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Commit25ee160

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More paranoia in AtEOSubXact_SPI: don't assume we can safely use SPI_finish
for cleaning up. It seems possible that the memory contexts SPI_finishwould try to touch are already gone; and there's no need for SPI itselfto delete them, since the containing contexts will surely be going awayanyway at transaction end.
1 parent1732cb0 commit25ee160

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1 file changed

+16
-5
lines changed
  • src/backend/executor

1 file changed

+16
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‎src/backend/executor/spi.c

Lines changed: 16 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
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*
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* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/backend/executor/spi.c,v 1.119 2004/07/0100:50:26 tgl Exp $
11+
* $PostgreSQL: pgsql/src/backend/executor/spi.c,v 1.120 2004/07/0121:17:13 tgl Exp $
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*
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*-------------------------------------------------------------------------
1414
*/
@@ -206,16 +206,27 @@ AtEOSubXact_SPI(bool isCommit, TransactionId childXid)
206206
while (_SPI_connected >=0)
207207
{
208208
_SPI_connection*connection=&(_SPI_stack[_SPI_connected]);
209-
intres;
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211210
if (connection->connectXid!=childXid)
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break;/* couldn't be any underneath it either */
213212

214213
found= true;
215214

216-
_SPI_curid=_SPI_connected-1;/* avoid begin_call error */
217-
res=SPI_finish();
218-
Assert(res==SPI_OK_FINISH);
215+
/*
216+
* Pop the stack entry and reset global variables. Unlike
217+
* SPI_finish(), we don't risk switching to memory contexts that
218+
* might be already gone, or deleting memory contexts that have been
219+
* or will be thrown away anyway.
220+
*/
221+
_SPI_connected--;
222+
_SPI_curid=_SPI_connected;
223+
if (_SPI_connected==-1)
224+
_SPI_current=NULL;
225+
else
226+
_SPI_current=&(_SPI_stack[_SPI_connected]);
227+
SPI_processed=0;
228+
SPI_lastoid=InvalidOid;
229+
SPI_tuptable=NULL;
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}
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221232
if (found&&isCommit)

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