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/* Copyright (C) 2006 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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 "ma_fulltext.h"
#include "ma_rt_index.h"
#include "trnman.h"
/**
Update an old row in a MARIA table
*/
int maria_update(register MARIA_HA *info, const uchar *oldrec,
const uchar *newrec)
{
int flag,key_changed,save_errno;
reg3 my_off_t pos;
uint i;
uchar old_key_buff[MARIA_MAX_KEY_BUFF], *UNINIT_VAR(new_key_buff);
my_bool auto_key_changed= 0;
ulonglong UNINIT_VAR(changed);
MARIA_SHARE *share= info->s;
MARIA_KEYDEF *keyinfo;
DBUG_ENTER("maria_update");
DBUG_EXECUTE_IF("maria_pretend_crashed_table_on_usage",
_ma_print_error(info, HA_ERR_CRASHED, 0);
DBUG_RETURN(my_errno= HA_ERR_CRASHED););
if (!(info->update & HA_STATE_AKTIV))
{
DBUG_RETURN(my_errno=HA_ERR_KEY_NOT_FOUND);
}
if (share->options & HA_OPTION_READ_ONLY_DATA)
{
DBUG_RETURN(my_errno=EACCES);
}
if (share->state.state.key_file_length >= share->base.margin_key_file_length)
{
DBUG_RETURN(my_errno=HA_ERR_INDEX_FILE_FULL);
}
pos= info->cur_row.lastpos;
if (_ma_readinfo(info,F_WRLCK,1))
DBUG_RETURN(my_errno);
if ((*share->compare_record)(info,oldrec))
{
save_errno= my_errno;
DBUG_PRINT("warning", ("Got error from compare record"));
goto err_end; /* Record has changed */
}
/* Calculate and check all unique constraints */
key_changed=0;
for (i=0 ; i < share->state.header.uniques ; i++)
{
MARIA_UNIQUEDEF *def=share->uniqueinfo+i;
if (_ma_unique_comp(def, newrec, oldrec,1) &&
_ma_check_unique(info, def, newrec, _ma_unique_hash(def, newrec),
pos))
{
save_errno=my_errno;
goto err_end;
}
}
if (_ma_mark_file_changed(share))
{
save_errno=my_errno;
goto err_end;
}
/* Ensure we don't try to restore auto_increment if it doesn't change */
info->last_auto_increment= ~(ulonglong) 0;
/* Check which keys changed from the original row */
new_key_buff= info->lastkey_buff2;
changed=0;
for (i=0, keyinfo= share->keyinfo ; i < share->base.keys ; i++, keyinfo++)
{
if (maria_is_key_active(share->state.key_map, i))
{
if (keyinfo->flag & HA_FULLTEXT )
{
if (_ma_ft_cmp(info,i,oldrec, newrec))
{
if ((int) i == info->lastinx)
{
/*
We are changeing the index we are reading on. Mark that
the index data has changed and we need to do a full search
when doing read-next
*/
key_changed|=HA_STATE_WRITTEN;
}
changed|=((ulonglong) 1 << i);
if (_ma_ft_update(info,i,old_key_buff,oldrec,newrec,pos))
goto err;
}
}
else
{
MARIA_KEY new_key, old_key;
(*keyinfo->make_key)(info,&new_key, i, new_key_buff, newrec,
pos, info->trn->trid);
(*keyinfo->make_key)(info,&old_key, i, old_key_buff,
oldrec, pos, info->cur_row.trid);
/* The above changed info->lastkey2. Inform maria_rnext_same(). */
info->update&= ~HA_STATE_RNEXT_SAME;
if (new_key.data_length != old_key.data_length ||
memcmp(old_key.data, new_key.data, new_key.data_length))
{
if ((int) i == info->lastinx)
key_changed|=HA_STATE_WRITTEN; /* Mark that keyfile changed */
changed|=((ulonglong) 1 << i);
keyinfo->version++;
if (keyinfo->ck_delete(info,&old_key))
goto err;
if (keyinfo->ck_insert(info,&new_key))
goto err;
if (share->base.auto_key == i+1)
auto_key_changed=1;
}
}
}
}
if (share->calc_checksum)
{
/*
We can't use the row based checksum as this doesn't have enough
precision (one byte, while the table's is more bytes).
At least _ma_check_unique() modifies the 'newrec' record, so checksum
has to be computed _after_ it. Nobody apparently modifies 'oldrec'.
We need to pass the old row's checksum down to (*update_record)(), we do
this via info->new_row.checksum (not intuitive but existing code
mandated that cur_row is the new row).
If (*update_record)() fails, table will be marked corrupted so no need
to revert the live checksum change.
*/
info->cur_row.checksum= (*share->calc_checksum)(info, newrec);
info->new_row.checksum= (*share->calc_checksum)(info, oldrec);
info->state->checksum+= info->cur_row.checksum - info->new_row.checksum;
}
if ((*share->update_record)(info, pos, oldrec, newrec))
goto err;
if (auto_key_changed & !share->now_transactional)
{
const HA_KEYSEG *keyseg= share->keyinfo[share->base.auto_key-1].seg;
const uchar *key= newrec + keyseg->start;
set_if_bigger(share->state.auto_increment,
ma_retrieve_auto_increment(key, keyseg->type));
}
/*
We can't yet have HA_STATE_AKTIV here, as block_record dosn't support it
*/
info->update= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED | key_changed);
info->row_changes++;
share->state.changed|= STATE_NOT_MOVABLE | STATE_NOT_ZEROFILLED;
info->state->changed= 1;
/*
Every Maria function that updates Maria table must end with
call to _ma_writeinfo(). If operation (second param of
_ma_writeinfo()) is not 0 it sets share->changed to 1, that is
flags that data has changed. If operation is 0, this function
equals to no-op in this case.
ma_update() must always pass !0 value as operation, since even if
there is no index change there could be data change.
*/
_ma_writeinfo(info, WRITEINFO_UPDATE_KEYFILE);
if (info->invalidator != 0)
{
DBUG_PRINT("info", ("invalidator... '%s' (update)",
share->open_file_name.str));
(*info->invalidator)(share->open_file_name.str);
info->invalidator=0;
}
DBUG_RETURN(0);
err:
DBUG_PRINT("error",("key: %d errno: %d",i,my_errno));
save_errno= my_errno;
DBUG_ASSERT(save_errno);
if (!save_errno)
save_errno= HA_ERR_INTERNAL_ERROR; /* Should never happen */
if (my_errno == HA_ERR_FOUND_DUPP_KEY || my_errno == HA_ERR_OUT_OF_MEM ||
my_errno == HA_ERR_RECORD_FILE_FULL)
{
info->errkey= (int) i;
flag=0;
do
{
if (((ulonglong) 1 << i) & changed)
{
if (share->keyinfo[i].flag & HA_FULLTEXT)
{
if ((flag++ && _ma_ft_del(info,i,new_key_buff,newrec,pos)) ||
_ma_ft_add(info,i,old_key_buff,oldrec,pos))
{
_ma_set_fatal_error(info, my_errno);
break;
}
}
else
{
MARIA_KEY new_key, old_key;
(*share->keyinfo[i].make_key)(info, &new_key, i, new_key_buff,
newrec, pos,
info->trn->trid);
(*share->keyinfo[i].make_key)(info, &old_key, i, old_key_buff,
oldrec, pos, info->cur_row.trid);
if ((flag++ && _ma_ck_delete(info, &new_key)) ||
_ma_ck_write(info, &old_key))
{
_ma_set_fatal_error(info, my_errno);
break;
}
}
}
} while (i-- != 0);
}
else
_ma_set_fatal_error(info, save_errno);
info->update= (HA_STATE_CHANGED | HA_STATE_AKTIV | HA_STATE_ROW_CHANGED |
key_changed);
err_end:
_ma_writeinfo(info, WRITEINFO_UPDATE_KEYFILE);
if (save_errno == HA_ERR_KEY_NOT_FOUND)
_ma_set_fatal_error(info, HA_ERR_CRASHED);
DBUG_RETURN(my_errno=save_errno);
} /* maria_update */
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