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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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21
src/backend/rewrite/rewriteRemove.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/rewrite/rewriteRemove.c,v 1.64 2006/03/05 15:58:36 momjian Exp $
* $PostgreSQL: pgsql/src/backend/rewrite/rewriteRemove.c,v 1.65 2006/06/16 20:23:44 adunstan Exp $
*
*-------------------------------------------------------------------------
*/
@ -34,7 +34,8 @@
* Delete a rule given its name.
*/
void
RemoveRewriteRule(Oid owningRel, const char *ruleName, DropBehavior behavior)
RemoveRewriteRule(Oid owningRel, const char *ruleName, DropBehavior behavior,
bool missing_ok)
{
HeapTuple tuple;
Oid eventRelationOid;
@ -53,10 +54,18 @@ RemoveRewriteRule(Oid owningRel, const char *ruleName, DropBehavior behavior)
* complain if no rule with such name exists
*/
if (!HeapTupleIsValid(tuple))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("rule \"%s\" for relation \"%s\" does not exist",
ruleName, get_rel_name(owningRel))));
{
if (! missing_ok)
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("rule \"%s\" for relation \"%s\" does not exist",
ruleName, get_rel_name(owningRel))));
else
ereport(NOTICE,
(errmsg("rule \"%s\" for relation \"%s\" does not exist ... skipping",
ruleName, get_rel_name(owningRel))));
return;
}
/*
* Verify user has appropriate permissions.