src/backend/access/rmgrdesc/committsdesc.c

   1 /*-------------------------------------------------------------------------
   2  *
   3  * committsdesc.c
   4  *        rmgr descriptor routines for access/transam/commit_ts.c
   5  *
   6  * Portions Copyright (c) 1996-2022, 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
  21 void
  22 commit_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 }
  42
  43 const char *
  44 commit_ts_identify(uint8 info)
  45 {
  46         switch (info)
  47         {
  48                 case COMMIT_TS_ZEROPAGE:
  49                         return "ZEROPAGE";
  50                 case COMMIT_TS_TRUNCATE:
  51                         return "TRUNCATE";
  52                 default:
  53                         return NULL;
  54         }
  55 }