| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /*------------------------------------------------------------------------- |
| * |
| * var.h |
| * prototypes for optimizer/util/var.c. |
| * |
| * |
| * Portions Copyright (c) 2006-2009, Greenplum inc |
| * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group |
| * Portions Copyright (c) 1994, Regents of the University of California |
| * |
| * $PostgreSQL: pgsql/src/include/optimizer/var.h,v 1.34 2006/03/05 15:58:57 momjian Exp $ |
| * |
| *------------------------------------------------------------------------- |
| */ |
| #ifndef VAR_H |
| #define VAR_H |
| |
| #include "nodes/relation.h" |
| |
| |
| typedef bool (*Cdb_walk_vars_callback_Aggref)(Aggref *aggref, void *context, int sublevelsup); |
| typedef bool (*Cdb_walk_vars_callback_Var)(Var *var, void *context, int sublevelsup); |
| typedef bool (*Cdb_walk_vars_callback_CurrentOf)(CurrentOfExpr *expr, void *context, int sublevelsup); |
| bool cdb_walk_vars(Node *node, |
| Cdb_walk_vars_callback_Var callback_var, |
| Cdb_walk_vars_callback_Aggref callback_aggref, |
| Cdb_walk_vars_callback_CurrentOf callback_currentof, |
| void *context, |
| int levelsup); |
| |
| extern Relids pull_varnos(Node *node); |
| |
| extern bool contain_ctid_var_reference(Scan *scan); |
| extern bool contain_var_clause(Node *node); |
| extern bool contain_vars_of_level(Node *node, int levelsup); |
| extern bool contain_vars_of_level_or_above(Node *node, int levelsup); |
| extern int find_minimum_var_level(Node *node); |
| extern List *pull_var_clause(Node *node, bool includeUpperVars); |
| |
| extern Node *flatten_join_alias_vars(PlannerInfo *root, Node *node); |
| |
| #endif /* VAR_H */ |