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
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
/*
* commit_ts.h
*
* PostgreSQL commit timestamp manager
*
* Portions Copyright (c) 1996-2014, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/access/commit_ts.h
*/
#ifndef COMMIT_TS_H
#define COMMIT_TS_H
#include "access/xlog.h"
#include "datatype/timestamp.h"
#include "utils/guc.h"
extern PGDLLIMPORT bool track_commit_timestamp;
extern bool check_track_commit_timestamp(bool *newval, void **extra,
GucSource source);
typedef uint32 CommitTsNodeId;
#define InvalidCommitTsNodeId 0
extern void CommitTsSetDefaultNodeId(CommitTsNodeId nodeid);
extern CommitTsNodeId CommitTsGetDefaultNodeId(void);
extern void TransactionTreeSetCommitTsData(TransactionId xid, int nsubxids,
TransactionId *subxids, TimestampTz timestamp,
CommitTsNodeId nodeid, bool do_xlog);
extern bool TransactionIdGetCommitTsData(TransactionId xid,
TimestampTz *ts, CommitTsNodeId *nodeid);
extern TransactionId GetLatestCommitTsData(TimestampTz *ts,
CommitTsNodeId *nodeid);
extern Size CommitTsShmemBuffers(void);
extern Size CommitTsShmemSize(void);
extern void CommitTsShmemInit(void);
extern void BootStrapCommitTs(void);
extern void StartupCommitTs(void);
extern void CompleteCommitTsInitialization(void);
extern void ShutdownCommitTs(void);
extern void CheckPointCommitTs(void);
extern void ExtendCommitTs(TransactionId newestXact);
extern void TruncateCommitTs(TransactionId oldestXact);
extern void SetCommitTsLimit(TransactionId oldestXact,
TransactionId newestXact);
extern void AdvanceOldestCommitTs(TransactionId oldestXact);
/* XLOG stuff */
#define COMMIT_TS_ZEROPAGE 0x00
#define COMMIT_TS_TRUNCATE 0x10
#define COMMIT_TS_SETTS 0x20
typedef struct xl_commit_ts_set
{
TimestampTz timestamp;
CommitTsNodeId nodeid;
TransactionId mainxid;
/* subxact Xids follow */
} xl_commit_ts_set;
#define SizeOfCommitTsSet (offsetof(xl_commit_ts_set, mainxid) + \
sizeof(TransactionId))
extern void commit_ts_redo(XLogReaderState *record);
extern void commit_ts_desc(StringInfo buf, XLogReaderState *record);
extern const char *commit_ts_identify(uint8 info);
#endif /* COMMITTS_H */
|
