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System Versioning pre0.12
Merge remote-tracking branch 'origin/archive/2017-10-17' into 10.3
This commit is contained in:
Aleksey Midenkov
226
plugin/versioning/versioning.cc
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226
plugin/versioning/versioning.cc
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@ -0,0 +1,226 @@
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/* Copyright (c) 2016, MariaDB corporation. All rights
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reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#define MYSQL_SERVER 1
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#include <my_global.h>
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#include <mysql_version.h>
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#include <mysqld.h>
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#include <mysql/plugin.h>
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#include "sql_plugin.h" // st_plugin_int
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#include "sql_class.h"
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#include "item.h"
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#include "vtq.h"
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#include "vers_utils.h"
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plugin_ref innodb_plugin= NULL;
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static handlerton* innodb_hton= NULL;
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/* System Versioning: VTQ_TRX_ID(), VTQ_COMMIT_ID(), VTQ_BEGIN_TS(), VTQ_COMMIT_TS(), VTQ_ISO_LEVEL() */
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template <vtq_field_t VTQ_FIELD>
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class Create_func_vtq : public Create_native_func
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{
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public:
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virtual Item *create_native(THD *thd, LEX_CSTRING *name, List<Item> *item_list);
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static Create_func_vtq<VTQ_FIELD> s_singleton;
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protected:
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Create_func_vtq<VTQ_FIELD>() {}
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virtual ~Create_func_vtq<VTQ_FIELD>() {}
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};
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template<vtq_field_t VTQ_FIELD>
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Create_func_vtq<VTQ_FIELD> Create_func_vtq<VTQ_FIELD>::s_singleton;
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template <vtq_field_t VTQ_FIELD>
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Item*
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Create_func_vtq<VTQ_FIELD>::create_native(THD *thd, LEX_CSTRING *name,
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List<Item> *item_list)
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{
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Item *func= NULL;
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int arg_count= 0;
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if (item_list != NULL)
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arg_count= item_list->elements;
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switch (arg_count) {
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case 1:
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{
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Item *param_1= item_list->pop();
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switch (VTQ_FIELD)
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{
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case VTQ_BEGIN_TS:
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case VTQ_COMMIT_TS:
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func= new (thd->mem_root) Item_func_vtq_ts(thd, innodb_hton, param_1, VTQ_FIELD);
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break;
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case VTQ_TRX_ID:
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case VTQ_COMMIT_ID:
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case VTQ_ISO_LEVEL:
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func= new (thd->mem_root) Item_func_vtq_id(thd, innodb_hton, param_1, VTQ_FIELD);
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break;
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default:
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DBUG_ASSERT(0);
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}
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break;
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}
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case 2:
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{
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Item *param_1= item_list->pop();
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Item *param_2= item_list->pop();
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switch (VTQ_FIELD)
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{
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case VTQ_TRX_ID:
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case VTQ_COMMIT_ID:
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func= new (thd->mem_root) Item_func_vtq_id(thd, innodb_hton, param_1, param_2, VTQ_FIELD);
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break;
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default:
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goto error;
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}
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break;
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}
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error:
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default:
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{
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my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name->str);
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break;
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}
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}
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return func;
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};
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template <class Item_func_vtq_trx_seesX>
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class Create_func_vtq_trx_sees : public Create_native_func
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{
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public:
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virtual Item *create_native(THD *thd, LEX_CSTRING *name, List<Item> *item_list)
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{
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Item *func= NULL;
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int arg_count= 0;
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if (item_list != NULL)
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arg_count= item_list->elements;
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switch (arg_count) {
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case 2:
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{
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Item *param_1= item_list->pop();
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Item *param_2= item_list->pop();
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func= new (thd->mem_root) Item_func_vtq_trx_seesX(thd, innodb_hton, param_1, param_2);
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break;
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}
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default:
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my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name->str);
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break;
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}
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return func;
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}
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static Create_func_vtq_trx_sees<Item_func_vtq_trx_seesX> s_singleton;
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protected:
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Create_func_vtq_trx_sees<Item_func_vtq_trx_seesX>() {}
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virtual ~Create_func_vtq_trx_sees<Item_func_vtq_trx_seesX>() {}
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};
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template<class X>
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Create_func_vtq_trx_sees<X> Create_func_vtq_trx_sees<X>::s_singleton;
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#define BUILDER(F) & F::s_singleton
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static Native_func_registry func_array[] =
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{
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{ { C_STRING_WITH_LEN("VTQ_BEGIN_TS") }, BUILDER(Create_func_vtq<VTQ_BEGIN_TS>)},
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{ { C_STRING_WITH_LEN("VTQ_COMMIT_ID") }, BUILDER(Create_func_vtq<VTQ_COMMIT_ID>)},
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{ { C_STRING_WITH_LEN("VTQ_COMMIT_TS") }, BUILDER(Create_func_vtq<VTQ_COMMIT_TS>)},
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{ { C_STRING_WITH_LEN("VTQ_ISO_LEVEL") }, BUILDER(Create_func_vtq<VTQ_ISO_LEVEL>)},
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{ { C_STRING_WITH_LEN("VTQ_TRX_ID") }, BUILDER(Create_func_vtq<VTQ_TRX_ID>)},
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{ { C_STRING_WITH_LEN("VTQ_TRX_SEES") }, BUILDER(Create_func_vtq_trx_sees<Item_func_vtq_trx_sees>)},
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{ { C_STRING_WITH_LEN("VTQ_TRX_SEES_EQ") }, BUILDER(Create_func_vtq_trx_sees<Item_func_vtq_trx_sees_eq>)},
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{ {0, 0}, NULL}
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};
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/*
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Disable __attribute__() on non-gcc compilers.
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*/
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#if !defined(__attribute__) && !defined(__GNUC__)
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#define __attribute__(A)
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#endif
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static int versioning_plugin_init(void *p __attribute__ ((unused)))
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{
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static LString InnoDB= "InnoDB";
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DBUG_ENTER("versioning_plugin_init");
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// No need in locking since we so far single-threaded
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int res= item_create_append(func_array);
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if (res)
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{
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my_message(ER_PLUGIN_IS_NOT_LOADED, "Can't append function array" , MYF(0));
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DBUG_RETURN(res);
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}
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innodb_plugin= ha_resolve_by_name(NULL, &InnoDB.lex_cstring(), false);
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if (!innodb_plugin)
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{
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my_error(ER_PLUGIN_IS_NOT_LOADED, MYF(0), InnoDB.ptr());
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DBUG_RETURN(1);
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}
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innodb_hton= plugin_hton(innodb_plugin);
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if (!innodb_hton || (innodb_hton->flags & HTON_NOT_USER_SELECTABLE))
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{
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my_message(ER_PLUGIN_IS_NOT_LOADED, "Can't get handlerton" , MYF(0));
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DBUG_RETURN(1);
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}
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DBUG_RETURN(0);
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}
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static int versioning_plugin_deinit(void *p __attribute__ ((unused)))
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{
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DBUG_ENTER("versioning_plugin_deinit");
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if (innodb_plugin)
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plugin_unlock(NULL, innodb_plugin);
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DBUG_RETURN(0);
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}
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struct st_mysql_daemon versioning_plugin=
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{ MYSQL_REPLICATION_INTERFACE_VERSION };
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/*
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Plugin library descriptor
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*/
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maria_declare_plugin(versioning)
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{
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MYSQL_REPLICATION_PLUGIN, // initialized after MYSQL_STORAGE_ENGINE_PLUGIN
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&versioning_plugin,
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"versioning",
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"MariaDB Corp",
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"System Vesioning testing features",
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PLUGIN_LICENSE_GPL,
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versioning_plugin_init, /* Plugin Init */
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versioning_plugin_deinit, /* Plugin Deinit */
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0x0100 /* 1.0 */,
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NULL, /* status variables */
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NULL, /* system variables */
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"1.0", /* string version */
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MariaDB_PLUGIN_MATURITY_EXPERIMENTAL /* maturity */
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}
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maria_declare_plugin_end;
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