diff options
Diffstat (limited to 'storage/maria/ma_update.c')
| -rw-r--r-- | storage/maria/ma_update.c | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/storage/maria/ma_update.c b/storage/maria/ma_update.c new file mode 100644 index 00000000..60ab4452 --- /dev/null +++ b/storage/maria/ma_update.c @@ -0,0 +1,253 @@ +/* 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 */ |