mirror of
https://github.com/MariaDB/server.git
synced 2025-11-04 04:46:15 +01:00
141 lines
3.7 KiB
C++
141 lines
3.7 KiB
C++
/* Copyright (C) 2016 MariaDB Foundation and Sergey Vojtovich
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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 Street, Fifth Floor, Boston, MA 02111-1301 USA */
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#define MYSQL_SERVER
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#include <my_global.h>
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#include <sql_class.h>
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#include <sql_i_s.h>
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#include <sql_show.h>
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static const LEX_CSTRING result_types[]=
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{
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{ STRING_WITH_LEN("VARCHAR") },
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{ STRING_WITH_LEN("DOUBLE") },
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{ STRING_WITH_LEN("INT") },
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{ STRING_WITH_LEN("<IMPOSSIBLE1>") }, // ROW_RESULT
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{ STRING_WITH_LEN("DECIMAL") },
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{ STRING_WITH_LEN("<IMPOSSIBLE2>")} // TIME_RESULT
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};
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static const LEX_CSTRING unsigned_result_types[]=
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{
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{ STRING_WITH_LEN("<IMPOSSIBLE3>") }, // UNSIGNED STRING_RESULT
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{ STRING_WITH_LEN("DOUBLE UNSIGNED") },
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{ STRING_WITH_LEN("INT UNSIGNED") },
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{ STRING_WITH_LEN("<IMPOSSIBLE4>") }, // UNSIGNED ROW_RESULT
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{ STRING_WITH_LEN("DECIMAL UNSIGNED") },
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{ STRING_WITH_LEN("<IMPOSSIBLE5>") } // UNSIGNED TIME_RESULT
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};
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namespace Show {
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static ST_FIELD_INFO user_variables_fields_info[] =
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{
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Column("VARIABLE_NAME", Name(), NOT_NULL, "Variable_name"),
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Column("VARIABLE_VALUE", Varchar(2048), NULLABLE, "Value"),
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Column("VARIABLE_TYPE", Name(), NOT_NULL),
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Column("CHARACTER_SET_NAME", CSName(), NULLABLE),
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CEnd()
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};
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} // namespace Show
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static int user_variables_fill(THD *thd, TABLE_LIST *tables, COND *cond)
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{
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ulong i;
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TABLE *table= tables->table;
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Field **field= table->field;
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String buff;
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bool is_null;
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for (i= 0; i < thd->user_vars.records; i++)
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{
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user_var_entry *var= (user_var_entry*) my_hash_element(&thd->user_vars, i);
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field[0]->store(var->name.str, var->name.length, system_charset_info);
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if (var->val_str(&is_null, &buff, NOT_FIXED_DEC))
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{
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field[1]->store(buff.ptr(), buff.length(), buff.charset());
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field[1]->set_notnull();
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}
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else if (is_null)
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field[1]->set_null();
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else
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return 1;
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const LEX_CSTRING *tmp= var->type_handler()->is_unsigned() ?
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&unsigned_result_types[var->type_handler()->result_type()] :
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&result_types[var->type_handler()->result_type()];
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field[2]->store(tmp->str, tmp->length, system_charset_info);
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if (var->charset())
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{
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field[3]->store(&var->charset()->cs_name, system_charset_info);
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field[3]->set_notnull();
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}
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else
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field[3]->set_null();
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if (schema_table_store_record(thd, table))
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return 1;
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}
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return 0;
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}
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int user_variables_reset(void)
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{
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THD *thd= current_thd;
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if (thd)
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my_hash_reset(&thd->user_vars);
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return 0;
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}
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static int user_variables_init(void *p)
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{
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ST_SCHEMA_TABLE *is= (ST_SCHEMA_TABLE *) p;
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is->fields_info= Show::user_variables_fields_info;
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is->fill_table= user_variables_fill;
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is->reset_table= user_variables_reset;
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return 0;
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}
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static struct st_mysql_information_schema user_variables_descriptor=
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{ MYSQL_INFORMATION_SCHEMA_INTERFACE_VERSION };
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maria_declare_plugin(user_variables)
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{
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MYSQL_INFORMATION_SCHEMA_PLUGIN,
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&user_variables_descriptor,
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"user_variables",
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"Sergey Vojtovich",
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"User-defined variables",
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PLUGIN_LICENSE_GPL,
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user_variables_init,
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NULL,
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0x0100,
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NULL,
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NULL,
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"1.0",
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MariaDB_PLUGIN_MATURITY_STABLE
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}
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maria_declare_plugin_end;
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