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Fix LookupTupleHashEntryHash() pipeline-stall issue.

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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
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4
src/backend/executor/nodeSetOp.c
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@ -381,7 +381,7 @@ setop_fill_hash_table(SetOpState *setopstate)
/* Find or build hashtable entry for this tuple's group */
entry = LookupTupleHashEntry(setopstate->hashtable, outerslot,
&isnew);
&isnew, NULL);
/* If new tuple group, initialize counts */
if (isnew)
@ -402,7 +402,7 @@ setop_fill_hash_table(SetOpState *setopstate)
/* For tuples not seen previously, do not make hashtable entry */
entry = LookupTupleHashEntry(setopstate->hashtable, outerslot,
NULL);
NULL, NULL);
/* Advance the counts if entry is already present */
if (entry)