summaryrefslogtreecommitdiffstats
path: root/storage/maria/ma_update.c
diff options
context:
space:
mode:
Diffstat (limited to 'storage/maria/ma_update.c')
-rw-r--r--storage/maria/ma_update.c253
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..cb1a1e48
--- /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",
+ maria_print_error(info->s, HA_ERR_CRASHED);
+ 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(share, 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(share, my_errno);
+ break;
+ }
+ }
+ }
+ } while (i-- != 0);
+ }
+ else
+ _ma_set_fatal_error(share, 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(share, HA_ERR_CRASHED);
+ DBUG_RETURN(my_errno=save_errno);
+} /* maria_update */