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Fix LookupTupleHashEntryHash() pipeline-stall issue.

Browse Source 
Refactor hash lookups in nodeAgg.c to improve performance.

Author: Andres Freund and Jeff Davis
Discussion: https://postgr.es/m/20200612213715.op4ye4q7gktqvpuo%40alap3.anarazel.de
Backpatch-through: 13
This commit is contained in:
Jeff Davis
2020-07-26 14:55:52 -07:00
parent 56788d2156
commit 200f6100a9
6 changed files with 107 additions and 103 deletions

4
src/backend/executor/nodeSubplan.c

@ -595,12 +595,12 @@ buildSubPlanHash(SubPlanState *node, ExprContext *econtext)
*/
if (slotNoNulls(slot))
{
(void) LookupTupleHashEntry(node->hashtable, slot, &isnew);
(void) LookupTupleHashEntry(node->hashtable, slot, &isnew, NULL);
node->havehashrows = true;
}
else if (node->hashnulls)
{
(void) LookupTupleHashEntry(node->hashnulls, slot, &isnew);
(void) LookupTupleHashEntry(node->hashnulls, slot, &isnew, NULL);
node->havenullrows = true;
}