/*-------------------------------------------------------------------------
 *
 * index_selfuncs.h
 *	  Index cost estimation functions for standard index access methods.
 *
 *
 * Note: this is split out of selfuncs.h mainly to avoid importing all of the
 * planner's data structures into the non-planner parts of the index AMs.
 * If you make it depend on anything besides access/amapi.h, that's likely
 * a mistake.
 *
 * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/utils/index_selfuncs.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef INDEX_SELFUNCS_H
#define INDEX_SELFUNCS_H

#include "access/amapi.h"

/* Functions in selfuncs.c */
extern void brincostestimate(struct PlannerInfo *root,
				 struct IndexPath *path,
				 double loop_count,
				 Cost *indexStartupCost,
				 Cost *indexTotalCost,
				 Selectivity *indexSelectivity,
				 double *indexCorrelation,
				 double *indexPages);
extern void btcostestimate(struct PlannerInfo *root,
			   struct IndexPath *path,
			   double loop_count,
			   Cost *indexStartupCost,
			   Cost *indexTotalCost,
			   Selectivity *indexSelectivity,
			   double *indexCorrelation,
			   double *indexPages);
extern void hashcostestimate(struct PlannerInfo *root,
				 struct IndexPath *path,
				 double loop_count,
				 Cost *indexStartupCost,
				 Cost *indexTotalCost,
				 Selectivity *indexSelectivity,
				 double *indexCorrelation,
				 double *indexPages);
extern void gistcostestimate(struct PlannerInfo *root,
				 struct IndexPath *path,
				 double loop_count,
				 Cost *indexStartupCost,
				 Cost *indexTotalCost,
				 Selectivity *indexSelectivity,
				 double *indexCorrelation,
				 double *indexPages);
extern void spgcostestimate(struct PlannerInfo *root,
				struct IndexPath *path,
				double loop_count,
				Cost *indexStartupCost,
				Cost *indexTotalCost,
				Selectivity *indexSelectivity,
				double *indexCorrelation,
				double *indexPages);
extern void gincostestimate(struct PlannerInfo *root,
				struct IndexPath *path,
				double loop_count,
				Cost *indexStartupCost,
				Cost *indexTotalCost,
				Selectivity *indexSelectivity,
				double *indexCorrelation,
				double *indexPages);

#endif							/* INDEX_SELFUNCS_H */
