A dump/restore is not required for those running 15.X.
\nHowever, if you have any self-referential foreign key constraints on partitioned tables, it may be necessary to recreate those constraints to ensure that they are being enforced correctly. See the second changelog entry below.
\nAlso, if you have any BRIN bloom indexes, it may be advisable to reindex them after updating. See the third changelog entry below.
\nAlso, if you are upgrading from a version earlier than 15.9, see Section E.11.
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\nWhile unlikely, a SIGSEGV crash could occur if an incomplete multibyte character appeared at the end of memory. This was possible both in the server and in libpq-using applications. (CVE-2025-4207)
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\nTo fix this, you should drop and recreate any self-referential foreign keys on partitioned tables, if partitions have been created or attached since the constraint was created. Bear in mind that violating rows might already be present, in which case recreating the constraint will fail, and you'll need to fix up those rows before trying again.
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The code failed to account for decompression results not being identical to the input objects, which would result in failure to add some of the data to the merged summary, leading to missed rows in index searches.
\nThis mistake was present back to v14 where BRIN bloom indexes were introduced, but this code path was only rarely reached then. It's substantially more likely to be hit in v17 because parallel index builds now use the code.
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Fix MERGE into a partitioned table with DO NOTHING actions (Tender Wang) §
Some cases failed with “unknown action in MERGE WHEN clause” errors.
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Constraint failure was reported even if the generation expression produced a perfectly okay result.
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This patch restores the behavior that existed before PostgreSQL 9.5: the result is of type int2vector[] or oidvector[].
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If a domain type has a default, adding a column of that type (without any explicit DEFAULT clause) failed to install the domain's default value in existing rows, instead leaving the new column null.
Repair misbehavior when there are duplicate column names in a foreign key constraint's ON DELETE SET DEFAULT or SET NULL action (Tom Lane) §
Improve the error message for disallowed attempts to alter the properties of a foreign key constraint (Álvaro Herrera) §
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Fix planner's failure to identify more than one hashable ScalarArrayOpExpr subexpression within a top-level expression (David Geier) §
\nThis resulted in unnecessarily-inefficient execution of any additional subexpressions that could have been processed with a hash table (that is, IN, NOT IN, or = ANY clauses with all-constant right-hand sides).
Disable “skip fetch” optimization in bitmap heap scan (Matthias van de Meent) §
\nIt turns out that this optimization can result in returning dead tuples when a concurrent vacuum marks a page all-visible.
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\nAn indexable clause with many keys (for example, jsonbcol ?| array[...] with tens of thousands of array elements) took O(N2) time to start up, and was uncancelable for that interval too.
Detect missing support procedures in a BRIN index operator class, and report an error instead of crashing (Álvaro Herrera) §
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\nPreviously, nothing would happen until one of the subplans becomes ready.
", "text": "Respond to interrupts (such as query cancel) while waiting for asynchronous subplans of an Append plan node (Heikki Linnakangas) § Previously, nothing would happen until one of the subplans becomes ready.", "title": "Respond to interrupts (such as query cancel) while waiting for asynchronous subplans of an Append plan node", "commits": ["d4d34c08c"], "section": "Changes", "category": "improvement", "source_url": "/docs/release/15.13/#id-1.11.6.12.5", "source_hash": "ca6c901eaf0edc0cfa0fef4da97d3f0f4bc0773b1c011c8ce8c64a107168f7d5", "section_path": ["Changes"], "commit_groups": [["004dbbd72", "af717317a", "d2fb076be", "d4d34c08c", "e731e9d5e"]], "identity_text": "Respond to interrupts (such as query cancel) while waiting for asynchronous subplans of an Append plan node (Heikki Linnakangas) Previously, nothing would happen until one of the subplans becomes ready.", "commit_aliases": ["004dbbd72", "af717317a", "d2fb076be", "d4d34c08c", "e731e9d5e"], "source_commits": ["d4d34c08c"], "source_entry_id": "15.13/changes/018", "db_id": "f65f31a24c7b824da5419e0fce1173eb", "patch_ids": ["c064a1921c86b2d8f990d5d2c678cf3f"], "statement_hash": "f35a3ca56391c5cc0085b028fe9770aec4c6158b8a3e85b4f85a689282d9f1c3", "relations": [{"rule": 2, "type": "equivalent", "target": "266ac90fa5b9b2152af01edeb08fb5b7", "evidence": {"same_day": true, "patch_ids": ["c064a1921c86b2d8f990d5d2c678cf3f"], "statement_hash": "f35a3ca56391c5cc0085b028fe9770aec4c6158b8a3e85b4f85a689282d9f1c3"}}, {"rule": 2, "type": "equivalent", "target": "bc6275afdb9fe4237e597f5a8a0f7d1e", "evidence": {"same_day": true, "patch_ids": ["c064a1921c86b2d8f990d5d2c678cf3f"], "statement_hash": "f35a3ca56391c5cc0085b028fe9770aec4c6158b8a3e85b4f85a689282d9f1c3"}}, {"rule": 2, "type": "equivalent", "target": "f96c8bb00838600eb0266dddb8c5497e", "evidence": {"same_day": true, "patch_ids": ["c064a1921c86b2d8f990d5d2c678cf3f"], "statement_hash": "f35a3ca56391c5cc0085b028fe9770aec4c6158b8a3e85b4f85a689282d9f1c3"}}], "version": "15.13", "category_label": "Improvements", "also_in": [], "variants": [], "related_changes": [{"db_id": "bc6275afdb9fe4237e597f5a8a0f7d1e", "kind": "equivalent", "version": "17.5", "label": "17.5", "title": "Respond to interrupts (such as query cancel) while waiting for asynchronous subplans of an Append plan node", "evidence": {"same_day": true, "patch_ids": ["c064a1921c86b2d8f990d5d2c678cf3f"], "statement_hash": "f35a3ca56391c5cc0085b028fe9770aec4c6158b8a3e85b4f85a689282d9f1c3"}, "url": "/docs/compare/?release=17.5#17.5-3b760fb385f5b7f6", "source_url": "/docs/release/17.5/#RELEASE-17-5-CHANGES"}, {"db_id": "266ac90fa5b9b2152af01edeb08fb5b7", "kind": "equivalent", "version": "16.9", "label": "16.9", "title": "Respond to interrupts (such as query cancel) while waiting for asynchronous subplans of an Append plan node", "evidence": {"same_day": true, "patch_ids": ["c064a1921c86b2d8f990d5d2c678cf3f"], "statement_hash": "f35a3ca56391c5cc0085b028fe9770aec4c6158b8a3e85b4f85a689282d9f1c3"}, "url": "/docs/compare/?release=16.9#16.9-43771120e2df4821", "source_url": "/docs/release/16.9/#RELEASE-16-9-CHANGES"}, {"db_id": "f96c8bb00838600eb0266dddb8c5497e", "kind": "equivalent", "version": "14.18", "label": "14.18", "title": "Respond to interrupts (such as query cancel) while waiting for asynchronous subplans of an Append plan node", "evidence": {"same_day": true, "patch_ids": ["c064a1921c86b2d8f990d5d2c678cf3f"], "statement_hash": "f35a3ca56391c5cc0085b028fe9770aec4c6158b8a3e85b4f85a689282d9f1c3"}, "url": "/docs/compare/?release=14.18#14.18-ebb42881c8090b7d", "source_url": "/docs/release/14.18/#id-1.11.6.12.5"}]}, {"id": "15.13-bcea9256969a7e79", "cves": [], "html": "Fix race condition in handling of synchronous_standby_names immediately after startup (Melnikov Maksim, Michael Paquier) §
For a short period after system startup, backends might fail to wait for synchronous commit even though synchronous_standby_names is enabled.
Fix pg_strtof() to not crash with null endptr (Alexander Lakhin, Tom Lane) §
Avoid crash when a Snowball stemmer encounters an out-of-memory condition (Maksim Korotkov) §
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\nIf the requested recovery timeline is not reachable, the reported checkpoint and timeline should be the values read from the backup_label, if there is one. This message previously reported values from the control file, which is correct when recovering from the control file without a backup_label, but not when there is a backup_label.
", "text": "Fix wrong checkpoint details in error message about incorrect recovery timeline choice (David Steele) § If the requested recovery timeline is not reachable, the reported checkpoint and timeline should be the values read from the backup_label, if there is one. This message previously reported values from the control file, which is correct when recovering from the control file without a backup_label, but not when there is a backup_label.", "title": "Fix wrong checkpoint details in error message about incorrect recovery timeline choice", "commits": ["62bed7bb0"], "section": "Changes", "category": "bugfix", "source_url": "/docs/release/15.13/#id-1.11.6.12.5", "source_hash": "b7dd6a8ea628680c582670d0ac22e704c3e2a590a9ae5c418c5bffd6b40fcc78", "section_path": ["Changes"], "commit_groups": [["29cce279b", "62bed7bb0", "71f17823b", "b4969a296"]], "identity_text": "Fix wrong checkpoint details in error message about incorrect recovery timeline choice (David Steele) If the requested recovery timeline is not reachable, the reported checkpoint and timeline should be the values read from the backup_label, if there is one. This message previously reported values from the control file, which is correct when recovering from the control file without a backup_label, but not when there is a backup_label.", "commit_aliases": ["29cce279b", "62bed7bb0", "71f17823b", "b4969a296"], "source_commits": ["62bed7bb0"], "source_entry_id": "15.13/changes/025", "db_id": "54c2c91919ba0bb07a3b8c1d61f42e31", "patch_ids": ["791e0478918d750ff09e10d599952384"], "statement_hash": "e2dfc107fdae95cf7907303d4f0659f00f9b7c145f7fc3cf16d5b0f4d82af4ff", "relations": [{"rule": 2, "type": "equivalent", "target": "98f7fe84bec7c123507049c72ef3a854", "evidence": {"same_day": true, "patch_ids": ["791e0478918d750ff09e10d599952384"], "statement_hash": "e2dfc107fdae95cf7907303d4f0659f00f9b7c145f7fc3cf16d5b0f4d82af4ff"}}, {"rule": 2, "type": "equivalent", "target": "a246338555d823bc8f689670b84ea7a0", "evidence": {"same_day": true, "patch_ids": ["791e0478918d750ff09e10d599952384"], "statement_hash": "e2dfc107fdae95cf7907303d4f0659f00f9b7c145f7fc3cf16d5b0f4d82af4ff"}}], "version": "15.13", "category_label": "Bug fixes", "also_in": [], "variants": [], "related_changes": [{"db_id": "a246338555d823bc8f689670b84ea7a0", "kind": "equivalent", "version": "17.5", "label": "17.5", "title": "Fix wrong checkpoint details in error message about incorrect recovery timeline choice", "evidence": {"same_day": true, "patch_ids": ["791e0478918d750ff09e10d599952384"], "statement_hash": "e2dfc107fdae95cf7907303d4f0659f00f9b7c145f7fc3cf16d5b0f4d82af4ff"}, "url": "/docs/compare/?release=17.5#17.5-5d0c95873c035713", "source_url": "/docs/release/17.5/#RELEASE-17-5-CHANGES"}, {"db_id": "98f7fe84bec7c123507049c72ef3a854", "kind": "equivalent", "version": "16.9", "label": "16.9", "title": "Fix wrong checkpoint details in error message about incorrect recovery timeline choice", "evidence": {"same_day": true, "patch_ids": ["791e0478918d750ff09e10d599952384"], "statement_hash": "e2dfc107fdae95cf7907303d4f0659f00f9b7c145f7fc3cf16d5b0f4d82af4ff"}, "url": "/docs/compare/?release=16.9#16.9-a1968804eab98396", "source_url": "/docs/release/16.9/#RELEASE-16-9-CHANGES"}]}, {"id": "15.13-b2f3f7b8005b2c50", "cves": [], "html": "Fix assertion failure in snapshot building (Masahiko Sawada) §
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Fix overly-strict assertion in gistFindCorrectParent() (Heikki Linnakangas) §
Fix rare assertion failure in standby servers when the primary is restarted (Heikki Linnakangas) §
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Don't try to drop individual index partitions in pg_dump's --clean mode (Jian He) §
The server rejects such DROP commands. That has no real consequences, since the partitions will go away anyway in the subsequent DROPs of either their parent tables or their partitioned index. However, the error reported for the attempted drop causes problems when restoring in --single-transaction mode.
In pg_dumpall, avoid emitting invalid role GRANT commands if pg_auth_members contains invalid role OIDs (Tom Lane) §
Instead, print a warning and skip the entry. This copes better with catalog corruption that has been seen to occur in back branches as a result of race conditions between GRANT and DROP ROLE.
In pg_amcheck and pg_upgrade, use the correct function to free allocations made by libpq (Michael Paquier, Ranier Vilela) §
\nThese oversights could result in crashes in certain Windows build configurations, such as a debug build of libpq used by a non-debug build of the calling application.
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This change back-patches a v17-era fix. It prevents possible hangs in CREATE DATABASE and DROP DATABASE due to failure to detect deadlocks.
Avoid crashing with corrupt input data in contrib/pageinspect's heap_page_items() (Dmitry Kovalenko) §
Prevent assertion failure in contrib/pg_freespacemap's pg_freespacemap() (Tender Wang) §
Applying pg_freespacemap() to a relation lacking storage (such as a view) caused an assertion failure, although there was no ill effect in non-assert builds. Add an error check to reject that case.
Fix build failure on macOS 15.4 (Tom Lane, Peter Eisentraut) §
\nThis macOS update broke our configuration probe for strchrnul().
Update time zone data files to tzdata release 2025b for DST law changes in Chile, plus historical corrections for Iran (Tom Lane) §
\nThere is a new time zone America/Coyhaique for Chile's Aysén Region, to account for it changing to UTC-03 year-round and thus diverging from America/Santiago.
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