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Prevent intratransaction memory leak when a subtransaction is aborted

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in the middle of executing a SPI query.  This doesn't entirely fix the
problem of memory leakage in plpgsql exception handling, but it should
get rid of the lion's share of leakage.
This commit is contained in:
Tom Lane 2006-11-21 22:35:29 +00:00
parent 5fc2d7e451
commit 7ec1c5a867
1 changed files with 14 additions and 1 deletions
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15
src/backend/executor/spi.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/executor/spi.c,v 1.164 2006/10/04 00:29:53 momjian Exp $
* $PostgreSQL: pgsql/src/backend/executor/spi.c,v 1.165 2006/11/21 22:35:29 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -254,6 +254,19 @@ AtEOSubXact_SPI(bool isCommit, SubTransactionId mySubid)
(errcode(ERRCODE_WARNING),
errmsg("subtransaction left non-empty SPI stack"),
errhint("Check for missing \"SPI_finish\" calls.")));
/*
* If we are aborting a subtransaction and there is an open SPI context
* surrounding the subxact, clean up to prevent memory leakage.
*/
if (_SPI_current && !isCommit)
{
/* free Executor memory the same as _SPI_end_call would do */
MemoryContextResetAndDeleteChildren(_SPI_current->execCxt);
/* throw away any partially created tuple-table */
SPI_freetuptable(_SPI_current->tuptable);
_SPI_current->tuptable = NULL;
}
}