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e0ee642 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | /*-------------------------------------------------------------------------
*
* freespace.h
* POSTGRES free space map for quickly finding free space in relations
*
*
* Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/storage/freespace.h
*
*-------------------------------------------------------------------------
*/
#ifndef FREESPACE_H_
#define FREESPACE_H_
#include "storage/block.h"
#include "storage/relfilelocator.h"
#include "utils/relcache.h"
/* prototypes for public functions in freespace.c */
extern Size GetRecordedFreeSpace(Relation rel, BlockNumber heapBlk);
extern BlockNumber GetPageWithFreeSpace(Relation rel, Size spaceNeeded);
extern BlockNumber RecordAndGetPageWithFreeSpace(Relation rel,
BlockNumber oldPage,
Size oldSpaceAvail,
Size spaceNeeded);
extern void RecordPageWithFreeSpace(Relation rel, BlockNumber heapBlk,
Size spaceAvail);
extern void XLogRecordPageWithFreeSpace(RelFileLocator rlocator, BlockNumber heapBlk,
Size spaceAvail);
extern BlockNumber FreeSpaceMapPrepareTruncateRel(Relation rel,
BlockNumber nblocks);
extern void FreeSpaceMapVacuum(Relation rel);
extern void FreeSpaceMapVacuumRange(Relation rel, BlockNumber start,
BlockNumber end);
#endif /* FREESPACE_H_ */
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