gistdesc.c

Go to the documentation of this file.

/*-------------------------------------------------------------------------
 *
 * gistdesc.c
 *    rmgr descriptor routines for access/gist/gistxlog.c
 *
 * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 *
 * IDENTIFICATION
 *    src/backend/access/rmgrdesc/gistdesc.c
 *
 *-------------------------------------------------------------------------
 */
#include "postgres.h"

#include "access/gist_private.h"
#include "lib/stringinfo.h"
#include "storage/relfilenode.h"

static void
out_gistxlogPageUpdate(StringInfo buf, gistxlogPageUpdate *xlrec)
{
}

static void
out_gistxlogPageSplit(StringInfo buf, gistxlogPageSplit *xlrec)
{
    appendStringInfo(buf, "page_split: splits to %d pages",
                     xlrec->npage);
}

void
gist_desc(StringInfo buf, XLogReaderState *record)
{
    char       *rec = XLogRecGetData(record);
    uint8       info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;

    switch (info)
    {
        case XLOG_GIST_PAGE_UPDATE:
            out_gistxlogPageUpdate(buf, (gistxlogPageUpdate *) rec);
            break;
        case XLOG_GIST_PAGE_SPLIT:
            out_gistxlogPageSplit(buf, (gistxlogPageSplit *) rec);
            break;
        case XLOG_GIST_CREATE_INDEX:
            break;
    }
}

const char *
gist_identify(uint8 info)
{
    const char *id = NULL;

    switch (info & ~XLR_INFO_MASK)
    {
        case XLOG_GIST_PAGE_UPDATE:
            id = "PAGE_UPDATE";
            break;
        case XLOG_GIST_PAGE_SPLIT:
            id = "PAGE_SPLIT";
            break;
        case XLOG_GIST_CREATE_INDEX:
            id = "CREATE_INDEX";
            break;
    }

    return id;
}