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/*-------------------------------------------------------------------------
*
* var.h
* prototypes for var.c.
*
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: var.h,v 1.18 2002/03/12 00:52:04 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef VAR_H
#define VAR_H
#include "nodes/parsenodes.h"
extern List *pull_varnos(Node *node);
extern bool contain_var_reference(Node *node, int varno, int varattno,
int levelsup);
extern bool contain_whole_tuple_var(Node *node, int varno, int levelsup);
extern bool contain_var_clause(Node *node);
extern List *pull_var_clause(Node *node, bool includeUpperVars);
extern Node *flatten_join_alias_vars(Node *node, Query *root, int expandRTI);
extern void build_join_alias_subvars(Query *root, Var *aliasvar,
Var **leftsubvar, Var **rightsubvar);
#endif /* VAR_H */
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