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Fix failure of COMMENT command for comments on domain constraints (Daniel Gustafsson, Michael Paquier)
Prevent possible memory clobber when there are duplicate columns in a hash aggregate's hash key list (Andrew Gierth)
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\nThis oversight caused a dump/restore failure for views containing such queries.
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Such cases should produce the literal as a standalone JSON value, but the code misbehaved if the literal contained any characters requiring escaping.
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Such quantifiers were treated as no-ops and optimized away; but the documentation specifies that they impose greediness, or non-greediness in the case of the non-greedy variant {1,1}?, on the subexpression they're attached to, and this did not happen. The misbehavior occurred only if the subexpression contained capturing parentheses or a back-reference.
Avoid writing an invalid empty btree index page in the unlikely case that a failure occurs while processing INCLUDEd columns during a page split (Peter Geoghegan)
\nThe invalid page would not affect normal index operations, but it might cause failures in subsequent VACUUMs. If that has happened to one of your indexes, recover by reindexing the index.
", "text": "Avoid writing an invalid empty btree index page in the unlikely case that a failure occurs while processing INCLUDEd columns during a page split (Peter Geoghegan) The invalid page would not affect normal index operations, but it might cause failures in subsequent VACUUMs. If that has happened to one of your indexes, recover by reindexing the index.", "title": "Avoid writing an invalid empty btree index page in the unlikely case that a failure occurs while processing INCLUDEd columns during a page split", "commits": [], "section": "Changes", "category": "improvement", "source_url": "/docs/release/11.4/#id-1.11.6.23.5", "source_hash": "bc33099d62cb75644fe832a2e861a697bc739abc73d9ad56c1b2094addab737f", "section_path": ["Changes"], "commit_groups": [["9b42e7137", "bf78f50ba"]], "identity_text": "Avoid writing an invalid empty btree index page in the unlikely case that a failure occurs while processing INCLUDEd columns during a page split (Peter Geoghegan) The invalid page would not affect normal index operations, but it might cause failures in subsequent VACUUMs. If that has happened to one of your indexes, recover by reindexing the index.", "commit_aliases": ["9b42e7137", "bf78f50ba"], "source_commits": ["bf78f50ba"], "source_entry_id": "11.4/changes/012", "db_id": "3d397a9e34cff2ff9e96b1c95af4b8ba", "patch_ids": ["d889a8e140c5b01d2e1fb95d1b584588"], "statement_hash": "f8a1c025a824afb2f162c864456f1d262ea235577eeff753c74ab7f864473dca", "relations": [], "version": "11.4", "category_label": "Improvements", "also_in": [], "variants": [], "related_changes": []}, {"id": "11.4-76f825a644b399ef", "cves": [], "html": "Avoid possible failures while initializing a new process's pg_stat_activity data (Tom Lane)
Certain operations that could fail, such as converting strings extracted from an SSL certificate into the database encoding, were being performed inside a critical section. Failure there would result in database-wide lockup due to violating the access protocol for shared pg_stat_activity data.
Fix race condition in check to see whether a pre-existing shared memory segment is still in use by a conflicting postmaster (Tom Lane)
", "text": "Fix race condition in check to see whether a pre-existing shared memory segment is still in use by a conflicting postmaster (Tom Lane)", "title": "Fix race condition in check to see whether a pre-existing shared memory segment is still in use by a conflicting postmaster", "commits": [], "section": "Changes", "category": "bugfix", "source_url": "/docs/release/11.4/#id-1.11.6.23.5", "source_hash": "6b410dc547bb255e33e18eaf615e83fe2390eb910f81b8796832a72dcf253fb8", "section_path": ["Changes"], "commit_groups": [["3dcf45af5", "610747d86", "803f90ab7", "91a05390c", "a73c8caea", "b1cde67a4"]], "identity_text": "Fix race condition in check to see whether a pre-existing shared memory segment is still in use by a conflicting postmaster (Tom Lane)", "commit_aliases": ["3dcf45af5", "610747d86", "803f90ab7", "91a05390c", "a73c8caea", "b1cde67a4"], "source_commits": ["803f90ab7"], "source_entry_id": "11.4/changes/014", "db_id": "9fdc1030c6b13b64ab065e3b76c5248f", "patch_ids": ["7bd7781fee3550eb7607c07befef081a"], "statement_hash": "dd879be66b00ecee021da17e7068e63e61bdac9b9606c0740bb936aaf5bd26da", "relations": [{"rule": 2, "type": "equivalent", "target": "2b65208026195e9279c5a53ceba66228", "evidence": {"same_day": true, "patch_ids": ["7bd7781fee3550eb7607c07befef081a"], "statement_hash": "dd879be66b00ecee021da17e7068e63e61bdac9b9606c0740bb936aaf5bd26da"}}, {"rule": 2, "type": "equivalent", "target": "78c86fc36a8a5f6abd288250eaf289f1", "evidence": {"same_day": true, "patch_ids": ["7bd7781fee3550eb7607c07befef081a"], "statement_hash": "dd879be66b00ecee021da17e7068e63e61bdac9b9606c0740bb936aaf5bd26da"}}, {"rule": 2, "type": "equivalent", "target": "d7fe2a0ebf38ee8098fe1d6d28299d08", "evidence": {"same_day": true, "patch_ids": ["7bd7781fee3550eb7607c07befef081a"], "statement_hash": "dd879be66b00ecee021da17e7068e63e61bdac9b9606c0740bb936aaf5bd26da"}}, {"rule": 2, "type": "equivalent", "target": "ebcf9d6b59071557e6ee1fbdc63e94b6", "evidence": {"same_day": true, "patch_ids": ["7bd7781fee3550eb7607c07befef081a"], "statement_hash": "dd879be66b00ecee021da17e7068e63e61bdac9b9606c0740bb936aaf5bd26da"}}], "version": "11.4", "category_label": "Bug fixes", "also_in": [], "variants": [], "related_changes": [{"db_id": "2b65208026195e9279c5a53ceba66228", "kind": "equivalent", "version": "10.9", "label": "10.9", "title": "Fix race condition in check to see whether a pre-existing shared memory segment is still in use by a conflicting postmaster", "evidence": {"same_day": true, "patch_ids": ["7bd7781fee3550eb7607c07befef081a"], "statement_hash": "dd879be66b00ecee021da17e7068e63e61bdac9b9606c0740bb936aaf5bd26da"}, "url": "/docs/compare/?release=10.9#10.9-c0973e3e278ca076", "source_url": "/docs/release/10.9/#id-1.11.6.19.5"}, {"db_id": "78c86fc36a8a5f6abd288250eaf289f1", "kind": "equivalent", "version": "9.6.14", "label": "9.6.14", "title": "Fix race condition in check to see whether a pre-existing shared memory segment is still in use by a conflicting postmaster", "evidence": {"same_day": true, "patch_ids": ["7bd7781fee3550eb7607c07befef081a"], "statement_hash": "dd879be66b00ecee021da17e7068e63e61bdac9b9606c0740bb936aaf5bd26da"}, "url": "/docs/compare/?release=9.6.14#9.6.14-c0973e3e278ca076", "source_url": "/docs/release/9.6.14/#AEN133626"}, {"db_id": "ebcf9d6b59071557e6ee1fbdc63e94b6", "kind": "equivalent", "version": "9.5.18", "label": "9.5.18", "title": "Fix race condition in check to see whether a pre-existing shared memory segment is still in use by a conflicting postmaster", "evidence": {"same_day": true, "patch_ids": ["7bd7781fee3550eb7607c07befef081a"], "statement_hash": "dd879be66b00ecee021da17e7068e63e61bdac9b9606c0740bb936aaf5bd26da"}, "url": "/docs/compare/?release=9.5.18#9.5.18-c0973e3e278ca076", "source_url": "/docs/release/9.5.18/#AEN128426"}, {"db_id": "d7fe2a0ebf38ee8098fe1d6d28299d08", "kind": "equivalent", "version": "9.4.23", "label": "9.4.23", "title": "Fix race condition in check to see whether a pre-existing shared memory segment is still in use by a conflicting postmaster", "evidence": {"same_day": true, "patch_ids": ["7bd7781fee3550eb7607c07befef081a"], "statement_hash": "dd879be66b00ecee021da17e7068e63e61bdac9b9606c0740bb936aaf5bd26da"}, "url": "/docs/compare/?release=9.4.23#9.4.23-c0973e3e278ca076", "source_url": "/docs/release/9.4.23/#AEN120257"}]}, {"id": "11.4-90dc5449ca7eeea2", "cves": [], "html": "Fix unsafe coding in walreceiver's signal handler (Tom Lane)
\nThis avoids rare problems in which the walreceiver process would crash or deadlock when commanded to shut down.
", "text": "Fix unsafe coding in walreceiver's signal handler (Tom Lane) This avoids rare problems in which the walreceiver process would crash or deadlock when commanded to shut down.", "title": "Fix unsafe coding in walreceiver's signal handler", "commits": [], "section": "Changes", "category": "bugfix", "source_url": "/docs/release/11.4/#id-1.11.6.23.5", "source_hash": "c70c8a4c88477b8e81959dd587bd85ecb8a2e783f5f86fd705e6ab643b04cc95", "section_path": ["Changes"], "commit_groups": [["9346d396f", "a1a789eb5", "ac8f2e1ef"]], "identity_text": "Fix unsafe coding in walreceiver's signal handler (Tom Lane) This avoids rare problems in which the walreceiver process would crash or deadlock when commanded to shut down.", "commit_aliases": ["9346d396f", "a1a789eb5", "ac8f2e1ef"], "source_commits": ["9346d396f"], "source_entry_id": "11.4/changes/015", "db_id": "7dc528f664222144aa28b9edeb5327c6", "patch_ids": ["f2e22964eabc179f95553f6b9059a5ef"], "statement_hash": "4b1430a059dec2f4a9cd3ead915c5cd5c3f3911bf3fab76d21a85f99411f320b", "relations": [{"rule": 2, "type": "equivalent", "target": "9646d246d6c4313f23263b31794387ef", "evidence": {"same_day": true, "patch_ids": ["f2e22964eabc179f95553f6b9059a5ef"], "statement_hash": "4b1430a059dec2f4a9cd3ead915c5cd5c3f3911bf3fab76d21a85f99411f320b"}}], "version": "11.4", "category_label": "Bug fixes", "also_in": [], "variants": [], "related_changes": [{"db_id": "9646d246d6c4313f23263b31794387ef", "kind": "equivalent", "version": "10.9", "label": "10.9", "title": "Fix unsafe coding in walreceiver's signal handler", "evidence": {"same_day": true, "patch_ids": ["f2e22964eabc179f95553f6b9059a5ef"], "statement_hash": "4b1430a059dec2f4a9cd3ead915c5cd5c3f3911bf3fab76d21a85f99411f320b"}, "url": "/docs/compare/?release=10.9#10.9-90dc5449ca7eeea2", "source_url": "/docs/release/10.9/#id-1.11.6.19.5"}]}, {"id": "11.4-be382d6252dd5084", "cves": [], "html": "Avoid attempting to do database accesses for parameter checking in processes that are not connected to a specific database (Vignesh C, Andres Freund)
\nThis error could result in failures like “cannot read pg_class without having selected a database”.
", "text": "Avoid attempting to do database accesses for parameter checking in processes that are not connected to a specific database (Vignesh C, Andres Freund) This error could result in failures like “cannot read pg_class without having selected a database”.", "title": "Avoid attempting to do database accesses for parameter checking in processes that are not connected to a specific database", "commits": [], "section": "Changes", "category": "improvement", "source_url": "/docs/release/11.4/#id-1.11.6.23.5", "source_hash": "cc03b84e150e13131d76dd41ba5f9cffacd7c6a63ab680f2e8b0b2d2bc3bcb77", "section_path": ["Changes"], "commit_groups": [["483b2d7ae", "52ad5fc0a", "69f32206d", "b8607e15e", "c01556017", "fff2a7d7b"]], "identity_text": "Avoid attempting to do database accesses for parameter checking in processes that are not connected to a specific database (Vignesh C, Andres Freund) This error could result in failures like cannot read pg_class without having selected a database.", "commit_aliases": ["483b2d7ae", "52ad5fc0a", "69f32206d", "b8607e15e", "c01556017", "fff2a7d7b"], "source_commits": ["c01556017"], "source_entry_id": "11.4/changes/016", "db_id": "b0a2c3f14f56fa7697ddbdcfd9782707", "patch_ids": ["eb7ca5a3deb1764915b19a4212f1d25e"], "statement_hash": "1a7670883364a8b3a9b3127f168808c3902ef044f9e9a3683497cbacab1e08c7", "relations": [{"rule": 2, "type": "equivalent", "target": "827a6d2e0daa51d02fae5f72e9ed1c60", "evidence": {"same_day": true, "patch_ids": ["eb7ca5a3deb1764915b19a4212f1d25e"], "statement_hash": "1a7670883364a8b3a9b3127f168808c3902ef044f9e9a3683497cbacab1e08c7"}}, {"rule": 2, "type": "equivalent", "target": "8a9e52a1d52618e73a157df3f8bb3bec", "evidence": {"same_day": true, "patch_ids": ["eb7ca5a3deb1764915b19a4212f1d25e"], "statement_hash": "1a7670883364a8b3a9b3127f168808c3902ef044f9e9a3683497cbacab1e08c7"}}, {"rule": 2, "type": "equivalent", "target": "90744f89a54c75c9d18bbda103670c0b", "evidence": {"same_day": true, "patch_ids": ["eb7ca5a3deb1764915b19a4212f1d25e"], "statement_hash": "1a7670883364a8b3a9b3127f168808c3902ef044f9e9a3683497cbacab1e08c7"}}, {"rule": 2, "type": "equivalent", "target": "93eb49d1a9fa05b38f11502f6653af76", "evidence": {"same_day": true, "patch_ids": ["eb7ca5a3deb1764915b19a4212f1d25e"], "statement_hash": "1a7670883364a8b3a9b3127f168808c3902ef044f9e9a3683497cbacab1e08c7"}}], "version": "11.4", "category_label": "Improvements", "also_in": [], "variants": [], "related_changes": [{"db_id": "8a9e52a1d52618e73a157df3f8bb3bec", "kind": "equivalent", "version": "10.9", "label": "10.9", "title": "Avoid attempting to do database accesses for parameter checking in processes that are not connected to a specific database", "evidence": {"same_day": true, "patch_ids": ["eb7ca5a3deb1764915b19a4212f1d25e"], "statement_hash": "1a7670883364a8b3a9b3127f168808c3902ef044f9e9a3683497cbacab1e08c7"}, "url": "/docs/compare/?release=10.9#10.9-be382d6252dd5084", "source_url": "/docs/release/10.9/#id-1.11.6.19.5"}, {"db_id": "93eb49d1a9fa05b38f11502f6653af76", "kind": "equivalent", "version": "9.6.14", "label": "9.6.14", "title": "Avoid attempting to do database accesses for parameter checking in processes that are not connected to a specific database", "evidence": {"same_day": true, "patch_ids": ["eb7ca5a3deb1764915b19a4212f1d25e"], "statement_hash": "1a7670883364a8b3a9b3127f168808c3902ef044f9e9a3683497cbacab1e08c7"}, "url": "/docs/compare/?release=9.6.14#9.6.14-be382d6252dd5084", "source_url": "/docs/release/9.6.14/#AEN133626"}, {"db_id": "90744f89a54c75c9d18bbda103670c0b", "kind": "equivalent", "version": "9.5.18", "label": "9.5.18", "title": "Avoid attempting to do database accesses for parameter checking in processes that are not connected to a specific database", "evidence": {"same_day": true, "patch_ids": ["eb7ca5a3deb1764915b19a4212f1d25e"], "statement_hash": "1a7670883364a8b3a9b3127f168808c3902ef044f9e9a3683497cbacab1e08c7"}, "url": "/docs/compare/?release=9.5.18#9.5.18-be382d6252dd5084", "source_url": "/docs/release/9.5.18/#AEN128426"}, {"db_id": "827a6d2e0daa51d02fae5f72e9ed1c60", "kind": "equivalent", "version": "9.4.23", "label": "9.4.23", "title": "Avoid attempting to do database accesses for parameter checking in processes that are not connected to a specific database", "evidence": {"same_day": true, "patch_ids": ["eb7ca5a3deb1764915b19a4212f1d25e"], "statement_hash": "1a7670883364a8b3a9b3127f168808c3902ef044f9e9a3683497cbacab1e08c7"}, "url": "/docs/compare/?release=9.4.23#9.4.23-be382d6252dd5084", "source_url": "/docs/release/9.4.23/#AEN120257"}]}, {"id": "11.4-67f1f3f9da9a2674", "cves": [], "html": "Avoid possible hang in libpq if using SSL and OpenSSL's pending-data buffer contains an exact multiple of 256 bytes (David Binderman)
", "text": "Avoid possible hang in libpq if using SSL and OpenSSL's pending-data buffer contains an exact multiple of 256 bytes (David Binderman)", "title": "Avoid possible hang in libpq if using SSL and OpenSSL's pending-data buffer contains an exact multiple of 256 bytes", "commits": [], "section": "Changes", "category": "bugfix", "source_url": "/docs/release/11.4/#id-1.11.6.23.5", "source_hash": "10f72050c28b6fbdaea74574e2b1389281e6dbc3e54cb5d9ad410d4fc802005c", "section_path": ["Changes"], "commit_groups": [["0ec3d2ab2", "6b0e9411f", "8eaba0b93", "ddf927fb1", "e3bf3c0f8"]], "identity_text": "Avoid possible hang in libpq if using SSL and OpenSSL's pending-data buffer contains an exact multiple of 256 bytes (David Binderman)", "commit_aliases": ["0ec3d2ab2", "6b0e9411f", "8eaba0b93", "ddf927fb1", "e3bf3c0f8"], "source_commits": ["6b0e9411f"], "source_entry_id": "11.4/changes/017", "db_id": "070be28dd028f1fa3df358e99ae6bb1e", "patch_ids": ["0ddf689374641b24ad9b32c07a6d3b25"], "statement_hash": "5b71b4978f6a2e1c17c50d9d6ced5eb2c62a34a8526033fd5b36f7dabc1fe80e", "relations": [{"rule": 2, "type": "equivalent", "target": "15e672bae169e5cd252f630b18a1d999", "evidence": {"same_day": true, "patch_ids": ["0ddf689374641b24ad9b32c07a6d3b25"], "statement_hash": "5b71b4978f6a2e1c17c50d9d6ced5eb2c62a34a8526033fd5b36f7dabc1fe80e"}}, {"rule": 2, "type": "equivalent", "target": "79f9916a73bfa81f171c0fe62097cf42", "evidence": {"same_day": true, "patch_ids": ["0ddf689374641b24ad9b32c07a6d3b25"], "statement_hash": "5b71b4978f6a2e1c17c50d9d6ced5eb2c62a34a8526033fd5b36f7dabc1fe80e"}}, {"rule": 2, "type": "equivalent", "target": "9d356c18f9d74f27357cb54c80b03d74", "evidence": {"same_day": true, "patch_ids": ["0ddf689374641b24ad9b32c07a6d3b25"], "statement_hash": "5b71b4978f6a2e1c17c50d9d6ced5eb2c62a34a8526033fd5b36f7dabc1fe80e"}}], "version": "11.4", "category_label": "Bug fixes", "also_in": [], "variants": [], "related_changes": [{"db_id": "79f9916a73bfa81f171c0fe62097cf42", "kind": "equivalent", "version": "10.9", "label": "10.9", "title": "Avoid possible hang in libpq if using SSL and OpenSSL's pending-data buffer contains an exact multiple of 256 bytes", "evidence": {"same_day": true, "patch_ids": ["0ddf689374641b24ad9b32c07a6d3b25"], "statement_hash": "5b71b4978f6a2e1c17c50d9d6ced5eb2c62a34a8526033fd5b36f7dabc1fe80e"}, "url": "/docs/compare/?release=10.9#10.9-67f1f3f9da9a2674", "source_url": "/docs/release/10.9/#id-1.11.6.19.5"}, {"db_id": "15e672bae169e5cd252f630b18a1d999", "kind": "equivalent", "version": "9.6.14", "label": "9.6.14", "title": "Avoid possible hang in libpq if using SSL and OpenSSL's pending-data buffer contains an exact multiple of 256 bytes", "evidence": {"same_day": true, "patch_ids": ["0ddf689374641b24ad9b32c07a6d3b25"], "statement_hash": "5b71b4978f6a2e1c17c50d9d6ced5eb2c62a34a8526033fd5b36f7dabc1fe80e"}, "url": "/docs/compare/?release=9.6.14#9.6.14-67f1f3f9da9a2674", "source_url": "/docs/release/9.6.14/#AEN133626"}, {"db_id": "9d356c18f9d74f27357cb54c80b03d74", "kind": "equivalent", "version": "9.5.18", "label": "9.5.18", "title": "Avoid possible hang in libpq if using SSL and OpenSSL's pending-data buffer contains an exact multiple of 256 bytes", "evidence": {"same_day": true, "patch_ids": ["0ddf689374641b24ad9b32c07a6d3b25"], "statement_hash": "5b71b4978f6a2e1c17c50d9d6ced5eb2c62a34a8526033fd5b36f7dabc1fe80e"}, "url": "/docs/compare/?release=9.5.18#9.5.18-67f1f3f9da9a2674", "source_url": "/docs/release/9.5.18/#AEN128426"}]}, {"id": "11.4-d3315b83db12d0f7", "cves": [], "html": "Improve initdb's handling of multiple equivalent names for the system time zone (Tom Lane, Andrew Gierth)
\nMake initdb examine the /etc/localtime symbolic link, if that exists, to break ties between equivalent names for the system time zone. This makes initdb more likely to select the time zone name that the user would expect when multiple identical time zones exist. It will not change the behavior if /etc/localtime is not a symlink to a zone data file, nor if the time zone is determined from the TZ environment variable.
Separately, prefer UTC over other spellings of that time zone, when neither TZ nor /etc/localtime provide a hint. This fixes an annoyance introduced by tzdata 2019a's change to make the UCT and UTC zone names equivalent: initdb was then preferring UCT, which almost nobody wants.
Fix ordering of GRANT commands emitted by pg_dump and pg_dumpall for databases and tablespaces (Nathan Bossart, Michael Paquier)
If cascading grants had been issued, restore might fail due to the GRANT commands being given in an order that didn't respect their interdependencies.
Make pg_dump recreate table partitions using CREATE TABLE then ATTACH PARTITION, rather than including PARTITION OF in the creation command (Álvaro Herrera, David Rowley)
This avoids problems with the partition's column order possibly being changed to match the parent's. Also, a partition is now restorable from the dump (as a standalone table) even if its parent table isn't restored; the ATTACH will fail, but that can just be ignored.
Fix misleading error reports from reindexdb (Julien Rouhaud)
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Also, fix an off-by-one error that resulted in not necessarily logging every query even when the sampling rate is set to 1.0.
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