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Reset per-tuple memory context between every row in a scan node, even when

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there's no quals or projections. Currently this only matters for foreign
scans, as none of the other scan nodes litter the per-tuple memory context
when there's no quals or projections.
This commit is contained in:
Heikki Linnakangas 2011-05-21 14:30:11 -04:00
parent 27c7875d95
commit 0319da638f
1 changed files with 4 additions and 1 deletions
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5
src/backend/executor/execScan.c
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@ -120,13 +120,17 @@ ExecScan(ScanState *node,
*/
qual = node->ps.qual;
projInfo = node->ps.ps_ProjInfo;
econtext = node->ps.ps_ExprContext;
/*
* If we have neither a qual to check nor a projection to do, just skip
* all the overhead and return the raw scan tuple.
*/
if (!qual && !projInfo)
{
ResetExprContext(econtext);
return ExecScanFetch(node, accessMtd, recheckMtd);
}
/*
* Check to see if we're still projecting out tuples from a previous scan
@ -148,7 +152,6 @@ ExecScan(ScanState *node,
* storage allocated in the previous tuple cycle. Note this can't happen
* until we're done projecting out tuples from a scan tuple.
*/
econtext = node->ps.ps_ExprContext;
ResetExprContext(econtext);
/*