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 Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/55d9cd46f65a5fc0c3bbb69d36cc9dba597a8c9c Modified Files -------------- src/backend/executor/nodeHash.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
