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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/* Copyright (C) 2005 MySQL 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; either version 2 of the License, or
(at your option) any later version.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifdef USE_PRAGMA_IMPLEMENTATION
#pragma implementation // gcc: Class implementation
#endif
#include "mysql_priv.h"
#ifdef HAVE_BLACKHOLE_DB
#include "ha_blackhole.h"
/* Blackhole storage engine handlerton */
handlerton blackhole_hton= {
"BLACKHOLE",
SHOW_OPTION_YES,
"/dev/null storage engine (anything you write to it disappears)",
DB_TYPE_BLACKHOLE_DB,
NULL,
0, /* slot */
0, /* savepoint size. */
NULL, /* close_connection */
NULL, /* savepoint */
NULL, /* rollback to savepoint */
NULL, /* release savepoint */
NULL, /* commit */
NULL, /* rollback */
NULL, /* prepare */
NULL, /* recover */
NULL, /* commit_by_xid */
NULL, /* rollback_by_xid */
NULL, /* create_cursor_read_view */
NULL, /* set_cursor_read_view */
NULL, /* close_cursor_read_view */
HTON_CAN_RECREATE
};
/*****************************************************************************
** BLACKHOLE tables
*****************************************************************************/
ha_blackhole::ha_blackhole(TABLE *table_arg)
:handler(&blackhole_hton, table_arg)
{}
static const char *ha_blackhole_exts[] = {
NullS
};
const char **ha_blackhole::bas_ext() const
{
return ha_blackhole_exts;
}
int ha_blackhole::open(const char *name, int mode, uint test_if_locked)
{
DBUG_ENTER("ha_blackhole::open");
thr_lock_init(&thr_lock);
thr_lock_data_init(&thr_lock,&lock,NULL);
DBUG_RETURN(0);
}
int ha_blackhole::close(void)
{
DBUG_ENTER("ha_blackhole::close");
thr_lock_delete(&thr_lock);
DBUG_RETURN(0);
}
int ha_blackhole::create(const char *name, TABLE *table_arg,
HA_CREATE_INFO *create_info)
{
DBUG_ENTER("ha_blackhole::create");
DBUG_RETURN(0);
}
const char *ha_blackhole::index_type(uint key_number)
{
DBUG_ENTER("ha_blackhole::index_type");
DBUG_RETURN((table->key_info[key_number].flags & HA_FULLTEXT) ?
"FULLTEXT" :
(table->key_info[key_number].flags & HA_SPATIAL) ?
"SPATIAL" :
(table->key_info[key_number].algorithm == HA_KEY_ALG_RTREE) ?
"RTREE" :
"BTREE");
}
int ha_blackhole::write_row(byte * buf)
{
DBUG_ENTER("ha_blackhole::write_row");
DBUG_RETURN(0);
}
int ha_blackhole::rnd_init(bool scan)
{
DBUG_ENTER("ha_blackhole::rnd_init");
DBUG_RETURN(0);
}
int ha_blackhole::rnd_next(byte *buf)
{
DBUG_ENTER("ha_blackhole::rnd_next");
DBUG_RETURN(HA_ERR_END_OF_FILE);
}
int ha_blackhole::rnd_pos(byte * buf, byte *pos)
{
DBUG_ENTER("ha_blackhole::rnd_pos");
DBUG_ASSERT(0);
DBUG_RETURN(0);
}
void ha_blackhole::position(const byte *record)
{
DBUG_ENTER("ha_blackhole::position");
DBUG_ASSERT(0);
DBUG_VOID_RETURN;
}
int ha_blackhole::info(uint flag)
{
DBUG_ENTER("ha_blackhole::info");
records= 0;
deleted= 0;
errkey= 0;
mean_rec_length= 0;
data_file_length= 0;
index_file_length= 0;
max_data_file_length= 0;
delete_length= 0;
if (flag & HA_STATUS_AUTO)
auto_increment_value= 1;
DBUG_RETURN(0);
}
int ha_blackhole::external_lock(THD *thd, int lock_type)
{
DBUG_ENTER("ha_blackhole::external_lock");
DBUG_RETURN(0);
}
uint ha_blackhole::lock_count(void) const
{
DBUG_ENTER("ha_blackhole::lock_count");
DBUG_RETURN(0);
}
THR_LOCK_DATA **ha_blackhole::store_lock(THD *thd,
THR_LOCK_DATA **to,
enum thr_lock_type lock_type)
{
DBUG_ENTER("ha_blackhole::store_lock");
DBUG_RETURN(to);
}
int ha_blackhole::index_read(byte * buf, const byte * key,
uint key_len, enum ha_rkey_function find_flag)
{
DBUG_ENTER("ha_blackhole::index_read");
DBUG_RETURN(0);
}
int ha_blackhole::index_read_idx(byte * buf, uint idx, const byte * key,
uint key_len, enum ha_rkey_function find_flag)
{
DBUG_ENTER("ha_blackhole::index_read_idx");
DBUG_RETURN(HA_ERR_END_OF_FILE);
}
int ha_blackhole::index_read_last(byte * buf, const byte * key, uint key_len)
{
DBUG_ENTER("ha_blackhole::index_read_last");
DBUG_RETURN(HA_ERR_END_OF_FILE);
}
int ha_blackhole::index_next(byte * buf)
{
DBUG_ENTER("ha_blackhole::index_next");
DBUG_RETURN(HA_ERR_END_OF_FILE);
}
int ha_blackhole::index_prev(byte * buf)
{
DBUG_ENTER("ha_blackhole::index_prev");
DBUG_RETURN(HA_ERR_END_OF_FILE);
}
int ha_blackhole::index_first(byte * buf)
{
DBUG_ENTER("ha_blackhole::index_first");
DBUG_RETURN(HA_ERR_END_OF_FILE);
}
int ha_blackhole::index_last(byte * buf)
{
DBUG_ENTER("ha_blackhole::index_last");
DBUG_RETURN(HA_ERR_END_OF_FILE);
}
#endif /* HAVE_BLACKHOLE_DB */
|
