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/* 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, const LEX_CSTRING *name,
List<Item> *item_list);
static Create_func_trt<TRT_FIELD> s_singleton;
protected:
Create_func_trt<TRT_FIELD>() = default;
virtual ~Create_func_trt<TRT_FIELD>() = default;
};
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, const 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, const 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>() = default;
virtual ~Create_func_trt_trx_sees<Item_func_trt_trx_seesX>() = default;
};
template<class X>
Create_func_trt_trx_sees<X> Create_func_trt_trx_sees<X>::s_singleton;
#define BUILDER(F) & F::s_singleton
static const Native_func_registry func_array_vers[] =
{
{ { 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= native_functions_hash.append(func_array_vers,
array_elements(func_array_vers));
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) native_functions_hash.remove(func_array_vers,
array_elements(func_array_vers));
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;
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