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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2022-08-13 16:59:58 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2022-08-13 16:59:58 -0400 |
| commit | 4878ea717c7166e3453cb94796a2044837bf1d2b (patch) | |
| tree | d0f25115375f52501541d504bb6259f6c063f226 /src/backend/executor/execReplication.c | |
| parent | 60f876317efc7b9ad624b11ae2f4b8208e408ef4 (diff) | |
| download | postgresql-4878ea717c7166e3453cb94796a2044837bf1d2b.tar.gz postgresql-4878ea717c7166e3453cb94796a2044837bf1d2b.zip | |
Avoid misbehavior when hash_table_bytes < bucket_size.
It's possible to reach this case when work_mem is very small and tupsize
is (relatively) very large. In that case ExecChooseHashTableSize would
get an assertion failure, or with asserts off it'd compute nbuckets = 0,
which'd likely cause misbehavior later (I've not checked). To fix,
clamp the number of buckets to be at least 1.
This is due to faulty conversion of old my_log2() coding in 28d936031.
Back-patch to v13, as that was.
Zhang Mingli
Discussion: https://postgr.es/m/beb64ca0-91e2-44ac-bf4a-7ea36275ec02@Spark
Diffstat (limited to 'src/backend/executor/execReplication.c')
0 files changed, 0 insertions, 0 deletions