smgrdesc.c

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/*-------------------------------------------------------------------------
 *
 * smgrdesc.c
 *    rmgr descriptor routines for catalog/storage.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/smgrdesc.c
 *
 *-------------------------------------------------------------------------
 */
#include "postgres.h"

#include "catalog/catalog.h"
#include "catalog/storage_xlog.h"
#include "common/relpath.h"


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

    if (info == XLOG_SMGR_CREATE)
    {
        xl_smgr_create *xlrec = (xl_smgr_create *) rec;
        char       *path = relpathperm(xlrec->rnode, xlrec->forkNum);

        appendStringInfo(buf, "file create: %s", path);
        pfree(path);
    }
    else if (info == XLOG_SMGR_TRUNCATE)
    {
        xl_smgr_truncate *xlrec = (xl_smgr_truncate *) rec;
        char       *path = relpathperm(xlrec->rnode, MAIN_FORKNUM);

        appendStringInfo(buf, "file truncate: %s to %u blocks", path,
                         xlrec->blkno);
        pfree(path);
    }
    else
        appendStringInfo(buf, "UNKNOWN");
}