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/*-------------------------------------------------------------------------
*
* var.h
* prototypes for optimizer/util/var.c.
*
*
* Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/optimizer/var.h
*
*-------------------------------------------------------------------------
*/
#ifndef VAR_H
#define VAR_H
#include "nodes/relation.h"
/* Bits that can be OR'd into the flags argument of pull_var_clause() */
#define PVC_INCLUDE_AGGREGATES 0x0001 /* include Aggrefs in output list */
#define PVC_RECURSE_AGGREGATES 0x0002 /* recurse into Aggref arguments */
#define PVC_INCLUDE_WINDOWFUNCS 0x0004 /* include WindowFuncs in output list */
#define PVC_RECURSE_WINDOWFUNCS 0x0008 /* recurse into WindowFunc arguments */
#define PVC_INCLUDE_PLACEHOLDERS 0x0010 /* include PlaceHolderVars in
* output list */
#define PVC_RECURSE_PLACEHOLDERS 0x0020 /* recurse into PlaceHolderVar
* arguments */
extern Relids pull_varnos(Node *node);
extern Relids pull_varnos_of_level(Node *node, int levelsup);
extern void pull_varattnos(Node *node, Index varno, Bitmapset **varattnos);
extern List *pull_vars_of_level(Node *node, int levelsup);
extern bool contain_var_clause(Node *node);
extern bool contain_vars_of_level(Node *node, int levelsup);
extern int locate_var_of_level(Node *node, int levelsup);
extern List *pull_var_clause(Node *node, int flags);
extern Node *flatten_join_alias_vars(PlannerInfo *root, Node *node);
#endif /* VAR_H */
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