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Make ALTER .. SET SCHEMA do nothing, instead of throwing an ERROR.

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This was already true for CREATE EXTENSION, but historically has not
been true for other object types.  Therefore, this is a backward
incompatibility.  Per discussion on pgsql-hackers, everyone seems to
agree that the new behavior is better.

Marti Raudsepp, reviewed by Haribabu Kommi and myself
This commit is contained in:
Robert Haas
2015-11-19 10:49:25 -05:00
parent f11c557e92
commit bc4996e61b
10 changed files with 61 additions and 43 deletions
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14
src/backend/commands/tablecmds.c
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@ -11350,7 +11350,7 @@ AlterTableNamespace(AlterObjectSchemaStmt *stmt, Oid *oldschema)
nspOid = RangeVarGetAndCheckCreationNamespace(newrv, NoLock, NULL);
/* common checks on switching namespaces */
CheckSetNamespace(oldNspOid, nspOid, RelationRelationId, relid);
CheckSetNamespace(oldNspOid, nspOid);
objsMoved = new_object_addresses();
AlterTableNamespaceInternal(rel, oldNspOid, nspOid, objsMoved);
@ -11418,6 +11418,7 @@ AlterRelationNamespaceInternal(Relation classRel, Oid relOid,
HeapTuple classTup;
Form_pg_class classForm;
ObjectAddress thisobj;
bool already_done = false;
classTup = SearchSysCacheCopy1(RELOID, ObjectIdGetDatum(relOid));
if (!HeapTupleIsValid(classTup))
@ -11431,9 +11432,12 @@ AlterRelationNamespaceInternal(Relation classRel, Oid relOid,
thisobj.objectSubId = 0;
/*
* Do nothing when there's nothing to do.
* If the object has already been moved, don't move it again. If it's
* already in the right place, don't move it, but still fire the object
* access hook.
*/
if (!object_address_present(&thisobj, objsMoved))
already_done = object_address_present(&thisobj, objsMoved);
if (!already_done && oldNspOid != newNspOid)
{
/* check for duplicate name (more friendly than unique-index failure) */
if (get_relname_relid(NameStr(classForm->relname),
@ -11459,7 +11463,9 @@ AlterRelationNamespaceInternal(Relation classRel, Oid relOid,
newNspOid) != 1)
elog(ERROR, "failed to change schema dependency for relation \"%s\"",
NameStr(classForm->relname));
}
if (!already_done)
{
add_exact_object_address(&thisobj, objsMoved);
InvokeObjectPostAlterHook(RelationRelationId, relOid, 0);