mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 03:52:35 +01:00
141 lines
3.7 KiB
C++
141 lines
3.7 KiB
C++
/* Copyright (C) 2016 MariaDB Foundation and Sergey Vojtovich
|
|
|
|
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 Street, Fifth Floor, Boston, MA 02111-1301 USA */
|
|
|
|
#define MYSQL_SERVER
|
|
#include <my_global.h>
|
|
#include <sql_class.h>
|
|
#include <sql_i_s.h>
|
|
#include <sql_show.h>
|
|
|
|
|
|
static const LEX_CSTRING result_types[]=
|
|
{
|
|
{ STRING_WITH_LEN("VARCHAR") },
|
|
{ STRING_WITH_LEN("DOUBLE") },
|
|
{ STRING_WITH_LEN("INT") },
|
|
{ STRING_WITH_LEN("<IMPOSSIBLE1>") }, // ROW_RESULT
|
|
{ STRING_WITH_LEN("DECIMAL") },
|
|
{ STRING_WITH_LEN("<IMPOSSIBLE2>")} // TIME_RESULT
|
|
};
|
|
|
|
|
|
static const LEX_CSTRING unsigned_result_types[]=
|
|
{
|
|
{ STRING_WITH_LEN("<IMPOSSIBLE3>") }, // UNSIGNED STRING_RESULT
|
|
{ STRING_WITH_LEN("DOUBLE UNSIGNED") },
|
|
{ STRING_WITH_LEN("INT UNSIGNED") },
|
|
{ STRING_WITH_LEN("<IMPOSSIBLE4>") }, // UNSIGNED ROW_RESULT
|
|
{ STRING_WITH_LEN("DECIMAL UNSIGNED") },
|
|
{ STRING_WITH_LEN("<IMPOSSIBLE5>") } // UNSIGNED TIME_RESULT
|
|
};
|
|
|
|
|
|
namespace Show {
|
|
|
|
static ST_FIELD_INFO user_variables_fields_info[] =
|
|
{
|
|
Column("VARIABLE_NAME", Name(), NOT_NULL, "Variable_name"),
|
|
Column("VARIABLE_VALUE", Varchar(2048), NULLABLE, "Value"),
|
|
Column("VARIABLE_TYPE", Name(), NOT_NULL),
|
|
Column("CHARACTER_SET_NAME", CSName(), NULLABLE),
|
|
CEnd()
|
|
};
|
|
|
|
} // namespace Show
|
|
|
|
static int user_variables_fill(THD *thd, TABLE_LIST *tables, COND *cond)
|
|
{
|
|
ulong i;
|
|
TABLE *table= tables->table;
|
|
Field **field= table->field;
|
|
String buff;
|
|
bool is_null;
|
|
|
|
for (i= 0; i < thd->user_vars.records; i++)
|
|
{
|
|
user_var_entry *var= (user_var_entry*) my_hash_element(&thd->user_vars, i);
|
|
|
|
field[0]->store(var->name.str, var->name.length, system_charset_info);
|
|
|
|
if (var->val_str(&is_null, &buff, NOT_FIXED_DEC))
|
|
{
|
|
field[1]->store(buff.ptr(), buff.length(), buff.charset());
|
|
field[1]->set_notnull();
|
|
}
|
|
else if (is_null)
|
|
field[1]->set_null();
|
|
else
|
|
return 1;
|
|
|
|
const LEX_CSTRING *tmp= var->type_handler()->is_unsigned() ?
|
|
&unsigned_result_types[var->type_handler()->result_type()] :
|
|
&result_types[var->type_handler()->result_type()];
|
|
field[2]->store(tmp->str, tmp->length, system_charset_info);
|
|
|
|
if (var->charset())
|
|
{
|
|
field[3]->store(&var->charset()->cs_name, system_charset_info);
|
|
field[3]->set_notnull();
|
|
}
|
|
else
|
|
field[3]->set_null();
|
|
|
|
if (schema_table_store_record(thd, table))
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
int user_variables_reset(void)
|
|
{
|
|
THD *thd= current_thd;
|
|
if (thd)
|
|
my_hash_reset(&thd->user_vars);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int user_variables_init(void *p)
|
|
{
|
|
ST_SCHEMA_TABLE *is= (ST_SCHEMA_TABLE *) p;
|
|
is->fields_info= Show::user_variables_fields_info;
|
|
is->fill_table= user_variables_fill;
|
|
is->reset_table= user_variables_reset;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct st_mysql_information_schema user_variables_descriptor=
|
|
{ MYSQL_INFORMATION_SCHEMA_INTERFACE_VERSION };
|
|
|
|
|
|
maria_declare_plugin(user_variables)
|
|
{
|
|
MYSQL_INFORMATION_SCHEMA_PLUGIN,
|
|
&user_variables_descriptor,
|
|
"user_variables",
|
|
"Sergey Vojtovich",
|
|
"User-defined variables",
|
|
PLUGIN_LICENSE_GPL,
|
|
user_variables_init,
|
|
NULL,
|
|
0x0100,
|
|
NULL,
|
|
NULL,
|
|
"1.0",
|
|
MariaDB_PLUGIN_MATURITY_STABLE
|
|
}
|
|
maria_declare_plugin_end;
|