rel = heap_open(DatabaseRelationId, AccessShareLock);
 
    ScanKeyInit(&skey,
-               ObjectIdAttributeNumber,
+               Anum_pg_database_oid,
                BTEqualStrategyNumber, F_OIDEQ,
                ObjectIdGetDatum(databaseId));
 
 
    rel = heap_open(ProcedureRelationId, AccessShareLock);
 
    ScanKeyInit(&skey,
-               ObjectIdAttributeNumber,
+               Anum_pg_proc_oid,
                BTEqualStrategyNumber, F_OIDEQ,
                ObjectIdGetDatum(functionId));
 
    rel = heap_open(ProcedureRelationId, AccessShareLock);
 
    ScanKeyInit(&skey,
-               ObjectIdAttributeNumber,
+               Anum_pg_proc_oid,
                BTEqualStrategyNumber, F_OIDEQ,
                ObjectIdGetDatum(functionId));
 
 
    rel = heap_open(RelationRelationId, AccessShareLock);
 
    ScanKeyInit(&skey,
-               ObjectIdAttributeNumber,
+               Anum_pg_class_oid,
                BTEqualStrategyNumber, F_OIDEQ,
                ObjectIdGetDatum(relOid));
 
    rel = heap_open(RelationRelationId, AccessShareLock);
 
    ScanKeyInit(&skey,
-               ObjectIdAttributeNumber,
+               Anum_pg_class_oid,
                BTEqualStrategyNumber, F_OIDEQ,
                ObjectIdGetDatum(relOid));
 
 
    rel = heap_open(NamespaceRelationId, AccessShareLock);
 
    ScanKeyInit(&skey,
-               ObjectIdAttributeNumber,
+               Anum_pg_namespace_oid,
                BTEqualStrategyNumber, F_OIDEQ,
                ObjectIdGetDatum(namespaceId));