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This commit is contained in:
Tom Lane 2008-11-05 20:17:18 +00:00
parent 0db527c05b
commit 53b4e469ca
1 changed files with 10 additions and 5 deletions
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15
src/backend/utils/adt/trigfuncs.c
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California * Portions Copyright (c) 1994, Regents of the University of California
* *
* $PostgreSQL: pgsql/src/backend/utils/adt/trigfuncs.c,v 1.4 2008/11/05 19:15:15 adunstan Exp $ * $PostgreSQL: pgsql/src/backend/utils/adt/trigfuncs.c,v 1.5 2008/11/05 20:17:18 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -62,11 +62,17 @@ suppress_redundant_updates_trigger(PG_FUNCTION_ARGS)
newheader = newtuple->t_data; newheader = newtuple->t_data;
oldheader = oldtuple->t_data; oldheader = oldtuple->t_data;
/*
* We are called before the OID, if any, has been transcribed from the
* old tuple to the new (in heap_update). To avoid a bogus compare
* failure, copy the OID now. But check that someone didn't already put
* another OID value into newtuple. (That's not actually possible at
* present, but maybe someday.)
*/
if (trigdata->tg_relation->rd_rel->relhasoids && if (trigdata->tg_relation->rd_rel->relhasoids &&
!OidIsValid(HeapTupleHeaderGetOid(newheader))) !OidIsValid(HeapTupleHeaderGetOid(newheader)))
HeapTupleHeaderSetOid(newheader, HeapTupleHeaderGetOid(oldheader)); HeapTupleHeaderSetOid(newheader, HeapTupleHeaderGetOid(oldheader));
/* if the tuple payload is the same ... */ /* if the tuple payload is the same ... */
if (newtuple->t_len == oldtuple->t_len && if (newtuple->t_len == oldtuple->t_len &&
newheader->t_hoff == oldheader->t_hoff && newheader->t_hoff == oldheader->t_hoff &&
@ -81,7 +87,6 @@ suppress_redundant_updates_trigger(PG_FUNCTION_ARGS)
/* ... then suppress the update */ /* ... then suppress the update */
rettuple = NULL; rettuple = NULL;
} }
return PointerGetDatum(rettuple);
return PointerGetDatum(rettuple);
} }