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-- Copyright (c) 2015, Oracle and/or its affiliates. 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
DROP PROCEDURE IF EXISTS execute_prepared_stmt;
DELIMITER $$
CREATE DEFINER='mariadb.sys'@'localhost' PROCEDURE execute_prepared_stmt (
IN in_query longtext CHARACTER SET UTF8
)
COMMENT '
Description
-----------
Takes the query in the argument and executes it using a prepared statement. The prepared statement is deallocated,
so the procedure is mainly useful for executing one off dynamically created queries.
The sys_execute_prepared_stmt prepared statement name is used for the query and is required not to exist.
Parameters
-----------
in_query (longtext CHARACTER SET UTF8):
The query to execute.
Configuration Options
----------------------
sys.debug
Whether to provide debugging output.
Default is ''OFF''. Set to ''ON'' to include.
Example
--------
mysql> CALL sys.execute_prepared_stmt(''SELECT * FROM sys.sys_config'');
+------------------------+-------+---------------------+--------+
| variable | value | set_time | set_by |
+------------------------+-------+---------------------+--------+
| statement_truncate_len | 64 | 2015-06-30 13:06:00 | NULL |
+------------------------+-------+---------------------+--------+
1 row in set (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
'
SQL SECURITY INVOKER
NOT DETERMINISTIC
READS SQL DATA
BEGIN
-- Set configuration options
IF (@sys.debug IS NULL) THEN
SET @sys.debug = sys.sys_get_config('debug', 'OFF');
END IF;
-- Verify the query exists
-- The shortest possible query is "DO 1"
IF (in_query IS NULL OR LENGTH(in_query) < 4) THEN
SIGNAL SQLSTATE '45000'
SET MESSAGE_TEXT = "The @sys.execute_prepared_stmt.sql must contain a query";
END IF;
SET @sys.execute_prepared_stmt.sql = in_query;
IF (@sys.debug = 'ON') THEN
SELECT @sys.execute_prepared_stmt.sql AS 'Debug';
END IF;
PREPARE sys_execute_prepared_stmt FROM @sys.execute_prepared_stmt.sql;
EXECUTE sys_execute_prepared_stmt;
DEALLOCATE PREPARE sys_execute_prepared_stmt;
SET @sys.execute_prepared_stmt.sql = NULL;
END$$
DELIMITER ;
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