A dump/restore is not required for those running 9.6.X.
\nHowever, if you use the adminpack extension, you should update it as per the first changelog entry below.
\nAlso, if the function marking mistakes mentioned in the second and third changelog entries below affect you, you will want to take steps to correct your database catalogs.
\nAlso, if you are upgrading from a version earlier than 9.6.8, see Section E.17.
", "compatibility_count": 0, "label": "9.6.9", "status_label": "Historical", "eol": "2021-11-11", "age_days": 3064, "support_days": -1783}, "groups": [{"date": "2018-05-10", "build": "9.6.9", "major": "9.6", "minor": 9, "manual": "9.6", "status": "stable", "doc_git": "", "version": "9.6.9", "eol_date": "2021-11-11", "date_text": "2018-05-10", "supported": false, "manual_url": "/docs/9.6/release-9-6-9.html", "source_url": "/docs/release/9.6.9/", "entry_count": 43, "placeholder": false, "content_hash": "1fd14bd8bfd6e4ed52cc9f274494458237967c25a13a719e945bdeeb143d6591", "manual_build": "9.6.24", "source_as_of": "", "changes_count": 43, "doc_loaded_at": "2026-09-25T02:22:44.760693", "migration_html": "A dump/restore is not required for those running 9.6.X.
\nHowever, if you use the adminpack extension, you should update it as per the first changelog entry below.
\nAlso, if the function marking mistakes mentioned in the second and third changelog entries below affect you, you will want to take steps to correct your database catalogs.
\nAlso, if you are upgrading from a version earlier than 9.6.8, see Section E.17.
", "compatibility_count": 0, "label": "9.6.9", "status_label": "Historical", "eol": "2021-11-11", "age_days": 3064, "support_days": -1783, "entries": [{"id": "9.6.9-3da95ecc3e828f89", "cves": ["CVE-2018-1115"], "html": "Remove public execute privilege from contrib/adminpack's pg_logfile_rotate() function (Stephen Frost)
pg_logfile_rotate() is a deprecated wrapper for the core function pg_rotate_logfile(). When that function was changed to rely on SQL privileges for access control rather than a hard-coded superuser check, pg_logfile_rotate() should have been updated as well, but the need for this was missed. Hence, if adminpack is installed, any user could request a logfile rotation, creating a minor security issue.
After installing this update, administrators should update adminpack by performing ALTER EXTENSION adminpack UPDATE in each database in which adminpack is installed. (CVE-2018-1115)
", "text": "Remove public execute privilege from contrib/adminpack's pg_logfile_rotate() function (Stephen Frost) pg_logfile_rotate() is a deprecated wrapper for the core function pg_rotate_logfile(). When that function was changed to rely on SQL privileges for access control rather than a hard-coded superuser check, pg_logfile_rotate() should have been updated as well, but the need for this was missed. Hence, if adminpack is installed, any user could request a logfile rotation, creating a minor security issue. After installing this update, administrators should update adminpack by performing ALTER EXTENSION adminpack UPDATE in each database in which adminpack is installed. (CVE-2018-1115)", "title": "Remove public execute privilege from contrib/adminpack's pg_logfile_rotate() function", "commits": [], "section": "Changes", "category": "security", "source_url": "/docs/release/9.6.9/#AEN134496", "source_hash": "3f44ee1528b4376b23fcb6e9d87a5f284bf7132022f5d3010f95b2b053ef6a11", "section_path": ["Changes"], "commit_groups": [], "identity_text": "Remove public execute privilege from contrib/adminpack's pg_logfile_rotate() function (Stephen Frost) pg_logfile_rotate() is a deprecated wrapper for the core function pg_rotate_logfile(). When that function was changed to rely on SQL privileges for access control rather than a hard-coded superuser check, pg_logfile_rotate() should have been updated as well, but the need for this was missed. Hence, if adminpack is installed, any user could request a logfile rotation, creating a minor security issue. After installing this update, administrators should update adminpack by performing ALTER EXTENSION adminpack UPDATE in each database in which adminpack is installed. (CVE-2018-1115)", "commit_aliases": [], "source_commits": [], "source_entry_id": "9.6.9/changes/001", "db_id": "3b614dbfc79d425c587fd768b20b393d", "patch_ids": [], "statement_hash": "712f4f58dc3ea1094b64a653a1d9e436db51f07641cfcdbe625ac9aea5d16df5", "relations": [{"rule": 2, "type": "equivalent", "target": "80ebe5c1773e98378ec6eead218154c5", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "712f4f58dc3ea1094b64a653a1d9e436db51f07641cfcdbe625ac9aea5d16df5"}}], "version": "9.6.9", "category_label": "Security", "also_in": [], "variants": [], "related_changes": [{"db_id": "80ebe5c1773e98378ec6eead218154c5", "kind": "equivalent", "version": "10.4", "label": "10.4", "title": "Remove public execute privilege from contrib/adminpack's pg_logfile_rotate() function", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "712f4f58dc3ea1094b64a653a1d9e436db51f07641cfcdbe625ac9aea5d16df5"}, "url": "/docs/compare/?release=10.4#10.4-3da95ecc3e828f89", "source_url": "/docs/release/10.4/#id-1.11.6.24.5"}]}, {"id": "9.6.9-d69dd3296f3254e9", "cves": [], "html": "Fix incorrect volatility markings on a few built-in functions (Thomas Munro, Tom Lane)
\nThe functions query_to_xml, cursor_to_xml, cursor_to_xmlschema, query_to_xmlschema, and query_to_xml_and_xmlschema should be marked volatile because they execute user-supplied queries that might contain volatile operations. They were not, leading to a risk of incorrect query optimization. This has been repaired for new installations by correcting the initial catalog data, but existing installations will continue to contain the incorrect markings. Practical use of these functions seems to pose little hazard, but in case of trouble, it can be fixed by manually updating these functions' pg_proc entries, for example ALTER FUNCTION pg_catalog.query_to_xml(text, boolean, boolean, text) VOLATILE. (Note that that will need to be done in each database of the installation.) Another option is to pg_upgrade the database to a version containing the corrected initial data.
Fix incorrect parallel-safety markings on a few built-in functions (Thomas Munro, Tom Lane)
\nThe functions brin_summarize_new_values, gin_clean_pending_list, cursor_to_xml, cursor_to_xmlschema, ts_rewrite, ts_stat, and binary_upgrade_create_empty_extension should be marked parallel-unsafe; some because they perform database modifications directly, and others because they execute user-supplied queries that might do so. They were marked parallel-restricted instead, leading to a risk of unexpected query errors. This has been repaired for new installations by correcting the initial catalog data, but existing installations will continue to contain the incorrect markings. Practical use of these functions seems to pose little hazard unless force_parallel_mode is turned on. In case of trouble, it can be fixed by manually updating these functions' pg_proc entries, for example ALTER FUNCTION pg_catalog.brin_summarize_new_values(regclass) PARALLEL UNSAFE. (Note that that will need to be done in each database of the installation.) Another option is to pg_upgrade the database to a version containing the corrected initial data.
Avoid re-using TOAST value OIDs that match dead-but-not-yet-vacuumed TOAST entries (Pavan Deolasee)
\nOnce the OID counter has wrapped around, it's possible to assign a TOAST value whose OID matches a previously deleted entry in the same TOAST table. If that entry were not yet vacuumed away, this resulted in \"unexpected chunk number 0 (expected 1) for toast value nnnnn\" errors, which would persist until the dead entry was removed by VACUUM. Fix by not selecting such OIDs when creating a new TOAST entry.
", "text": "Avoid re-using TOAST value OIDs that match dead-but-not-yet-vacuumed TOAST entries (Pavan Deolasee) Once the OID counter has wrapped around, it's possible to assign a TOAST value whose OID matches a previously deleted entry in the same TOAST table. If that entry were not yet vacuumed away, this resulted in \"unexpected chunk number 0 (expected 1) for toast value nnnnn\" errors, which would persist until the dead entry was removed by VACUUM. Fix by not selecting such OIDs when creating a new TOAST entry.", "title": "Avoid re-using TOAST value OIDs that match dead-but-not-yet-vacuumed TOAST entries", "commits": [], "section": "Changes", "category": "improvement", "source_url": "/docs/release/9.6.9/#AEN134496", "source_hash": "d05641636bce96e46895a854d51f8c25480af75082a92ce242f2d1f0a39e7801", "section_path": ["Changes"], "commit_groups": [], "identity_text": "Avoid re-using TOAST value OIDs that match dead-but-not-yet-vacuumed TOAST entries (Pavan Deolasee) Once the OID counter has wrapped around, it's possible to assign a TOAST value whose OID matches a previously deleted entry in the same TOAST table. If that entry were not yet vacuumed away, this resulted in unexpected chunk number 0 (expected 1) for toast value nnnnn errors, which would persist until the dead entry was removed by VACUUM. Fix by not selecting such OIDs when creating a new TOAST entry.", "commit_aliases": [], "source_commits": [], "source_entry_id": "9.6.9/changes/004", "db_id": "4035d185e648f4a1a98665cfb8f9342c", "patch_ids": [], "statement_hash": "41071cbd7b24941a80f90ae00e8631a89cce2cdc34545f79240e099448269380", "relations": [{"rule": 2, "type": "equivalent", "target": "6880622ffcd47407c39b65ab10c581e1", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "41071cbd7b24941a80f90ae00e8631a89cce2cdc34545f79240e099448269380"}}, {"rule": 2, "type": "equivalent", "target": "862469b6786f98380f5d936984d0d58d", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "41071cbd7b24941a80f90ae00e8631a89cce2cdc34545f79240e099448269380"}}, {"rule": 2, "type": "equivalent", "target": "87f78c7f9303d4e8f2177bdb76e23f66", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "41071cbd7b24941a80f90ae00e8631a89cce2cdc34545f79240e099448269380"}}, {"rule": 2, "type": "equivalent", "target": "e392178093fe6d0921ffb62054aa789b", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "41071cbd7b24941a80f90ae00e8631a89cce2cdc34545f79240e099448269380"}}], "version": "9.6.9", "category_label": "Improvements", "also_in": [], "variants": [], "related_changes": [{"db_id": "e392178093fe6d0921ffb62054aa789b", "kind": "equivalent", "version": "10.4", "label": "10.4", "title": "Avoid re-using TOAST value OIDs that match dead-but-not-yet-vacuumed TOAST entries", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "41071cbd7b24941a80f90ae00e8631a89cce2cdc34545f79240e099448269380"}, "url": "/docs/compare/?release=10.4#10.4-2e9ceb7faf49d36e", "source_url": "/docs/release/10.4/#id-1.11.6.24.5"}, {"db_id": "6880622ffcd47407c39b65ab10c581e1", "kind": "equivalent", "version": "9.5.13", "label": "9.5.13", "title": "Avoid re-using TOAST value OIDs that match dead-but-not-yet-vacuumed TOAST entries", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "41071cbd7b24941a80f90ae00e8631a89cce2cdc34545f79240e099448269380"}, "url": "/docs/compare/?release=9.5.13#9.5.13-2e9ceb7faf49d36e", "source_url": "/docs/release/9.5.13/#AEN129230"}, {"db_id": "87f78c7f9303d4e8f2177bdb76e23f66", "kind": "equivalent", "version": "9.4.18", "label": "9.4.18", "title": "Avoid re-using TOAST value OIDs that match dead-but-not-yet-vacuumed TOAST entries", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "41071cbd7b24941a80f90ae00e8631a89cce2cdc34545f79240e099448269380"}, "url": "/docs/compare/?release=9.4.18#9.4.18-2e9ceb7faf49d36e", "source_url": "/docs/release/9.4.18/#AEN120949"}, {"db_id": "862469b6786f98380f5d936984d0d58d", "kind": "equivalent", "version": "9.3.23", "label": "9.3.23", "title": "Avoid re-using TOAST value OIDs that match dead-but-not-yet-vacuumed TOAST entries", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "41071cbd7b24941a80f90ae00e8631a89cce2cdc34545f79240e099448269380"}, "url": "/docs/compare/?release=9.3.23#9.3.23-2e9ceb7faf49d36e", "source_url": "/docs/release/9.3.23/#AEN115427"}]}, {"id": "9.6.9-5dea6d3282166bc5", "cves": [], "html": "Change ANALYZE's algorithm for updating pg_class.reltuples (David Gould)
\nPreviously, pages not actually scanned by ANALYZE were assumed to retain their old tuple density. In a large table where ANALYZE samples only a small fraction of the pages, this meant that the overall tuple density estimate could not change very much, so that reltuples would change nearly proportionally to changes in the table's physical size (relpages) regardless of what was actually happening in the table. This has been observed to result in reltuples becoming so much larger than reality as to effectively shut off autovacuuming. To fix, assume that ANALYZE's sample is a statistically unbiased sample of the table (as it should be), and just extrapolate the density observed within those pages to the whole table.
", "text": "Change ANALYZE's algorithm for updating pg_class.reltuples (David Gould) Previously, pages not actually scanned by ANALYZE were assumed to retain their old tuple density. In a large table where ANALYZE samples only a small fraction of the pages, this meant that the overall tuple density estimate could not change very much, so that reltuples would change nearly proportionally to changes in the table's physical size (relpages) regardless of what was actually happening in the table. This has been observed to result in reltuples becoming so much larger than reality as to effectively shut off autovacuuming. To fix, assume that ANALYZE's sample is a statistically unbiased sample of the table (as it should be), and just extrapolate the density observed within those pages to the whole table.", "title": "Change ANALYZE's algorithm for updating pg_class.reltuples", "commits": [], "section": "Changes", "category": "improvement", "source_url": "/docs/release/9.6.9/#AEN134496", "source_hash": "17141ed953dc3156ee460c4a49239020017883c218f472673493d5aff17814dc", "section_path": ["Changes"], "commit_groups": [], "identity_text": "Change ANALYZE's algorithm for updating pg_class.reltuples (David Gould) Previously, pages not actually scanned by ANALYZE were assumed to retain their old tuple density. In a large table where ANALYZE samples only a small fraction of the pages, this meant that the overall tuple density estimate could not change very much, so that reltuples would change nearly proportionally to changes in the table's physical size (relpages) regardless of what was actually happening in the table. This has been observed to result in reltuples becoming so much larger than reality as to effectively shut off autovacuuming. 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", "text": "Avoid deadlocks in concurrent CREATE INDEX CONCURRENTLY commands that are run under SERIALIZABLE or REPEATABLE READ transaction isolation (Tom Lane)", "title": "Avoid deadlocks in concurrent CREATE INDEX CONCURRENTLY commands that are run under SERIALIZABLE or REPEATABLE READ transaction isolation", "commits": [], "section": "Changes", "category": "bugfix", "source_url": "/docs/release/9.6.9/#AEN134496", "source_hash": "1f840f6180a2bf58b76955340c708259db99c10b8d64768dd3c1c5f47bf7bf13", "section_path": ["Changes"], "commit_groups": [], "identity_text": "Avoid deadlocks in concurrent CREATE INDEX CONCURRENTLY commands that are run under SERIALIZABLE or REPEATABLE READ transaction isolation (Tom Lane)", "commit_aliases": [], "source_commits": [], "source_entry_id": "9.6.9/changes/006", "db_id": "9d82a4f873bce505f63f2ef3c5270503", "patch_ids": [], "statement_hash": "21ba85c192f8e7aef47763976074fb88ac7afbb31e5ab0c0ab8477104ce277fe", "relations": [{"rule": 2, "type": "equivalent", "target": "191769a0661f7d949b324009d138f340", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "21ba85c192f8e7aef47763976074fb88ac7afbb31e5ab0c0ab8477104ce277fe"}}, {"rule": 2, "type": "equivalent", "target": "1dd46aade8b4ab20cf5381f9a17a609c", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "21ba85c192f8e7aef47763976074fb88ac7afbb31e5ab0c0ab8477104ce277fe"}}, {"rule": 2, "type": "equivalent", "target": "aad884265a80122f34b9b9684b3f4cfe", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "21ba85c192f8e7aef47763976074fb88ac7afbb31e5ab0c0ab8477104ce277fe"}}], "version": "9.6.9", "category_label": "Bug fixes", "also_in": [], "variants": [], "related_changes": [{"db_id": "aad884265a80122f34b9b9684b3f4cfe", "kind": "equivalent", "version": "10.4", "label": "10.4", "title": "Avoid deadlocks in concurrent CREATE INDEX CONCURRENTLY commands that are run under SERIALIZABLE or REPEATABLE READ transaction isolation", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "21ba85c192f8e7aef47763976074fb88ac7afbb31e5ab0c0ab8477104ce277fe"}, "url": "/docs/compare/?release=10.4#10.4-89c9b69f91335f3f", "source_url": "/docs/release/10.4/#id-1.11.6.24.5"}, {"db_id": "191769a0661f7d949b324009d138f340", "kind": "equivalent", "version": "9.5.13", "label": "9.5.13", "title": "Avoid deadlocks in concurrent CREATE INDEX CONCURRENTLY commands that are run under SERIALIZABLE or REPEATABLE READ transaction isolation", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "21ba85c192f8e7aef47763976074fb88ac7afbb31e5ab0c0ab8477104ce277fe"}, "url": "/docs/compare/?release=9.5.13#9.5.13-89c9b69f91335f3f", "source_url": "/docs/release/9.5.13/#AEN129230"}, {"db_id": "1dd46aade8b4ab20cf5381f9a17a609c", "kind": "equivalent", "version": "9.4.18", "label": "9.4.18", "title": "Avoid deadlocks in concurrent CREATE INDEX CONCURRENTLY commands that are run under SERIALIZABLE or REPEATABLE READ transaction isolation", "evidence": {"same_day": true, "patch_ids": [], "statement_hash": "21ba85c192f8e7aef47763976074fb88ac7afbb31e5ab0c0ab8477104ce277fe"}, "url": "/docs/compare/?release=9.4.18#9.4.18-89c9b69f91335f3f", "source_url": "/docs/release/9.4.18/#AEN120949"}]}, {"id": "9.6.9-346358bbf5b80085", "cves": [], "html": "Fix possible slow execution of REFRESH MATERIALIZED VIEW CONCURRENTLY (Thomas Munro)
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\nThis could, for example, allow constraint exclusion to exclude a child table that should not be excluded from a query.
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