diff options
Diffstat (limited to 'src/backend/executor/nodeIndexscan.c')
| -rw-r--r-- | src/backend/executor/nodeIndexscan.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/src/backend/executor/nodeIndexscan.c b/src/backend/executor/nodeIndexscan.c index 37fca4c666c..0ece6c6702f 100644 --- a/src/backend/executor/nodeIndexscan.c +++ b/src/backend/executor/nodeIndexscan.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/executor/nodeIndexscan.c,v 1.87 2003/11/29 19:51:48 pgsql Exp $ + * $PostgreSQL: pgsql/src/backend/executor/nodeIndexscan.c,v 1.88 2003/12/30 20:05:05 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -953,22 +953,28 @@ static void create_duphash(IndexScanState *node) { HASHCTL hash_ctl; + long nbuckets; + node->iss_MaxHash = (SortMem * 1024L) / + (MAXALIGN(sizeof(HASHELEMENT)) + MAXALIGN(sizeof(DupHashTabEntry))); MemSet(&hash_ctl, 0, sizeof(hash_ctl)); hash_ctl.keysize = SizeOfIptrData; hash_ctl.entrysize = sizeof(DupHashTabEntry); hash_ctl.hash = tag_hash; hash_ctl.hcxt = CurrentMemoryContext; + nbuckets = (long) ceil(node->ss.ps.plan->plan_rows); + if (nbuckets < 1) + nbuckets = 1; + if (nbuckets > node->iss_MaxHash) + nbuckets = node->iss_MaxHash; node->iss_DupHash = hash_create("DupHashTable", - (long) ceil(node->ss.ps.plan->plan_rows), + nbuckets, &hash_ctl, HASH_ELEM | HASH_FUNCTION | HASH_CONTEXT); if (node->iss_DupHash == NULL) ereport(ERROR, (errcode(ERRCODE_OUT_OF_MEMORY), errmsg("out of memory"))); - node->iss_MaxHash = (SortMem * 1024L) / - (MAXALIGN(sizeof(HASHELEMENT)) + MAXALIGN(sizeof(DupHashTabEntry))); } int |