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Adjust nodeFunctionscan.c to reset transient memory context between calls

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to the table function, thus preventing memory leakage accumulation across
calls.  This means that SRFs need to be careful to distinguish permanent
and local storage; adjust code and documentation accordingly.  Patch by
Joe Conway, very minor tweaks by Tom Lane.
This commit is contained in:
Tom Lane
2002-08-29 17:14:33 +00:00
parent 0201dac1c3
commit e4186762ff
10 changed files with 154 additions and 134 deletions
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8
src/backend/executor/nodeFunctionscan.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/nodeFunctionscan.c,v 1.6 2002/08/29 00:17:04 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/nodeFunctionscan.c,v 1.7 2002/08/29 17:14:33 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -428,6 +428,12 @@ function_getonetuple(FunctionScanState *scanstate,
ExprContext *econtext = scanstate->csstate.cstate.cs_ExprContext;
TupleTableSlot *slot = scanstate->csstate.css_ScanTupleSlot;
/*
* reset per-tuple memory context before each call of the function.
* This cleans up any local memory the function may leak when called.
*/
ResetExprContext(econtext);
/*
* get the next Datum from the function
*/