/*
* Translate an object name and arguments (as passed by the parser) to an
* ObjectAddress.
*
* The returned object will be locked using the specified lockmode. If a
* sub-object is looked up, the parent object will be locked instead.
*
* If the object is a relation or a child object of a relation (e.g. an
* attribute or contraint), the relation is also opened and *relp receives
* the open relcache entry pointer; otherwise, *relp is set to NULL. This
* is a bit grotty but it makes life simpler, since the caller will
* typically need the relcache entry too. Caller must close the relcache
* entry when done with it. The relation is locked with the specified lockmode
* if the target object is the relation itself or an attribute, but for other
* child objects, only ACCESS_SHR_LOCK is acquired on the relation.
*
* We don't currently provide a function to release the locks acquired here;
* typically, the lock must be held until commit to guard against a concurrent
* drop operation.
*/
struct objaddr
get_object_address(
objtype_e objtype,
struct list* objname,
struct list* objargs,
struct relation** relp,
lockmode_t lockmode)
{
struct objaddr address;
struct relation* relation = NULL;
/* Some kind of lock must be taken. */
ASSERT(lockmode != NO_LOCK);
switch (objtype) {
case OBJECT_INDEX:
case OBJECT_SEQUENCE:
case OBJECT_TABLE:
case OBJECT_VIEW:
case OBJECT_FOREIGN_TABLE:
relation = get_rel_by_qualified_name(objtype, objname, lockmode);
address.classId = RelationRelationId;
address.objectId = REL_ID(relation);
address.objectSubId = 0;
break;
case OBJECT_COLUMN:
address = get_objaddr_attr(objtype, objname, &relation, lockmode);
break;
case OBJECT_RULE:
case OBJECT_TRIGGER:
case OBJECT_CONSTRAINT:
address = get_objaddr_relobj(objtype, objname, &relation);
break;
case OBJECT_DATABASE:
case OBJECT_EXTENSION:
case OBJECT_TABLESPACE:
case OBJECT_ROLE:
case OBJECT_SCHEMA:
case OBJECT_LANGUAGE:
case OBJECT_FDW:
case OBJECT_FOREIGN_SERVER:
address = get_objaddr_unqualified(objtype, objname);
break;
case OBJECT_TYPE:
case OBJECT_DOMAIN:
address.classId = TypeRelationId;
address.objectId = typename_to_oid(NULL, makeTypeNameFromNameList(objname));
address.objectSubId = 0;
break;
case OBJECT_AGGREGATE:
address.classId = ProcedureRelationId;
address.objectId = LookupAggNameTypeNames(objname, objargs, false);
address.objectSubId = 0;
break;
case OBJECT_FUNCTION:
address.classId = ProcedureRelationId;
address.objectId = LookupFuncNameTypeNames(objname, objargs, false);
address.objectSubId = 0;
break;
case OBJECT_OPERATOR:
ASSERT(list_length(objargs) == 2);
address.classId = OperatorRelationId;
address.objectId = lookup_opr_name_type_names(
NULL,
objname,
(type_name_n*) linitial(objargs),
(type_name_n*) lsecond(objargs),
false,
-1);
address.objectSubId = 0;
break;
case OBJECT_COLLATION:
address.classId = CollationRelationId;
address.objectId = get_collation_oid(objname, false);
address.objectSubId = 0;
break;
case OBJECT_CONVERSION:
address.classId = ConversionRelationId;
address.objectId = get_conversion_oid(objname, false);
address.objectSubId = 0;
break;
case OBJECT_OPCLASS:
case OBJECT_OPFAMILY:
address = get_objaddr_opcf(objtype, objname, objargs);
break;
case OBJECT_LARGEOBJECT:
ASSERT(list_length(objname) == 1);
address.classId = LargeObjectRelationId;
address.objectId = oidparse(linitial(objname));
address.objectSubId = 0;
if (!large_obj_exists(address.objectId)) {
ereport(ERROR, (
errcode(E_UNDEFINED_OBJECT),
errmsg("large object %u does not exist",
address.objectId)));
}
break;
case OBJECT_CAST: {
type_name_n* sourcetype;
type_name_n* targettype;
oid_t sourcetypeid;
oid_t targettypeid;
sourcetype = (type_name_n*) linitial(objname);
targettype = (type_name_n*) linitial(objargs);
sourcetypeid = typename_to_oid(NULL, sourcetype);
targettypeid = typename_to_oid(NULL, targettype);
address.classId = CastRelationId;
address.objectId = get_cast_oid(sourcetypeid, targettypeid, false);
address.objectSubId = 0;
}
break;
case OBJECT_TSPARSER:
address.classId = TSParserRelationId;
address.objectId = get_ts_parser_oid(objname, false);
address.objectSubId = 0;
break;
case OBJECT_TSDICTIONARY:
address.classId = TSDictionaryRelationId;
address.objectId = get_ts_dict_oid(objname, false);
address.objectSubId = 0;
break;
case OBJECT_TSTEMPLATE:
address.classId = TSTemplateRelationId;
address.objectId = get_ts_template_oid(objname, false);
address.objectSubId = 0;
break;
case OBJECT_TSCONFIGURATION:
address.classId = TSConfigRelationId;
address.objectId = get_ts_config_oid(objname, false);
address.objectSubId = 0;
break;
default:
elog(ERROR, "unrecognized objtype: %d", (int) objtype);
/* placate compiler, in case it thinks elog might return */
address.classId = INVALID_OID;
address.objectId = INVALID_OID;
address.objectSubId = 0;
}
/*
* If we're dealing with a relation or attribute, then the relation is
* already locked. If we're dealing with any other type of object, we
* need to lock it and then verify that it still exists.
*/
if (address.classId != RelationRelationId) {
if (is_shared_rel(address.classId))
lock_sobj(address.classId, address.objectId, 0, lockmode);
else
lock_db_obj(address.classId, address.objectId, 0, lockmode);
/* Did it go away while we were waiting for the lock? */
if (!object_exists(address)) {
elog(ERROR,
"cache lookup failed for class %u object %u subobj %d",
address.classId,
address.objectId,
address.objectSubId);
}
}
/* Return the object address and the relation. */
*relp = relation;
return address;
}
/*
* Translate an object name and arguments (as passed by the parser) to an
* ObjectAddress.
*
* The returned object will be locked using the specified lockmode. If a
* sub-object is looked up, the parent object will be locked instead.
*
* If the object is a relation or a child object of a relation (e.g. an
* attribute or contraint), the relation is also opened and *relp receives
* the open relcache entry pointer; otherwise, *relp is set to NULL. This
* is a bit grotty but it makes life simpler, since the caller will
* typically need the relcache entry too. Caller must close the relcache
* entry when done with it. The relation is locked with the specified lockmode
* if the target object is the relation itself or an attribute, but for other
* child objects, only AccessShareLock is acquired on the relation.
*
* We don't currently provide a function to release the locks acquired here;
* typically, the lock must be held until commit to guard against a concurrent
* drop operation.
*/
ObjectAddress
get_object_address(ObjectType objtype, List *objname, List *objargs,
Relation *relp, LOCKMODE lockmode)
{
ObjectAddress address;
Relation relation = NULL;
/* Some kind of lock must be taken. */
Assert(lockmode != NoLock);
switch (objtype)
{
case OBJECT_INDEX:
case OBJECT_SEQUENCE:
case OBJECT_TABLE:
case OBJECT_VIEW:
case OBJECT_FOREIGN_TABLE:
relation =
get_relation_by_qualified_name(objtype, objname, lockmode);
address.classId = RelationRelationId;
address.objectId = RelationGetRelid(relation);
address.objectSubId = 0;
break;
case OBJECT_COLUMN:
address =
get_object_address_attribute(objtype, objname, &relation,
lockmode);
break;
case OBJECT_RULE:
case OBJECT_TRIGGER:
case OBJECT_CONSTRAINT:
address = get_object_address_relobject(objtype, objname, &relation);
break;
case OBJECT_DATABASE:
case OBJECT_EXTENSION:
case OBJECT_TABLESPACE:
case OBJECT_ROLE:
case OBJECT_SCHEMA:
case OBJECT_LANGUAGE:
case OBJECT_FDW:
case OBJECT_FOREIGN_SERVER:
address = get_object_address_unqualified(objtype, objname);
break;
case OBJECT_TYPE:
case OBJECT_DOMAIN:
address.classId = TypeRelationId;
address.objectId =
typenameTypeId(NULL, makeTypeNameFromNameList(objname));
address.objectSubId = 0;
break;
case OBJECT_AGGREGATE:
address.classId = ProcedureRelationId;
address.objectId = LookupAggNameTypeNames(objname, objargs, false);
address.objectSubId = 0;
break;
case OBJECT_FUNCTION:
address.classId = ProcedureRelationId;
address.objectId = LookupFuncNameTypeNames(objname, objargs, false);
address.objectSubId = 0;
break;
case OBJECT_OPERATOR:
Assert(list_length(objargs) == 2);
address.classId = OperatorRelationId;
address.objectId =
LookupOperNameTypeNames(NULL, objname,
(TypeName *) linitial(objargs),
(TypeName *) lsecond(objargs),
false, -1);
address.objectSubId = 0;
break;
case OBJECT_COLLATION:
address.classId = CollationRelationId;
address.objectId = get_collation_oid(objname, false);
address.objectSubId = 0;
break;
case OBJECT_CONVERSION:
address.classId = ConversionRelationId;
address.objectId = get_conversion_oid(objname, false);
address.objectSubId = 0;
break;
case OBJECT_OPCLASS:
case OBJECT_OPFAMILY:
address = get_object_address_opcf(objtype, objname, objargs);
break;
case OBJECT_LARGEOBJECT:
Assert(list_length(objname) == 1);
address.classId = LargeObjectRelationId;
address.objectId = oidparse(linitial(objname));
address.objectSubId = 0;
if (!LargeObjectExists(address.objectId))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("large object %u does not exist",
address.objectId)));
break;
case OBJECT_CAST:
{
TypeName *sourcetype = (TypeName *) linitial(objname);
TypeName *targettype = (TypeName *) linitial(objargs);
Oid sourcetypeid = typenameTypeId(NULL, sourcetype);
Oid targettypeid = typenameTypeId(NULL, targettype);
address.classId = CastRelationId;
address.objectId =
get_cast_oid(sourcetypeid, targettypeid, false);
address.objectSubId = 0;
}
break;
case OBJECT_TSPARSER:
address.classId = TSParserRelationId;
address.objectId = get_ts_parser_oid(objname, false);
address.objectSubId = 0;
break;
case OBJECT_TSDICTIONARY:
address.classId = TSDictionaryRelationId;
address.objectId = get_ts_dict_oid(objname, false);
address.objectSubId = 0;
break;
case OBJECT_TSTEMPLATE:
address.classId = TSTemplateRelationId;
address.objectId = get_ts_template_oid(objname, false);
address.objectSubId = 0;
break;
case OBJECT_TSCONFIGURATION:
address.classId = TSConfigRelationId;
address.objectId = get_ts_config_oid(objname, false);
address.objectSubId = 0;
break;
default:
elog(ERROR, "unrecognized objtype: %d", (int) objtype);
/* placate compiler, in case it thinks elog might return */
address.classId = InvalidOid;
address.objectId = InvalidOid;
address.objectSubId = 0;
}
/*
* If we're dealing with a relation or attribute, then the relation is
* already locked. If we're dealing with any other type of object, we need
* to lock it and then verify that it still exists.
*/
if (address.classId != RelationRelationId)
{
if (IsSharedRelation(address.classId))
LockSharedObject(address.classId, address.objectId, 0, lockmode);
else
LockDatabaseObject(address.classId, address.objectId, 0, lockmode);
/* Did it go away while we were waiting for the lock? */
if (!object_exists(address))
elog(ERROR, "cache lookup failed for class %u object %u subobj %d",
address.classId, address.objectId, address.objectSubId);
}
/* Return the object address and the relation. */
*relp = relation;
return address;
}