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Repair bug #2839: the various ExecReScan functions need to reset
ps_TupFromTlist in plan nodes that make use of it. This was being done correctly in join nodes and Result nodes but not in any relation-scan nodes. Bug would lead to bogus results if a set-returning function appeared in the targetlist of a subquery that could be rescanned after partial execution, for example a subquery within EXISTS(). Bug has been around forever :-( ... surprising it wasn't reported before.
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/executor/nodeFunctionscan.c,v 1.40 2006/06/27 02:51:39 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/executor/nodeFunctionscan.c,v 1.41 2006/12/26 19:26:45 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -317,6 +317,7 @@ void
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ExecFunctionReScan(FunctionScanState *node, ExprContext *exprCtxt)
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{
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ExecClearTuple(node->ss.ps.ps_ResultTupleSlot);
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node->ss.ps.ps_TupFromTlist = false;
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/*
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* If we haven't materialized yet, just return.
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