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Replace the array-style TupleTable data structure with a simple List of

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TupleTableSlot nodes.  This eliminates the need to count in advance
how many Slots will be needed, which seems more than worth the small
increase in the amount of palloc traffic during executor startup.

The ExecCountSlots infrastructure is now all dead code, but I'll remove it
in a separate commit for clarity.

Per a comment from Robert Haas.
This commit is contained in:
Tom Lane
2009-09-27 20:09:58 +00:00
parent 61be11ff08
commit f92e8a4b5e
6 changed files with 135 additions and 254 deletions
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4
src/backend/executor/execUtils.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/executor/execUtils.c,v 1.161 2009/07/29 20:56:18 tgl Exp $
* $PostgreSQL: pgsql/src/backend/executor/execUtils.c,v 1.162 2009/09/27 20:09:57 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -197,7 +197,7 @@ CreateExecutorState(void)
estate->es_query_cxt = qcontext;
estate->es_tupleTable = NULL;
estate->es_tupleTable = NIL;
estate->es_processed = 0;
estate->es_lastoid = InvalidOid;