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Diffstat (limited to 'src/backend/executor/nodeSubplan.c')
| -rw-r--r-- | src/backend/executor/nodeSubplan.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/backend/executor/nodeSubplan.c b/src/backend/executor/nodeSubplan.c index f26c883c67d..bb4a0219194 100644 --- a/src/backend/executor/nodeSubplan.c +++ b/src/backend/executor/nodeSubplan.c @@ -519,6 +519,11 @@ buildSubPlanHash(SubPlanState *node, ExprContext *econtext) * * If it's not necessary to distinguish FALSE and UNKNOWN, then we don't * need to store subplan output rows that contain NULL. + * + * Because the input slot for each hash table is always the slot resulting + * from an ExecProject(), we can use TTSOpsVirtual for the input ops. This + * saves a needless fetch inner op step for the hashing ExprState created + * in BuildTupleHashTableExt(). */ MemoryContextReset(node->hashtablecxt); node->havehashrows = false; @@ -533,6 +538,7 @@ buildSubPlanHash(SubPlanState *node, ExprContext *econtext) else node->hashtable = BuildTupleHashTableExt(node->parent, node->descRight, + &TTSOpsVirtual, ncols, node->keyColIdx, node->tab_eq_funcoids, @@ -561,6 +567,7 @@ buildSubPlanHash(SubPlanState *node, ExprContext *econtext) else node->hashnulls = BuildTupleHashTableExt(node->parent, node->descRight, + &TTSOpsVirtual, ncols, node->keyColIdx, node->tab_eq_funcoids, |