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/*
* AM-callable functions for BRIN indexes
*
* Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* src/include/access/brin.h
*/
#ifndef BRIN_H
#define BRIN_H
#include "fmgr.h"
#include "nodes/execnodes.h"
#include "utils/relcache.h"
/*
* prototypes for functions in brin.c (external entry points for BRIN)
*/
extern Datum brinhandler(PG_FUNCTION_ARGS);
extern Datum brin_summarize_new_values(PG_FUNCTION_ARGS);
/*
* Storage type for BRIN's reloptions
*/
typedef struct BrinOptions
{
int32 vl_len_; /* varlena header (do not touch directly!) */
BlockNumber pagesPerRange;
} BrinOptions;
#define BRIN_DEFAULT_PAGES_PER_RANGE 128
#define BrinGetPagesPerRange(relation) \
((relation)->rd_options ? \
((BrinOptions *) (relation)->rd_options)->pagesPerRange : \
BRIN_DEFAULT_PAGES_PER_RANGE)
#endif /* BRIN_H */