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(parent: 62e2809) | patch
Check syscache result in AlterStatistics
authorTomas Vondra <tomas.vondra@postgresql.org>
Sun, 23 Jan 2022 01:49:41 +0000 (02:49 +0100)
committerTomas Vondra <tomas.vondra@postgresql.org>
Sun, 23 Jan 2022 02:16:31 +0000 (03:16 +0100)
commit6d554e3fcd6fb8be2dbcbd3521e2947ed7a552cb
tree1abf76faf083fabb763058782990558743765bcctree
parent62e28097cebf99533bd0badd6f3c6ce9db9f1497commit | diff
Check syscache result in AlterStatistics

The syscache lookup may return NULL even for valid OID, for example due
to a concurrent DROP STATISTICS, so a HeapTupleIsValid is necessary.
Without it, it may fail with a segfault.

Reported by Alexander Lakhin, patch by me. Backpatch to 13, where ALTER
STATISTICS ... SET STATISTICS was introduced.

Backpatch-through: 13
Discussion: https://postgr.es/m/17372-bf3b6e947e35ae77%40postgresql.org
src/backend/commands/statscmds.c diff | blob | blame | history
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