1/*-------------------------------------------------------------------------
2 *
3 * freespace.h
4 * POSTGRES free space map for quickly finding free space in relations
5 *
6 *
7 * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
8 * Portions Copyright (c) 1994, Regents of the University of California
9 *
10 * src/include/storage/freespace.h
11 *
12 *-------------------------------------------------------------------------
13 */
14#ifndef FREESPACE_H_
15#define FREESPACE_H_
16
17#include "storage/block.h"
18#include "storage/relfilenode.h"
19#include "utils/relcache.h"
20
21/* prototypes for public functions in freespace.c */
22extern Size GetRecordedFreeSpace(Relation rel, BlockNumber heapBlk);
23extern BlockNumber GetPageWithFreeSpace(Relation rel, Size spaceNeeded);
24extern BlockNumber RecordAndGetPageWithFreeSpace(Relation rel,
25 BlockNumber oldPage,
26 Size oldSpaceAvail,
27 Size spaceNeeded);
28extern void RecordPageWithFreeSpace(Relation rel, BlockNumber heapBlk,
29 Size spaceAvail);
30extern void XLogRecordPageWithFreeSpace(RelFileNode rnode, BlockNumber heapBlk,
31 Size spaceAvail);
32
33extern void FreeSpaceMapTruncateRel(Relation rel, BlockNumber nblocks);
34extern void FreeSpaceMapVacuum(Relation rel);
35extern void FreeSpaceMapVacuumRange(Relation rel, BlockNumber start,
36 BlockNumber end);
37
38#endif /* FREESPACE_H_ */
39