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ExecReScan for Unique & Sort nodes.

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This commit is contained in:
Vadim B. Mikheev
1998-02-23 06:28:16 +00:00
parent e4fd534645
commit f0e7e2faa4
7 changed files with 83 additions and 11 deletions
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29
src/backend/executor/nodeSort.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/nodeSort.c,v 1.12 1998/01/07 21:02:56 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/nodeSort.c,v 1.13 1998/02/23 06:26:56 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@ -183,8 +183,6 @@ ExecSort(Sort *node)
else
{
slot = (TupleTableSlot *) sortstate->csstate.cstate.cs_ResultTupleSlot;
/* *** get_cs_ResultTupleSlot((CommonState) sortstate); */
/* slot = sortstate->csstate.css_ScanTupleSlot; orig */
}
SO1_printf("ExecSort: %s\n",
@ -390,3 +388,28 @@ ExecSortRestrPos(Sort *node)
*/
psort_restorepos(node);
}
void
ExecReScanSort(Sort *node, ExprContext *exprCtxt, Plan *parent)
{
SortState *sortstate = node->sortstate;
/*
* If we haven't sorted yet, just return. If outerplan'
* chgParam is not NULL then it will be re-scanned by
* ExecProcNode, else - no reason to re-scan it at all.
*/
if (sortstate->sort_Flag == false)
return;
ExecClearTuple(sortstate->csstate.cstate.cs_ResultTupleSlot);
psort_rescan (node);
/*
* If subnode is to be rescanned then we aren't sorted
*/
if (((Plan*) node)->lefttree->chgParam != NULL)
sortstate->sort_Flag = false;
}