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Tweak CreateTrigger() so that the OID used in the name of an 

RI_ConstraintTrigger is the same OID assigned to the pg_trigger row.
This reduces consumption of OIDs and may ease debugging.
This commit is contained in:
Tom Lane 2002-07-20 19:55:38 +00:00
parent 17b28503d0
commit b70b78656b
1 changed files with 21 additions and 3 deletions
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24
src/backend/commands/trigger.c
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/trigger.c,v 1.122 2002/07/20 05:16:57 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/trigger.c,v 1.123 2002/07/20 19:55:38 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -50,6 +50,14 @@ static void DeferredTriggerExecute(DeferredTriggerEvent event, int itemno,
MemoryContext per_tuple_context);
/*
* Create a trigger. Returns the OID of the created trigger.
*
* forConstraint, if true, says that this trigger is being created to
* implement a constraint. The caller will then be expected to make
* a pg_depend entry linking the trigger to that constraint (and thereby
* to the owning relation(s)).
*/
Oid
CreateTrigger(CreateTrigStmt *stmt, bool forConstraint)
{
@ -94,6 +102,12 @@ CreateTrigger(CreateTrigStmt *stmt, bool forConstraint)
if (aclresult != ACLCHECK_OK)
aclcheck_error(aclresult, RelationGetRelationName(rel));
/*
* Generate the trigger's OID now, so that we can use it in the name
* if needed.
*/
trigoid = newoid();
/*
* If trigger is an RI constraint, use specified trigger name as
* constraint name and build a unique trigger name instead.
@ -103,7 +117,7 @@ CreateTrigger(CreateTrigStmt *stmt, bool forConstraint)
if (stmt->isconstraint)
{
snprintf(constrtrigname, sizeof(constrtrigname),
"RI_ConstraintTrigger_%u", newoid());
"RI_ConstraintTrigger_%u", trigoid);
trigname = constrtrigname;
constrname = stmt->trigname;
}
@ -279,10 +293,14 @@ CreateTrigger(CreateTrigStmt *stmt, bool forConstraint)
tuple = heap_formtuple(tgrel->rd_att, values, nulls);
/* force tuple to have the desired OID */
AssertTupleDescHasOid(tgrel->rd_att);
HeapTupleSetOid(tuple, trigoid);
/*
* Insert tuple into pg_trigger.
*/
trigoid = simple_heap_insert(tgrel, tuple);
simple_heap_insert(tgrel, tuple);
CatalogOpenIndices(Num_pg_trigger_indices, Name_pg_trigger_indices, idescs);
CatalogIndexInsert(idescs, Num_pg_trigger_indices, tgrel, tuple);