committsdesc.c

Go to the documentation of this file.

/*-------------------------------------------------------------------------
 *
 * committsdesc.c
 *    rmgr descriptor routines for access/transam/commit_ts.c
 *
 * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 *
 * IDENTIFICATION
 *    src/backend/access/rmgrdesc/committsdesc.c
 *
 *-------------------------------------------------------------------------
 */
#include "postgres.h"
 
#include "access/commit_ts.h"
 
 
void
commit_ts_desc(StringInfo buf, XLogReaderState *record)
{
    char       *rec = XLogRecGetData(record);
    uint8       info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
 
    if (info == COMMIT_TS_ZEROPAGE)
    {
        int64       pageno;
 
        memcpy(&pageno, rec, sizeof(pageno));
        appendStringInfo(buf, "%" PRId64, pageno);
    }
    else if (info == COMMIT_TS_TRUNCATE)
    {
        xl_commit_ts_truncate *trunc = (xl_commit_ts_truncate *) rec;
 
        appendStringInfo(buf, "pageno %" PRId64 ", oldestXid %u",
                         trunc->pageno, trunc->oldestXid);
    }
}
 
const char *
commit_ts_identify(uint8 info)
{
    switch (info)
    {
        case COMMIT_TS_ZEROPAGE:
            return "ZEROPAGE";
        case COMMIT_TS_TRUNCATE:
            return "TRUNCATE";
        default:
            return NULL;
    }
}