PostgreSQL Source Code: src/include/storage/freespace.h Source File

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freespace.h
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1/*-------------------------------------------------------------------------
2 *
3 * freespace.h
4 * POSTGRES free space map for quickly finding free space in relations
5 *
6 *
7 * Portions Copyright (c) 1996-2025, 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/relfilelocator.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(RelFileLocator rlocator, BlockNumber heapBlk,
31 Size spaceAvail);
32
33extern BlockNumber FreeSpaceMapPrepareTruncateRel(Relation rel,
34 BlockNumber nblocks);
35extern void FreeSpaceMapVacuum(Relation rel);
36extern void FreeSpaceMapVacuumRange(Relation rel, BlockNumber start,
37 BlockNumber end);
38
39#endif /* FREESPACE_H_ */
uint32 BlockNumber
Definition: block.h:31
size_t Size
Definition: c.h:610
void FreeSpaceMapVacuumRange(Relation rel, BlockNumber start, BlockNumber end)
Definition: freespace.c:377
BlockNumber RecordAndGetPageWithFreeSpace(Relation rel, BlockNumber oldPage, Size oldSpaceAvail, Size spaceNeeded)
Definition: freespace.c:154
void FreeSpaceMapVacuum(Relation rel)
Definition: freespace.c:358
Size GetRecordedFreeSpace(Relation rel, BlockNumber heapBlk)
Definition: freespace.c:244
void RecordPageWithFreeSpace(Relation rel, BlockNumber heapBlk, Size spaceAvail)
Definition: freespace.c:194
void XLogRecordPageWithFreeSpace(RelFileLocator rlocator, BlockNumber heapBlk, Size spaceAvail)
Definition: freespace.c:211
BlockNumber GetPageWithFreeSpace(Relation rel, Size spaceNeeded)
Definition: freespace.c:137
BlockNumber FreeSpaceMapPrepareTruncateRel(Relation rel, BlockNumber nblocks)
Definition: freespace.c:275
return str start
Definition: rel.h:56

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