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First stage of reclaiming memory in executor by resetting short-term

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memory contexts.  Currently, only leaks in expressions executed as
quals or projections are handled.  Clean up some old dead cruft in
executor while at it --- unused fields in state nodes, that sort of thing.
This commit is contained in:
Tom Lane
2000-07-12 02:37:39 +00:00
parent 46fb9c29e2
commit badce86a2c
53 changed files with 1536 additions and 1584 deletions
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30
src/backend/executor/functions.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/functions.c,v 1.35 2000/06/28 03:31:33 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/functions.c,v 1.36 2000/07/12 02:37:03 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -57,20 +57,18 @@ ProjectAttribute(TupleDesc TD,
HeapTuple tup,
bool *isnullP)
{
Datum val,
valueP;
Datum val;
Var *attrVar = (Var *) tlist->expr;
AttrNumber attrno = attrVar->varattno;
val = heap_getattr(tup, attrno, TD, isnullP);
if (*isnullP)
return (Datum) NULL;
valueP = datumCopy(val,
TD->attrs[attrno - 1]->atttypid,
TD->attrs[attrno - 1]->attbyval,
(Size) TD->attrs[attrno - 1]->attlen);
return valueP;
if (*isnullP)
return (Datum) 0;
return datumCopy(val,
TD->attrs[attrno - 1]->attbyval,
TD->attrs[attrno - 1]->attlen);
}
static execution_state *
@ -351,10 +349,18 @@ postquel_function(FunctionCallInfo fcinfo,
List *func_tlist,
bool *isDone)
{
MemoryContext oldcontext;
execution_state *es;
Datum result = 0;
CommandId savedId;
/*
* Switch to context in which the fcache lives. This ensures that
* parsetrees, plans, etc, will have sufficient lifetime. The
* sub-executor is responsible for deleting per-tuple information.
*/
oldcontext = MemoryContextSwitchTo(fcache->fcacheCxt);
/*
* Before we start do anything we must save CurrentScanCommandId to
* restore it before return to upper Executor. Also, we have to set
@ -416,6 +422,7 @@ postquel_function(FunctionCallInfo fcinfo,
* Let caller know we're finished.
*/
*isDone = true;
MemoryContextSwitchTo(oldcontext);
return (fcache->oneResult) ? result : (Datum) NULL;
}
@ -426,5 +433,8 @@ postquel_function(FunctionCallInfo fcinfo,
Assert(LAST_POSTQUEL_COMMAND(es));
*isDone = false;
MemoryContextSwitchTo(oldcontext);
return result;
}