| From: | Tomas Vondra <tomas(dot)vondra(at)postgresql(dot)org> |
|---|---|
| To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | pgsql: Check syscache result in AlterStatistics |
| Date: | 2022-01-23 02:17:36 |
| Message-ID: | E1nBSRk-0007yL-RF@gemulon.postgresql.org |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-committers |
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(+)
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Tomas Vondra | 2022-01-23 02:22:39 | pgsql: Check syscache result in AlterStatistics |
| Previous Message | Tom Lane | 2022-01-22 22:11:40 | pgsql: Remove useless inline marker. |