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Dir : ~/usr/include/pgsql/server/optimizer/

Edit File: placeholder.h

/*-------------------------------------------------------------------------
 *
 * placeholder.h
 *	  prototypes for optimizer/util/placeholder.c.
 *
 *
 * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/optimizer/placeholder.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef PLACEHOLDER_H
#define PLACEHOLDER_H

#include "nodes/relation.h"

extern PlaceHolderVar *make_placeholder_expr(PlannerInfo *root, Expr *expr,
					  Relids phrels);
extern PlaceHolderInfo *find_placeholder_info(PlannerInfo *root,
					  PlaceHolderVar *phv, bool create_new_ph);
extern void find_placeholders_in_jointree(PlannerInfo *root);
extern void mark_placeholder_maybe_needed(PlannerInfo *root,
							  PlaceHolderInfo *phinfo, Relids relids);
extern void update_placeholder_eval_levels(PlannerInfo *root,
							   SpecialJoinInfo *new_sjinfo);
extern void fix_placeholder_input_needed_levels(PlannerInfo *root);
extern void add_placeholders_to_base_rels(PlannerInfo *root);
extern void add_placeholders_to_joinrel(PlannerInfo *root,
							RelOptInfo *joinrel);

#endif   /* PLACEHOLDER_H */