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
|
/* Copyright (c) 2016, MariaDB corporation. All rights
reserved.
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 St, Fifth Floor, Boston, MA 02110-1301 USA */
#define MYSQL_SERVER 1
#include <my_global.h>
#include <mysql_version.h>
#include <mysqld.h>
#include <mysql/plugin.h>
#include "sql_plugin.h" // st_plugin_int
#include "sql_class.h"
#include "item.h"
#include "table.h"
#include "vers_string.h"
/* System Versioning: TRT_TRX_ID(), TRT_COMMIT_ID(), TRT_BEGIN_TS(), TRT_COMMIT_TS(), TRT_ISO_LEVEL() */
template <TR_table::field_id_t TRT_FIELD>
class Create_func_trt : public Create_native_func
{
public:
virtual Item *create_native(THD *thd, LEX_CSTRING *name, List<Item> *item_list);
static Create_func_trt<TRT_FIELD> s_singleton;
protected:
Create_func_trt<TRT_FIELD>() {}
virtual ~Create_func_trt<TRT_FIELD>() {}
};
template<TR_table::field_id_t TRT_FIELD>
Create_func_trt<TRT_FIELD> Create_func_trt<TRT_FIELD>::s_singleton;
template <TR_table::field_id_t TRT_FIELD>
Item*
Create_func_trt<TRT_FIELD>::create_native(THD *thd, LEX_CSTRING *name,
List<Item> *item_list)
{
Item *func= NULL;
int arg_count= 0;
if (item_list != NULL)
arg_count= item_list->elements;
switch (arg_count) {
case 1:
{
Item *param_1= item_list->pop();
switch (TRT_FIELD)
{
case TR_table::FLD_BEGIN_TS:
case TR_table::FLD_COMMIT_TS:
func= new (thd->mem_root) Item_func_trt_ts(thd, param_1, TRT_FIELD);
break;
case TR_table::FLD_TRX_ID:
case TR_table::FLD_COMMIT_ID:
case TR_table::FLD_ISO_LEVEL:
func= new (thd->mem_root) Item_func_trt_id(thd, param_1, TRT_FIELD);
break;
default:
DBUG_ASSERT(0);
}
break;
}
case 2:
{
Item *param_1= item_list->pop();
Item *param_2= item_list->pop();
switch (TRT_FIELD)
{
case TR_table::FLD_TRX_ID:
case TR_table::FLD_COMMIT_ID:
func= new (thd->mem_root) Item_func_trt_id(thd, param_1, param_2, TRT_FIELD);
break;
default:
goto error;
}
break;
}
error:
default:
{
my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name->str);
break;
}
}
return func;
};
template <class Item_func_trt_trx_seesX>
class Create_func_trt_trx_sees : public Create_native_func
{
public:
virtual Item *create_native(THD *thd, LEX_CSTRING *name, List<Item> *item_list)
{
Item *func= NULL;
int arg_count= 0;
if (item_list != NULL)
arg_count= item_list->elements;
switch (arg_count) {
case 2:
{
Item *param_1= item_list->pop();
Item *param_2= item_list->pop();
func= new (thd->mem_root) Item_func_trt_trx_seesX(thd, param_1, param_2);
break;
}
default:
my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name->str);
break;
}
return func;
}
static Create_func_trt_trx_sees<Item_func_trt_trx_seesX> s_singleton;
protected:
Create_func_trt_trx_sees<Item_func_trt_trx_seesX>() {}
virtual ~Create_func_trt_trx_sees<Item_func_trt_trx_seesX>() {}
};
template<class X>
Create_func_trt_trx_sees<X> Create_func_trt_trx_sees<X>::s_singleton;
#define BUILDER(F) & F::s_singleton
static Native_func_registry func_array[] =
{
{ { C_STRING_WITH_LEN("TRT_BEGIN_TS") }, BUILDER(Create_func_trt<TR_table::FLD_BEGIN_TS>)},
{ { C_STRING_WITH_LEN("TRT_COMMIT_ID") }, BUILDER(Create_func_trt<TR_table::FLD_COMMIT_ID>)},
{ { C_STRING_WITH_LEN("TRT_COMMIT_TS") }, BUILDER(Create_func_trt<TR_table::FLD_COMMIT_TS>)},
{ { C_STRING_WITH_LEN("TRT_ISO_LEVEL") }, BUILDER(Create_func_trt<TR_table::FLD_ISO_LEVEL>)},
{ { C_STRING_WITH_LEN("TRT_TRX_ID") }, BUILDER(Create_func_trt<TR_table::FLD_TRX_ID>)},
{ { C_STRING_WITH_LEN("TRT_TRX_SEES") }, BUILDER(Create_func_trt_trx_sees<Item_func_trt_trx_sees>)},
{ { C_STRING_WITH_LEN("TRT_TRX_SEES_EQ") }, BUILDER(Create_func_trt_trx_sees<Item_func_trt_trx_sees_eq>)},
{ {0, 0}, NULL}
};
/*
Disable __attribute__() on non-gcc compilers.
*/
#if !defined(__attribute__) && !defined(__GNUC__)
#define __attribute__(A)
#endif
static int versioning_plugin_init(void *p __attribute__ ((unused)))
{
DBUG_ENTER("versioning_plugin_init");
// No need in locking since we so far single-threaded
int res= item_create_append(func_array);
if (res)
{
my_message(ER_PLUGIN_IS_NOT_LOADED, "Can't append function array" , MYF(0));
DBUG_RETURN(res);
}
DBUG_RETURN(0);
}
static int versioning_plugin_deinit(void *p __attribute__ ((unused)))
{
DBUG_ENTER("versioning_plugin_deinit");
(void) item_create_remove(func_array);
DBUG_RETURN(0);
}
struct st_mysql_daemon versioning_plugin=
{ MYSQL_REPLICATION_INTERFACE_VERSION };
/*
Plugin library descriptor
*/
maria_declare_plugin(versioning)
{
MYSQL_REPLICATION_PLUGIN, // initialized after MYSQL_STORAGE_ENGINE_PLUGIN
&versioning_plugin,
"test_versioning",
"MariaDB Corp",
"System Vesioning testing features",
PLUGIN_LICENSE_GPL,
versioning_plugin_init, /* Plugin Init */
versioning_plugin_deinit, /* Plugin Deinit */
0x0100 /* 1.0 */,
NULL, /* status variables */
NULL, /* system variables */
"1.0", /* string version */
MariaDB_PLUGIN_MATURITY_EXPERIMENTAL
}
maria_declare_plugin_end;
|
