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Clean up per-tuple memory leaks in trigger firing and plpgsql

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expression evaluation.
This commit is contained in:
Tom Lane
2001-01-22 00:50:07 +00:00
parent 59a3a40149
commit c9fe128316
9 changed files with 160 additions and 147 deletions
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38
src/backend/executor/execUtils.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/execUtils.c,v 1.70 2000/12/27 23:59:11 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/execUtils.c,v 1.71 2001/01/22 00:50:07 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -230,6 +230,26 @@ FreeExprContext(ExprContext *econtext)
pfree(econtext);
}
/*
* Build a per-output-tuple ExprContext for an EState.
*
* This is normally invoked via GetPerTupleExprContext() macro.
*/
ExprContext *
MakePerTupleExprContext(EState *estate)
{
if (estate->es_per_tuple_exprcontext == NULL)
{
MemoryContext oldContext;
oldContext = MemoryContextSwitchTo(estate->es_query_cxt);
estate->es_per_tuple_exprcontext =
MakeExprContext(NULL, estate->es_query_cxt);
MemoryContextSwitchTo(oldContext);
}
return estate->es_per_tuple_exprcontext;
}
/* ----------------------------------------------------------------
* Result slot tuple type and ProjectionInfo support
* ----------------------------------------------------------------
@ -836,21 +856,9 @@ ExecInsertIndexTuples(TupleTableSlot *slot,
/*
* We will use the EState's per-tuple context for evaluating predicates
* and functional-index functions. Create it if it's not already there;
* if it is, reset it to free previously-used storage.
* and functional-index functions (creating it if it's not already there).
*/
econtext = estate->es_per_tuple_exprcontext;
if (econtext == NULL)
{
MemoryContext oldContext;
oldContext = MemoryContextSwitchTo(estate->es_query_cxt);
estate->es_per_tuple_exprcontext = econtext =
MakeExprContext(NULL, estate->es_query_cxt);
MemoryContextSwitchTo(oldContext);
}
else
ResetExprContext(econtext);
econtext = GetPerTupleExprContext(estate);
/* Arrange for econtext's scan tuple to be the tuple under test */
econtext->ecxt_scantuple = slot;