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/*-------------------------------------------------------------------------
*
* var.h
* prototypes for optimizer/util/var.c.
*
*
* Portions Copyright (c) 1996-2012, 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"
typedef enum
{
PVC_REJECT_AGGREGATES, /* throw error if Aggref found */
PVC_INCLUDE_AGGREGATES, /* include Aggrefs in output list */
PVC_RECURSE_AGGREGATES /* recurse into Aggref arguments */
} PVCAggregateBehavior;
typedef enum
{
PVC_REJECT_PLACEHOLDERS, /* throw error if PlaceHolderVar found */
PVC_INCLUDE_PLACEHOLDERS, /* include PlaceHolderVars in output list */
PVC_RECURSE_PLACEHOLDERS /* recurse into PlaceHolderVar arguments */
} PVCPlaceHolderBehavior;
extern Relids pull_varnos(Node *node);
extern void pull_varattnos(Node *node, Index varno, Bitmapset **varattnos);
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 int locate_var_of_relation(Node *node, int relid, int levelsup);
extern int find_minimum_var_level(Node *node);
extern List *pull_var_clause(Node *node, PVCAggregateBehavior aggbehavior,
PVCPlaceHolderBehavior phbehavior);
extern Node *flatten_join_alias_vars(PlannerInfo *root, Node *node);
#endif /* VAR_H */
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