clogdesc.c

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/*-------------------------------------------------------------------------
 *
 * clogdesc.c
 *    rmgr descriptor routines for access/transam/clog.c
 *
 * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 *
 * IDENTIFICATION
 *    src/backend/access/rmgrdesc/clogdesc.c
 *
 *-------------------------------------------------------------------------
 */
#include "postgres.h"

#include "access/clog.h"


void
clog_desc(StringInfo buf, uint8 xl_info, char *rec)
{
    uint8       info = xl_info & ~XLR_INFO_MASK;

    if (info == CLOG_ZEROPAGE)
    {
        int         pageno;

        memcpy(&pageno, rec, sizeof(int));
        appendStringInfo(buf, "zeropage: %d", pageno);
    }
    else if (info == CLOG_TRUNCATE)
    {
        int         pageno;

        memcpy(&pageno, rec, sizeof(int));
        appendStringInfo(buf, "truncate before: %d", pageno);
    }
    else
        appendStringInfo(buf, "UNKNOWN");
}