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/*
* brin_revmap.h
* Prototypes for BRIN reverse range maps
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* src/include/access/brin_revmap.h
*/
#ifndef BRIN_REVMAP_H
#define BRIN_REVMAP_H
#include "access/brin_tuple.h"
#include "storage/block.h"
#include "storage/buf.h"
#include "storage/itemptr.h"
#include "storage/off.h"
#include "utils/relcache.h"
#include "utils/snapshot.h"
/* struct definition lives in brin_revmap.c */
typedef struct BrinRevmap BrinRevmap;
extern BrinRevmap *brinRevmapInitialize(Relation idxrel,
BlockNumber *pagesPerRange, Snapshot snapshot);
extern void brinRevmapTerminate(BrinRevmap *revmap);
extern void brinRevmapExtend(BrinRevmap *revmap,
BlockNumber heapBlk);
extern Buffer brinLockRevmapPageForUpdate(BrinRevmap *revmap,
BlockNumber heapBlk);
extern void brinSetHeapBlockItemptr(Buffer buf, BlockNumber pagesPerRange,
BlockNumber heapBlk, ItemPointerData tid);
extern BrinTuple *brinGetTupleForHeapBlock(BrinRevmap *revmap,
BlockNumber heapBlk, Buffer *buf, OffsetNumber *off,
Size *size, int mode, Snapshot snapshot);
extern bool brinRevmapDesummarizeRange(Relation idxrel, BlockNumber heapBlk);
#endif /* BRIN_REVMAP_H */
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