brindesc.c

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/*-------------------------------------------------------------------------
 *
 * brindesc.c
 *    rmgr descriptor routines for BRIN indexes
 *
 * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 *
 * IDENTIFICATION
 *    src/backend/access/rmgrdesc/brindesc.c
 *
 *-------------------------------------------------------------------------
 */
#include "postgres.h"
 
#include "access/brin_xlog.h"
 
void
brin_desc(StringInfo buf, XLogReaderState *record)
{
    char       *rec = XLogRecGetData(record);
    uint8       info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
 
    info &= XLOG_BRIN_OPMASK;
    if (info == XLOG_BRIN_CREATE_INDEX)
    {
        xl_brin_createidx *xlrec = (xl_brin_createidx *) rec;
 
        appendStringInfo(buf, "v%d pagesPerRange %u",
                         xlrec->version, xlrec->pagesPerRange);
    }
    else if (info == XLOG_BRIN_INSERT)
    {
        xl_brin_insert *xlrec = (xl_brin_insert *) rec;
 
        appendStringInfo(buf, "heapBlk %u pagesPerRange %u offnum %u",
                         xlrec->heapBlk,
                         xlrec->pagesPerRange,
                         xlrec->offnum);
    }
    else if (info == XLOG_BRIN_UPDATE)
    {
        xl_brin_update *xlrec = (xl_brin_update *) rec;
 
        appendStringInfo(buf, "heapBlk %u pagesPerRange %u old offnum %u, new offnum %u",
                         xlrec->insert.heapBlk,
                         xlrec->insert.pagesPerRange,
                         xlrec->oldOffnum,
                         xlrec->insert.offnum);
    }
    else if (info == XLOG_BRIN_SAMEPAGE_UPDATE)
    {
        xl_brin_samepage_update *xlrec = (xl_brin_samepage_update *) rec;
 
        appendStringInfo(buf, "offnum %u", xlrec->offnum);
    }
    else if (info == XLOG_BRIN_REVMAP_EXTEND)
    {
        xl_brin_revmap_extend *xlrec = (xl_brin_revmap_extend *) rec;
 
        appendStringInfo(buf, "targetBlk %u", xlrec->targetBlk);
    }
    else if (info == XLOG_BRIN_DESUMMARIZE)
    {
        xl_brin_desummarize *xlrec = (xl_brin_desummarize *) rec;
 
        appendStringInfo(buf, "pagesPerRange %u, heapBlk %u, page offset %u",
                         xlrec->pagesPerRange, xlrec->heapBlk, xlrec->regOffset);
    }
}
 
const char *
brin_identify(uint8 info)
{
    const char *id = NULL;
 
    switch (info & ~XLR_INFO_MASK)
    {
        case XLOG_BRIN_CREATE_INDEX:
            id = "CREATE_INDEX";
            break;
        case XLOG_BRIN_INSERT:
            id = "INSERT";
            break;
        case XLOG_BRIN_INSERT | XLOG_BRIN_INIT_PAGE:
            id = "INSERT+INIT";
            break;
        case XLOG_BRIN_UPDATE:
            id = "UPDATE";
            break;
        case XLOG_BRIN_UPDATE | XLOG_BRIN_INIT_PAGE:
            id = "UPDATE+INIT";
            break;
        case XLOG_BRIN_SAMEPAGE_UPDATE:
            id = "SAMEPAGE_UPDATE";
            break;
        case XLOG_BRIN_REVMAP_EXTEND:
            id = "REVMAP_EXTEND";
            break;
        case XLOG_BRIN_DESUMMARIZE:
            id = "DESUMMARIZE";
            break;
    }
 
    return id;
}