mirror of
https://github.com/MariaDB/server.git
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120 lines
3.5 KiB
C
120 lines
3.5 KiB
C
/* Copyright (C) 2006 MySQL AB & Ramil Kalimullin
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
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#include "maria_def.h"
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#include "trnman.h"
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#include "ma_key_recover.h"
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#ifdef HAVE_RTREE_KEYS
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#include "ma_rt_index.h"
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#include "ma_rt_key.h"
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#include "ma_rt_mbr.h"
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/*
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Add key to the page
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RESULT VALUES
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-1 Error
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0 Not split
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1 Split
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*/
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int maria_rtree_add_key(const MARIA_KEY *key, MARIA_PAGE *page,
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my_off_t *new_page)
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{
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MARIA_HA *info= page->info;
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MARIA_SHARE *share= info->s;
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uint page_size= page->size;
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uint nod_flag= page->node;
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uchar *key_pos= rt_PAGE_END(page);
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uint tot_key_length= key->data_length + key->ref_length + nod_flag;
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DBUG_ENTER("maria_rtree_add_key");
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if (page_size + tot_key_length <=
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(uint)(key->keyinfo->block_length - KEYPAGE_CHECKSUM_SIZE))
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{
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/* split won't be necessary */
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if (nod_flag)
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{
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DBUG_ASSERT(_ma_kpos(nod_flag, key->data) <
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info->state->key_file_length);
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/* We don't store reference to row on nod pages for rtree index */
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tot_key_length-= key->ref_length;
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}
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/* save key */
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memcpy(key_pos, key->data - nod_flag, tot_key_length);
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page->size+= tot_key_length;
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page_store_size(share, page);
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if (share->now_transactional &&
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_ma_log_add(page, (uint)(key_pos - page->buff),
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key_pos, tot_key_length, tot_key_length, 0,
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KEY_OP_DEBUG_LOG_ADD_1))
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DBUG_RETURN(-1);
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DBUG_RETURN(0);
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}
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DBUG_RETURN(maria_rtree_split_page(key, page, new_page) ? -1 : 1);
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}
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/*
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Delete key from the page
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Notes
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key_length is only the data part of the key
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*/
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int maria_rtree_delete_key(MARIA_PAGE *page, uchar *key, uint key_length)
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{
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MARIA_HA *info= page->info;
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MARIA_SHARE *share= info->s;
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uint key_length_with_nod_flag;
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uchar *key_start;
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key_start= key - page->node;
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if (!page->node)
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key_length+= share->base.rec_reflength;
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memmove(key_start, key + key_length, page->size - key_length -
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(key - page->buff));
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key_length_with_nod_flag= key_length + page->node;
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page->size-= key_length_with_nod_flag;
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page_store_size(share, page);
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if (share->now_transactional &&
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_ma_log_delete(page, key_start, 0, key_length_with_nod_flag,
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0, KEY_OP_DEBUG_LOG_DEL_CHANGE_RT))
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return -1;
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return 0;
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}
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/*
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Calculate and store key MBR into *key.
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*/
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int maria_rtree_set_key_mbr(MARIA_HA *info, MARIA_KEY *key,
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my_off_t child_page)
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{
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MARIA_PAGE page;
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DBUG_ENTER("maria_rtree_set_key_mbr");
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if (_ma_fetch_keypage(&page, info, key->keyinfo, child_page,
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PAGECACHE_LOCK_LEFT_UNLOCKED,
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DFLT_INIT_HITS, info->buff, 0))
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DBUG_RETURN(-1);
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DBUG_RETURN(maria_rtree_page_mbr(key->keyinfo->seg,
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&page, key->data, key->data_length));
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}
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#endif /*HAVE_RTREE_KEYS*/
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