1/*-------------------------------------------------------------------------
2 *
3 * committsdesc.c
4 * rmgr descriptor routines for access/transam/commit_ts.c
5 *
6 * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
7 * Portions Copyright (c) 1994, Regents of the University of California
8 *
9 *
10 * IDENTIFICATION
11 * src/backend/access/rmgrdesc/committsdesc.c
12 *
13 *-------------------------------------------------------------------------
14 */
15#include "postgres.h"
16
17#include "access/commit_ts.h"
18#include "utils/timestamp.h"
19
20
21void
22commit_ts_desc(StringInfo buf, XLogReaderState *record)
23{
24 char *rec = XLogRecGetData(record);
25 uint8 info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
26
27 if (info == COMMIT_TS_ZEROPAGE)
28 {
29 int pageno;
30
31 memcpy(&pageno, rec, sizeof(int));
32 appendStringInfo(buf, "%d", pageno);
33 }
34 else if (info == COMMIT_TS_TRUNCATE)
35 {
36 xl_commit_ts_truncate *trunc = (xl_commit_ts_truncate *) rec;
37
38 appendStringInfo(buf, "pageno %d, oldestXid %u",
39 trunc->pageno, trunc->oldestXid);
40 }
41 else if (info == COMMIT_TS_SETTS)
42 {
43 xl_commit_ts_set *xlrec = (xl_commit_ts_set *) rec;
44 int nsubxids;
45
46 appendStringInfo(buf, "set %s/%d for: %u",
47 timestamptz_to_str(xlrec->timestamp),
48 xlrec->nodeid,
49 xlrec->mainxid);
50 nsubxids = ((XLogRecGetDataLen(record) - SizeOfCommitTsSet) /
51 sizeof(TransactionId));
52 if (nsubxids > 0)
53 {
54 int i;
55 TransactionId *subxids;
56
57 subxids = palloc(sizeof(TransactionId) * nsubxids);
58 memcpy(subxids,
59 XLogRecGetData(record) + SizeOfCommitTsSet,
60 sizeof(TransactionId) * nsubxids);
61 for (i = 0; i < nsubxids; i++)
62 appendStringInfo(buf, ", %u", subxids[i]);
63 pfree(subxids);
64 }
65 }
66}
67
68const char *
69commit_ts_identify(uint8 info)
70{
71 switch (info)
72 {
73 case COMMIT_TS_ZEROPAGE:
74 return "ZEROPAGE";
75 case COMMIT_TS_TRUNCATE:
76 return "TRUNCATE";
77 case COMMIT_TS_SETTS:
78 return "SETTS";
79 default:
80 return NULL;
81 }
82}
83