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hio.h
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1/*-------------------------------------------------------------------------
2 *
3 * hio.h
4 * POSTGRES heap access method input/output definitions.
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/access/hio.h
11 *
12 *-------------------------------------------------------------------------
13 */
14#ifndef HIO_H
15#define HIO_H
16
17#include "access/htup.h"
18#include "storage/buf.h"
19#include "utils/relcache.h"
20
21/*
22 * state for bulk inserts --- private to heapam.c and hio.c
23 *
24 * If current_buf isn't InvalidBuffer, then we are holding an extra pin
25 * on that buffer.
26 *
27 * "typedef struct BulkInsertStateData *BulkInsertState" is in heapam.h
28 */
29typedef struct BulkInsertStateData
30{
31 BufferAccessStrategy strategy; /* our BULKWRITE strategy object */
32 Buffer current_buf; /* current insertion target page */
33
34 /*
35 * State for bulk extensions.
36 *
37 * last_free..next_free are further pages that were unused at the time of
38 * the last extension. They might be in use by the time we use them
39 * though, so rechecks are needed.
40 *
41 * XXX: Eventually these should probably live in RelationData instead,
42 * alongside targetblock.
43 *
44 * already_extended_by is the number of pages that this bulk inserted
45 * extended by. If we already extended by a significant number of pages,
46 * we can be more aggressive about extending going forward.
47 */
52
53
54extern void RelationPutHeapTuple(Relation relation, Buffer buffer,
55 HeapTuple tuple, bool token);
57 Buffer otherBuffer, int options,
58 BulkInsertStateData *bistate,
59 Buffer *vmbuffer, Buffer *vmbuffer_other,
60 int num_pages);
61
62#endif /* HIO_H */
uint32 BlockNumber
Definition: block.h:31
int Buffer
Definition: buf.h:23
uint32_t uint32
Definition: c.h:488
size_t Size
Definition: c.h:562
Buffer RelationGetBufferForTuple(Relation relation, Size len, Buffer otherBuffer, int options, BulkInsertStateData *bistate, Buffer *vmbuffer, Buffer *vmbuffer_other, int num_pages)
void RelationPutHeapTuple(Relation relation, Buffer buffer, HeapTuple tuple, bool token)
Definition: hio.c:35
struct BulkInsertStateData BulkInsertStateData
#define token
Definition: indent_globs.h:126
const void size_t len
BlockNumber last_free
Definition: hio.h:49
BufferAccessStrategy strategy
Definition: hio.h:31
uint32 already_extended_by
Definition: hio.h:50
BlockNumber next_free
Definition: hio.h:48
Buffer current_buf
Definition: hio.h:32