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