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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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40
src/backend/commands/copy.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/copy.c,v 1.117 2000/07/05 23:11:11 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/copy.c,v 1.118 2000/07/12 02:36:58 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -611,13 +611,11 @@ CopyFrom(Relation rel, bool binary, bool oids, FILE *fp, char *delim, char *null
char *predString;
Node **indexPred = NULL;
TupleDesc rtupdesc;
ExprContext *econtext = NULL;
EState *estate = makeNode(EState); /* for ExecConstraints() */
#ifndef OMIT_PARTIAL_INDEX
ExprContext *econtext = NULL;
TupleTable tupleTable;
TupleTableSlot *slot = NULL;
#endif
int natts;
AttrNumber *attnumP;
@ -651,7 +649,6 @@ CopyFrom(Relation rel, bool binary, bool oids, FILE *fp, char *delim, char *null
finfo = (FuncIndexInfo *) palloc(n_indices * sizeof(FuncIndexInfo));
finfoP = (FuncIndexInfo **) palloc(n_indices * sizeof(FuncIndexInfo *));
indexPred = (Node **) palloc(n_indices * sizeof(Node *));
econtext = NULL;
for (i = 0; i < n_indices; i++)
{
itupdescArr[i] = RelationGetDescr(index_rels[i]);
@ -680,36 +677,18 @@ CopyFrom(Relation rel, bool binary, bool oids, FILE *fp, char *delim, char *null
PointerGetDatum(&pgIndexP[i]->indpred)));
indexPred[i] = stringToNode(predString);
pfree(predString);
#ifndef OMIT_PARTIAL_INDEX
/* make dummy ExprContext for use by ExecQual */
if (econtext == NULL)
{
#ifndef OMIT_PARTIAL_INDEX
tupleTable = ExecCreateTupleTable(1);
slot = ExecAllocTableSlot(tupleTable);
econtext = makeNode(ExprContext);
econtext->ecxt_scantuple = slot;
rtupdesc = RelationGetDescr(rel);
slot->ttc_tupleDescriptor = rtupdesc;
/*
* There's no buffer associated with heap tuples
* here, so I set the slot's buffer to NULL.
* Currently, it appears that the only way a
* buffer could be needed would be if the partial
* index predicate referred to the "lock" system
* attribute. If it did, then heap_getattr would
* call HeapTupleGetRuleLock, which uses the
* buffer's descriptor to get the relation id.
* Rather than try to fix this, I'll just disallow
* partial indexes on "lock", which wouldn't be
* useful anyway. --Nels, Nov '92
*/
/* SetSlotBuffer(slot, (Buffer) NULL); */
/* SetSlotShouldFree(slot, false); */
slot->ttc_buffer = (Buffer) NULL;
slot->ttc_shouldFree = false;
#endif /* OMIT_PARTIAL_INDEX */
ExecSetSlotDescriptor(slot, rtupdesc);
econtext = MakeExprContext(slot,
TransactionCommandContext);
}
#endif /* OMIT_PARTIAL_INDEX */
}
else
indexPred[i] = NULL;
@ -927,10 +906,9 @@ CopyFrom(Relation rel, bool binary, bool oids, FILE *fp, char *delim, char *null
{
for (i = 0; i < n_indices; i++)
{
#ifndef OMIT_PARTIAL_INDEX
if (indexPred[i] != NULL)
{
#ifndef OMIT_PARTIAL_INDEX
/*
* if tuple doesn't satisfy predicate, don't
* update index
@ -939,8 +917,8 @@ CopyFrom(Relation rel, bool binary, bool oids, FILE *fp, char *delim, char *null
/* SetSlotContents(slot, tuple); */
if (!ExecQual((List *) indexPred[i], econtext, false))
continue;
#endif /* OMIT_PARTIAL_INDEX */
}
#endif /* OMIT_PARTIAL_INDEX */
FormIndexDatum(indexNatts[i],
(AttrNumber *) &(pgIndexP[i]->indkey[0]),
tuple,