spgdesc.c

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/*-------------------------------------------------------------------------
 *
 * spgdesc.c
 *    rmgr descriptor routines for access/spgist/spgxlog.c
 *
 * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 *
 * IDENTIFICATION
 *    src/backend/access/rmgrdesc/spgdesc.c
 *
 *-------------------------------------------------------------------------
 */
#include "postgres.h"

#include "access/spgxlog.h"

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

    switch (info)
    {
        case XLOG_SPGIST_ADD_LEAF:
            {
                spgxlogAddLeaf *xlrec = (spgxlogAddLeaf *) rec;

                appendStringInfoString(buf, "add leaf to page");
                appendStringInfo(buf, "; off %u; headoff %u; parentoff %u",
                                 xlrec->offnumLeaf, xlrec->offnumHeadLeaf,
                                 xlrec->offnumParent);
                if (xlrec->newPage)
                    appendStringInfoString(buf, " (newpage)");
                if (xlrec->storesNulls)
                    appendStringInfoString(buf, " (nulls)");
            }
            break;
        case XLOG_SPGIST_MOVE_LEAFS:
            appendStringInfo(buf, "%u leafs",
                             ((spgxlogMoveLeafs *) rec)->nMoves);
            break;
        case XLOG_SPGIST_ADD_NODE:
            appendStringInfo(buf, "off %u",
                             ((spgxlogAddNode *) rec)->offnum);
            break;
        case XLOG_SPGIST_SPLIT_TUPLE:
            appendStringInfo(buf, "prefix off: %u, postfix off: %u (same %d, new %d)",
                             ((spgxlogSplitTuple *) rec)->offnumPrefix,
                             ((spgxlogSplitTuple *) rec)->offnumPostfix,
                             ((spgxlogSplitTuple *) rec)->postfixBlkSame,
                             ((spgxlogSplitTuple *) rec)->newPage
                );
            break;
        case XLOG_SPGIST_PICKSPLIT:
            {
                spgxlogPickSplit *xlrec = (spgxlogPickSplit *) rec;

                appendStringInfo(buf, "ndel %u; nins %u",
                                 xlrec->nDelete, xlrec->nInsert);
                if (xlrec->innerIsParent)
                    appendStringInfoString(buf, " (innerIsParent)");
                if (xlrec->isRootSplit)
                    appendStringInfoString(buf, " (isRootSplit)");
            }
            break;
        case XLOG_SPGIST_VACUUM_LEAF:
            /* no further information */
            break;
        case XLOG_SPGIST_VACUUM_ROOT:
            /* no further information */
            break;
        case XLOG_SPGIST_VACUUM_REDIRECT:
            appendStringInfo(buf, "newest XID %u",
                             ((spgxlogVacuumRedirect *) rec)->newestRedirectXid);
            break;
    }
}

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

    switch (info & ~XLR_INFO_MASK)
    {
        case XLOG_SPGIST_ADD_LEAF:
            id = "ADD_LEAF";
            break;
        case XLOG_SPGIST_MOVE_LEAFS:
            id = "MOVE_LEAFS";
            break;
        case XLOG_SPGIST_ADD_NODE:
            id = "ADD_NODE";
            break;
        case XLOG_SPGIST_SPLIT_TUPLE:
            id = "SPLIT_TUPLE";
            break;
        case XLOG_SPGIST_PICKSPLIT:
            id = "PICKSPLIT";
            break;
        case XLOG_SPGIST_VACUUM_LEAF:
            id = "VACUUM_LEAF";
            break;
        case XLOG_SPGIST_VACUUM_ROOT:
            id = "VACUUM_ROOT";
            break;
        case XLOG_SPGIST_VACUUM_REDIRECT:
            id = "VACUUM_REDIRECT";
            break;
    }

    return id;
}