hashdesc.c

Go to the documentation of this file.

/*-------------------------------------------------------------------------
 *
 * hashdesc.c
 *    rmgr descriptor routines for access/hash/hash.c
 *
 * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 *
 * IDENTIFICATION
 *    src/backend/access/rmgrdesc/hashdesc.c
 *
 *-------------------------------------------------------------------------
 */
#include "postgres.h"
 
#include "access/hash_xlog.h"
 
void
hash_desc(StringInfo buf, XLogReaderState *record)
{
    char       *rec = XLogRecGetData(record);
    uint8       info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
 
    switch (info)
    {
        case XLOG_HASH_INIT_META_PAGE:
            {
                xl_hash_init_meta_page *xlrec = (xl_hash_init_meta_page *) rec;
 
                appendStringInfo(buf, "num_tuples %g, fillfactor %d",
                                 xlrec->num_tuples, xlrec->ffactor);
                break;
            }
        case XLOG_HASH_INIT_BITMAP_PAGE:
            {
                xl_hash_init_bitmap_page *xlrec = (xl_hash_init_bitmap_page *) rec;
 
                appendStringInfo(buf, "bmsize %d", xlrec->bmsize);
                break;
            }
        case XLOG_HASH_INSERT:
            {
                xl_hash_insert *xlrec = (xl_hash_insert *) rec;
 
                appendStringInfo(buf, "off %u", xlrec->offnum);
                break;
            }
        case XLOG_HASH_ADD_OVFL_PAGE:
            {
                xl_hash_add_ovfl_page *xlrec = (xl_hash_add_ovfl_page *) rec;
 
                appendStringInfo(buf, "bmsize %d, bmpage_found %c",
                                 xlrec->bmsize, (xlrec->bmpage_found) ? 'T' : 'F');
                break;
            }
        case XLOG_HASH_SPLIT_ALLOCATE_PAGE:
            {
                xl_hash_split_allocate_page *xlrec = (xl_hash_split_allocate_page *) rec;
 
                appendStringInfo(buf, "new_bucket %u, meta_page_masks_updated %c, issplitpoint_changed %c",
                                 xlrec->new_bucket,
                                 (xlrec->flags & XLH_SPLIT_META_UPDATE_MASKS) ? 'T' : 'F',
                                 (xlrec->flags & XLH_SPLIT_META_UPDATE_SPLITPOINT) ? 'T' : 'F');
                break;
            }
        case XLOG_HASH_SPLIT_COMPLETE:
            {
                xl_hash_split_complete *xlrec = (xl_hash_split_complete *) rec;
 
                appendStringInfo(buf, "old_bucket_flag %u, new_bucket_flag %u",
                                 xlrec->old_bucket_flag, xlrec->new_bucket_flag);
                break;
            }
        case XLOG_HASH_MOVE_PAGE_CONTENTS:
            {
                xl_hash_move_page_contents *xlrec = (xl_hash_move_page_contents *) rec;
 
                appendStringInfo(buf, "ntups %d, is_primary %c",
                                 xlrec->ntups,
                                 xlrec->is_prim_bucket_same_wrt ? 'T' : 'F');
                break;
            }
        case XLOG_HASH_SQUEEZE_PAGE:
            {
                xl_hash_squeeze_page *xlrec = (xl_hash_squeeze_page *) rec;
 
                appendStringInfo(buf, "prevblkno %u, nextblkno %u, ntups %d, is_primary %c",
                                 xlrec->prevblkno,
                                 xlrec->nextblkno,
                                 xlrec->ntups,
                                 xlrec->is_prim_bucket_same_wrt ? 'T' : 'F');
                break;
            }
        case XLOG_HASH_DELETE:
            {
                xl_hash_delete *xlrec = (xl_hash_delete *) rec;
 
                appendStringInfo(buf, "clear_dead_marking %c, is_primary %c",
                                 xlrec->clear_dead_marking ? 'T' : 'F',
                                 xlrec->is_primary_bucket_page ? 'T' : 'F');
                break;
            }
        case XLOG_HASH_UPDATE_META_PAGE:
            {
                xl_hash_update_meta_page *xlrec = (xl_hash_update_meta_page *) rec;
 
                appendStringInfo(buf, "ntuples %g",
                                 xlrec->ntuples);
                break;
            }
        case XLOG_HASH_VACUUM_ONE_PAGE:
            {
                xl_hash_vacuum_one_page *xlrec = (xl_hash_vacuum_one_page *) rec;
 
                appendStringInfo(buf, "ntuples %d, snapshotConflictHorizon %u, isCatalogRel %c",
                                 xlrec->ntuples,
                                 xlrec->snapshotConflictHorizon,
                                 xlrec->isCatalogRel ? 'T' : 'F');
                break;
            }
    }
}
 
const char *
hash_identify(uint8 info)
{
    const char *id = NULL;
 
    switch (info & ~XLR_INFO_MASK)
    {
        case XLOG_HASH_INIT_META_PAGE:
            id = "INIT_META_PAGE";
            break;
        case XLOG_HASH_INIT_BITMAP_PAGE:
            id = "INIT_BITMAP_PAGE";
            break;
        case XLOG_HASH_INSERT:
            id = "INSERT";
            break;
        case XLOG_HASH_ADD_OVFL_PAGE:
            id = "ADD_OVFL_PAGE";
            break;
        case XLOG_HASH_SPLIT_ALLOCATE_PAGE:
            id = "SPLIT_ALLOCATE_PAGE";
            break;
        case XLOG_HASH_SPLIT_PAGE:
            id = "SPLIT_PAGE";
            break;
        case XLOG_HASH_SPLIT_COMPLETE:
            id = "SPLIT_COMPLETE";
            break;
        case XLOG_HASH_MOVE_PAGE_CONTENTS:
            id = "MOVE_PAGE_CONTENTS";
            break;
        case XLOG_HASH_SQUEEZE_PAGE:
            id = "SQUEEZE_PAGE";
            break;
        case XLOG_HASH_DELETE:
            id = "DELETE";
            break;
        case XLOG_HASH_SPLIT_CLEANUP:
            id = "SPLIT_CLEANUP";
            break;
        case XLOG_HASH_UPDATE_META_PAGE:
            id = "UPDATE_META_PAGE";
            break;
        case XLOG_HASH_VACUUM_ONE_PAGE:
            id = "VACUUM_ONE_PAGE";
    }
 
    return id;
}