diff options
Diffstat (limited to 'plugin/versioning/versioning.cc')
| -rw-r--r-- | plugin/versioning/versioning.cc | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/plugin/versioning/versioning.cc b/plugin/versioning/versioning.cc new file mode 100644 index 00000000..38ebf762 --- /dev/null +++ b/plugin/versioning/versioning.cc @@ -0,0 +1,210 @@ +/* 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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