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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 17:00:32 -0400 |
| commit | 55d9cd46f65a5fc0c3bbb69d36cc9dba597a8c9c (patch) | |
| tree | 7c79606984cfcc760d3e69af32b7f0c6363b2cdf /src/backend/libpq/auth.c | |
| parent | f5580882856963d1b50f9e391a8dda82d44b69a6 (diff) | |
| download | postgresql-55d9cd46f65a5fc0c3bbb69d36cc9dba597a8c9c.tar.gz postgresql-55d9cd46f65a5fc0c3bbb69d36cc9dba597a8c9c.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/libpq/auth.c')
0 files changed, 0 insertions, 0 deletions