committsdesc.c

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/*-------------------------------------------------------------------------
 *
 * committsdesc.c
 *    rmgr descriptor routines for access/transam/commit_ts.c
 *
 * Portions Copyright (c) 1996-2023, 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"
#include "utils/timestamp.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, "%lld", (long long) pageno);
    }
    else if (info == COMMIT_TS_TRUNCATE)
    {
        xl_commit_ts_truncate *trunc = (xl_commit_ts_truncate *) rec;
 
        appendStringInfo(buf, "pageno %lld, oldestXid %u",
                         (long long) 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;
    }
}