (Andrei Lepikhov)
+<ulink url="&commit_baseurl;9324c8c58">§</ulink>
+</para>
+
+<para>
+This information can be access via the new function pg_get_loaded_modules().
+</para>
+</listitem>
+
+<!--
+2024-09-09 [218527d01] Don't bother checking the result of SPI_connect[_ext] an
+-->
+
+<listitem>
+<para>
+Document that SPI_connect/SPI_connect_ext() always returns success (SPI_OK_CONNECT) (Stepan Neretin)
+<ulink url="&commit_baseurl;218527d01">§</ulink>
+</para>
+
+<para>
+Errors are always reported via ereport().
+</para>
+</listitem>
+
+<!--
+2025-01-27 [5afaba629] doc: Meson is not experimental on Windows
+-->
+
+<listitem>
+<para>
+Remove the experimental designation of Meson builds on Windows (Aleksander Alekseev)
+<ulink url="&commit_baseurl;5afaba629">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-07-31 [e54a42ac9] Add API and ABI stability guidance to the C language doc
+-->
+
+<listitem>
+<para>
+Add documentation section about API and ABI compatibility (David Wheeler, Peter Eisentraut)
+<ulink url="&commit_baseurl;e54a42ac9">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-07-30 [e25626677] Remove - -disable-spinlocks.
+-->
+
+<listitem>
+<para>
+Remove configure option --disable-spinlocks (Thomas Munro)
+<ulink url="&commit_baseurl;e25626677">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-07-30 [813852613] Remove - -disable-atomics, require 32 bit atomics.
+-->
+
+<listitem>
+<para>
+Remove configure option --disable-atomics (Thomas Munro)
+<ulink url="&commit_baseurl;813852613">§</ulink>
+</para>
+
+<para>
+Thirty-two bit atomic operations are now required.
+</para>
+</listitem>
+
+<!--
+2024-07-01 [edadeb071] Remove support for HPPA (a/k/a PA-RISC) architecture.
+-->
+
+<listitem>
+<para>
+Remove support for HPPA/PA-RISC architecture (Tom Lane)
+<ulink url="&commit_baseurl;edadeb071">§</ulink>
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect3>
+
+ <sect3 id="release-18-modules">
+ <title>Additional Modules</title>
+
+ <itemizedlist>
+
+<!--
+2024-10-14 [7cdfeee32] Add contrib/pg_logicalinspect.
+-->
+
+<listitem>
+<para>
+Add extension pg_logicalinspect to inspect logical snapshots (Bertrand Drouvot)
+<ulink url="&commit_baseurl;7cdfeee32">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-26 [8d5ceb113] pg_overexplain: Additional EXPLAIN options for debugging
+-->
+
+<listitem>
+<para>
+Add extension pg_overexplain which allows for additional EXPLAIN output useful for debugging (Robert Haas)
+<ulink url="&commit_baseurl;8d5ceb113">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-07-26 [c297a47c5] postgres_fdw: Add "used_in_xact" column to postgres_fdw_
+2024-07-26 [857df3cef] postgres_fdw: Add connection status check to postgres_fd
+2024-09-18 [4f08ab554] postgres_fdw: Extend postgres_fdw_get_connections to ret
+2025-03-03 [fe186bda7] postgres_fdw: Extend postgres_fdw_get_connections to ret
+-->
+
+<listitem>
+<para>
+Add output columns to postgres_fdw_get_connections() (Hayato Kuroda, Sagar Dilip Shedge)
+<ulink url="&commit_baseurl;c297a47c5">§</ulink>
+<ulink url="&commit_baseurl;857df3cef">§</ulink>
+<ulink url="&commit_baseurl;4f08ab554">§</ulink>
+<ulink url="&commit_baseurl;fe186bda7">§</ulink>
+</para>
+
+<para>
+New output column "used_in_xact" indicates if the foreign data wrapper is being used by a current transaction, and "closed" indicates if it is closed, "user_name" indicates the
+user name, and "remote_backend_pid" indicates the remote backend process identifier.
+</para>
+</listitem>
+
+<!--
+2025-01-15 [761c79508] postgres_fdw: SCRAM authentication pass-through
+-->
+
+<listitem>
+<para>
+Allow SCRAM authentication from the client to be passed to postgres_fdw servers (Matheus Alcantara, Peter Eisentraut)
+<ulink url="&commit_baseurl;761c79508">§</ulink>
+</para>
+
+<para>
+This avoids storing postgres_fdw authentication information in the database, and is enabled with the postgres_fdw "use_scram_passthrough" connection option. libpq uses new connection
+parameters scram_client_key and scram_server_key.
+</para>
+</listitem>
+
+<!--
+2025-03-26 [3642df265] dblink: SCRAM authentication pass-through
+-->
+
+<listitem>
+<para>
+Allow SCRAM authentication from the client to be passed to dblink servers (Matheus Alcantara)
+<ulink url="&commit_baseurl;3642df265">§</ulink>
+</para>
+</listitem>
+
+<!--
+2024-11-20 [6c8f67032] file_fdw: Add REJECT_LIMIT option to file_fdw.
+-->
+
+<listitem>
+<para>
+Add REJECT_LIMIT to control the number of invalid rows file_fdw can ignore (Atsushi Torikoshi)
+<ulink url="&commit_baseurl;6c8f67032">§</ulink>
+</para>
+
+<para>
+This is active when ON_ERROR = 'ignore'.
+</para>
+</listitem>
+
+<!--
+2024-10-03 [a1c4c8a9e] file_fdw: Add on_error and log_verbosity options to file
+-->
+
+<listitem>
+<para>
+Add on_error and log_verbosity options to file_fdw (Atsushi Torikoshi)
+<ulink url="&commit_baseurl;a1c4c8a9e">§</ulink>
+</para>
+
+<para>
+These control how file_fdw handles and reports invalid file rows.
+</para>
+</listitem>
+
+<!--
+2025-01-07 [f7e1b3828] Add passwordcheck.min_password_length.
+-->
+
+<listitem>
+<para>
+Add configurable variable min_password_length to passwordcheck (Emanuele Musella, Maurizio Boriani)
+<ulink url="&commit_baseurl;f7e1b3828">§</ulink>
+</para>
+
+<para>
+This controls the minimum password length.
+</para>
+</listitem>
+
+<!--
+2024-10-11 [cae0f3c40] pgbench: Improve result outputs related to failed transa
+-->
+
+<listitem>
+<para>
+Have pgbench report the number of failed transactions (Yugo Nagata)
+<ulink url="&commit_baseurl;cae0f3c40">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-16 [448904423] contrib/isn: Make weak mode a GUC setting, and fix relat
+-->
+
+<listitem>
+<para>
+Add isn server variable "weak" to control invalid check digit acceptance (Viktor Holmberg)
+<ulink url="&commit_baseurl;448904423">§</ulink>
+</para>
+
+<para>
+This was previously only controlled by function isn_weak().
+</para>
+</listitem>
+
+<!--
+2025-04-03 [e4309f73f] Add support for sorted gist index builds to btree_gist
+-->
+
+<listitem>
+<para>
+Allow values to be sorted to speed btree_gist index builds (Bernd Helmle, Andrey Borodin)
+<ulink url="&commit_baseurl;e4309f73f">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-29 [14ffaece0] amcheck: Add gin_index_check() to verify GIN index
+-->
+
+<listitem>
+<para>
+Add amcheck function gin_index_check() to verify GIN indexes (Grigory Kryachko, Heikki Linnakangas, Andrey Borodin)
+<ulink url="&commit_baseurl;14ffaece0">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-04-08 [dcf7e1697] Add pg_buffercache_evict_{relation,all} functions
+-->
+
+<listitem>
+<para>
+Add functions pg_buffercache_evict_relation() and pg_buffercache_evict_all() to evict unpinned shared buffers (Nazir Bilal Yavuz)
+<ulink url="&commit_baseurl;dcf7e1697">§</ulink>
+</para>
+
+<para>
+The existing function pg_buffercache_evict() now returns the buffer flush status.
+</para>
+</listitem>
+
+<!--
+2024-08-04 [7949d9594] Introduce pluggable APIs for Cumulative Statistics
+2024-08-05 [2eff9e678] Add helper routines to retrieve data for custom fixed-nu
+-->
+
+<listitem>
+<para>
+Allow extensions to use the server's cumulative statistics API (Michael Paquier)
+<ulink url="&commit_baseurl;7949d9594">§</ulink>
+<ulink url="&commit_baseurl;2eff9e678">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-03-18 [c65bc2e1d] Make it possible for loadable modules to add EXPLAIN opt
+2025-03-18 [4fd02bf7c] Add some new hooks so extensions can add details to EXPL
+2025-03-20 [50ba65e73] Add an additional hook for EXPLAIN option validation.
+-->
+
+<listitem>
+<para>
+Allow extensions to install custom EXPLAIN options (Robert Haas, Sami Imseih)
+<ulink url="&commit_baseurl;c65bc2e1d">§</ulink>
+<ulink url="&commit_baseurl;4fd02bf7c">§</ulink>
+<ulink url="&commit_baseurl;50ba65e73">§</ulink>
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ <sect4 id="release-18-pgstatstatements">
+ <title><link linkend="pgstatstatements"><application>pg_stat_statements</application></link></title>
+
+ <itemizedlist>
+
+<!--
+2024-10-28 [6b652e6ce] Set query ID for inner queries of CREATE TABLE AS and DE
+-->
+
+<listitem>
+<para>
+Allow the queries of CREATE TABLE AS and DECLARE to be tracked by pg_stat_statements (Anthonin Bonnefoy)
+<ulink url="&commit_baseurl;6b652e6ce">§</ulink>
+</para>
+
+<para>
+They are also now assigned query ids.
+</para>
+</listitem>
+
+<!--
+2024-09-30 [dc6851596] Show values of SET statements as constants in pg_stat_st
+-->
+
+<listitem>
+<para>
+Allow the parameterization of SET values in pg_stat_statements (Greg Sabino Mullane, Michael Paquier)
+<ulink url="&commit_baseurl;dc6851596">§</ulink>
+</para>
+
+<para>
+This reduces the bloat caused by SET statements with differing constants.
+</para>
+</listitem>
+
+<!--
+2024-10-09 [cf54a2c00] pg_stat_statements: Add columns to track parallel worker
+-->
+
+<listitem>
+<para>
+Add pg_stat_statements columns to report parallel activity (Guillaume Lelarge)
+<ulink url="&commit_baseurl;cf54a2c00">§</ulink>
+</para>
+
+<para>
+The new columns are parallel_workers_to_launch and parallel_workers_launched.
+</para>
+</listitem>
+
+<!--
+2025-02-17 [ce5bcc4a9] pg_stat_statements: Add wal_buffers_full
+-->
+
+<listitem>
+<para>
+Add pg_stat_statements.wal_buffers_full to report full WAL buffers (Bertrand Drouvot)
+<ulink url="&commit_baseurl;ce5bcc4a9">§</ulink>
+</para>
+</listitem>
+
+ </itemizedlist>
+
+ </sect4>
+
+ <sect4 id="release-18-pgcrypto">
+ <title><link linkend="pgcrypto"><application>pgcrypto</application></link></title>
+
+ <itemizedlist>
+
+<!--
+2025-04-05 [749a9e20c] Add modern SHA-2 based password hashes to pgcrypto.
+-->
+
+<listitem>
+<para>
+Add pgcrypto functions sha256crypt() and sha512crypt() (Bernd Helmle)
+<ulink url="&commit_baseurl;749a9e20c">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-02-14 [9ad1b3d01] pgcrypto: Add support for CFB mode in AES encryption
+-->
+
+<listitem>
+<para>
+Add CFB mode to pgcrypto encryption and decryption (Umar Hayat)
+<ulink url="&commit_baseurl;9ad1b3d01">§</ulink>
+</para>
+</listitem>
+
+<!--
+2025-01-24 [035f99cbe] pgcrypto: Make it possible to disable built-in crypto
+-->
+
+<listitem>
+<para>
+Add pgcrypto server variable builtin_crypto_enabled to allow disabling builtin non-FIPS mode cryptographic functions (Daniel Gustafsson, Joe Conway)
+<ulink url="&commit_baseurl;035f99cbe">§</ulink>
+</para>
+
+<para>
+This is useful for guaranteeing FIPS mode behavior.
+</para>
+</listitem>
+
+ </itemizedlist>
+ </sect4>
+
+ </sect3>
+
+ </sect2>
+
+ <sect2 id="release-18-acknowledgements">
+ <title>Acknowledgments</title>
+
+ <para>
+ The following individuals (in alphabetical order) have contributed
+ to this release as authors, committers, reviewers, testers,
+ or reporters of issues.
+ </para>
+
+ <simplelist>
+ <member>(to be completed)</member>
+ </simplelist>
+ </sect2>
+
+ </sect1>
projects / postgresql.git / commitdiff