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/* 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;
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