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 Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/6d554e3fcd6fb8be2dbcbd3521e2947ed7a552cb Modified Files -------------- src/backend/commands/statscmds.c | 2 ++ 1 file changed, 2 insertions(+)
