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DROP ... IF EXISTS for the following cases:

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language, tablespace, trigger, rule, opclass, function, aggregate. operator, and cast.
This commit is contained in:
Andrew Dunstan
2006-06-16 20:23:45 +00:00
parent e79cc2db00
commit bbcd01692b
15 changed files with 271 additions and 58 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
* $PostgreSQL: pgsql/src/backend/commands/trigger.c,v 1.202 2006/05/30 14:01:57 momjian Exp $
* $PostgreSQL: pgsql/src/backend/commands/trigger.c,v 1.203 2006/06/16 20:23:44 adunstan Exp $
*
*-------------------------------------------------------------------------
*/
@ -452,7 +452,8 @@ CreateTrigger(CreateTrigStmt *stmt, bool forConstraint)
* DropTrigger - drop an individual trigger by name
*/
void
DropTrigger(Oid relid, const char *trigname, DropBehavior behavior)
DropTrigger(Oid relid, const char *trigname, DropBehavior behavior,
bool missing_ok)
{
Relation tgrel;
ScanKeyData skey[2];
@ -481,10 +482,21 @@ DropTrigger(Oid relid, const char *trigname, DropBehavior behavior)
tup = systable_getnext(tgscan);
if (!HeapTupleIsValid(tup))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("trigger \"%s\" for table \"%s\" does not exist",
trigname, get_rel_name(relid))));
{
if (! missing_ok)
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("trigger \"%s\" for table \"%s\" does not exist",
trigname, get_rel_name(relid))));
else
ereport(NOTICE,
(errmsg("trigger \"%s\" for table \"%s\" does not exist ...skipping",
trigname, get_rel_name(relid))));
/* cleanup */
systable_endscan(tgscan);
heap_close(tgrel, AccessShareLock);
return;
}
if (!pg_class_ownercheck(relid, GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_CLASS,