1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/* 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 */
/*
Rename a table
*/
#include "ma_fulltext.h"
#include "trnman_public.h"
/**
@brief renames a table
@param old_name current name of table
@param new_name table should be renamed to this name
@return Operation status
@retval 0 OK
@retval !=0 Error
*/
int maria_rename(const char *old_name, const char *new_name)
{
char from[FN_REFLEN],to[FN_REFLEN];
int data_file_rename_error;
#ifdef USE_RAID
uint raid_type=0,raid_chunks=0;
#endif
MARIA_HA *info;
MARIA_SHARE *share;
myf sync_dir;
DBUG_ENTER("maria_rename");
#ifdef EXTRA_DEBUG
_ma_check_table_is_closed(old_name,"rename old_table");
_ma_check_table_is_closed(new_name,"rename new table2");
#endif
/** @todo LOCK take X-lock on table */
if (!(info= maria_open(old_name, O_RDWR, HA_OPEN_FOR_REPAIR, 0)))
DBUG_RETURN(my_errno);
share= info->s;
#ifdef USE_RAID
raid_type = share->base.raid_type;
raid_chunks = share->base.raid_chunks;
#endif
/*
the renaming of an internal table to the final table (like in ALTER TABLE)
is the moment when this table receives its correct create_rename_lsn and
this is important; make sure transactionality has been re-enabled.
*/
DBUG_ASSERT(share->now_transactional == share->base.born_transactional);
sync_dir= (share->now_transactional && !share->temporary &&
!maria_in_recovery) ? MY_SYNC_DIR : 0;
if (sync_dir)
{
LSN lsn;
LEX_CUSTRING log_array[TRANSLOG_INTERNAL_PARTS + 2];
size_t old_name_len= strlen(old_name)+1, new_name_len= strlen(new_name)+1;
log_array[TRANSLOG_INTERNAL_PARTS + 0].str= (uchar*)old_name;
log_array[TRANSLOG_INTERNAL_PARTS + 0].length= old_name_len;
log_array[TRANSLOG_INTERNAL_PARTS + 1].str= (uchar*)new_name;
log_array[TRANSLOG_INTERNAL_PARTS + 1].length= new_name_len;
/*
For this record to be of any use for Recovery, we need the upper
MySQL layer to be crash-safe, which it is not now (that would require
work using the ddl_log of sql/sql_table.cc); when it is, we should
reconsider the moment of writing this log record (before or after op,
under THR_LOCK_maria or not...), how to use it in Recovery.
For now it can serve to apply logs to a backup so we sync it.
*/
if (unlikely(translog_write_record(&lsn, LOGREC_REDO_RENAME_TABLE,
&dummy_transaction_object, NULL,
(translog_size_t)(old_name_len + new_name_len),
sizeof(log_array)/sizeof(log_array[0]),
log_array, NULL, NULL) ||
translog_flush(lsn)))
{
maria_close(info);
DBUG_RETURN(1);
}
/*
store LSN into file, needed for Recovery to not be confused if a
RENAME happened (applying REDOs to the wrong table).
*/
if (_ma_update_state_lsns(share, lsn, share->state.create_trid, TRUE,
TRUE))
{
maria_close(info);
DBUG_RETURN(1);
}
}
_ma_reset_state(info);
maria_close(info);
fn_format(from,old_name,"",MARIA_NAME_IEXT,MY_UNPACK_FILENAME|MY_APPEND_EXT);
fn_format(to,new_name,"",MARIA_NAME_IEXT,MY_UNPACK_FILENAME|MY_APPEND_EXT);
if (mysql_file_rename_with_symlink(key_file_kfile, from, to,
MYF(MY_WME | sync_dir)))
DBUG_RETURN(my_errno);
fn_format(from,old_name,"",MARIA_NAME_DEXT,MY_UNPACK_FILENAME|MY_APPEND_EXT);
fn_format(to,new_name,"",MARIA_NAME_DEXT,MY_UNPACK_FILENAME|MY_APPEND_EXT);
data_file_rename_error=
mysql_file_rename_with_symlink(key_file_dfile, from, to,
MYF(MY_WME | sync_dir));
if (data_file_rename_error)
{
/*
now we have a renamed index file and a non-renamed data file, try to
undo the rename of the index file.
*/
data_file_rename_error= my_errno;
fn_format(from, old_name, "", MARIA_NAME_IEXT, MYF(MY_UNPACK_FILENAME|MY_APPEND_EXT));
fn_format(to, new_name, "", MARIA_NAME_IEXT, MYF(MY_UNPACK_FILENAME|MY_APPEND_EXT));
mysql_file_rename_with_symlink(key_file_kfile, to, from,
MYF(MY_WME | sync_dir));
}
DBUG_RETURN(data_file_rename_error);
}
|
