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Create a new 'MultiExecProcNode' call API for plan nodes that don't

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return just a single tuple at a time.  Currently the only such node
type is Hash, but I expect we will soon have indexscans that can return
tuple bitmaps.  A side benefit is that EXPLAIN ANALYZE now shows the
correct tuple count for a Hash node.
This commit is contained in:
Tom Lane
2005-04-16 20:07:35 +00:00
parent 85eee28cec
commit d8b1bf4791
9 changed files with 121 additions and 39 deletions
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6
src/backend/executor/nodeHashjoin.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/executor/nodeHashjoin.c,v 1.70 2005/03/31 02:02:52 neilc Exp $
* $PostgreSQL: pgsql/src/backend/executor/nodeHashjoin.c,v 1.71 2005/04/16 20:07:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -123,13 +123,13 @@ ExecHashJoin(HashJoinState *node)
* execute the Hash node, to build the hash table
*/
hashNode->hashtable = hashtable;
(void) ExecProcNode((PlanState *) hashNode);
(void) MultiExecProcNode((PlanState *) hashNode);
/*
* If the inner relation is completely empty, and we're not doing
* an outer join, we can quit without scanning the outer relation.
*/
if (!hashtable->hashNonEmpty && node->js.jointype != JOIN_LEFT)
if (hashtable->totalTuples == 0 && node->js.jointype != JOIN_LEFT)
{
ExecHashTableDestroy(hashtable);
node->hj_HashTable = NULL;