-- Copyright (c) 2014, 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 FUNCTION IF EXISTS ps_is_instrument_default_enabled;

DELIMITER $$

CREATE DEFINER='mariadb.sys'@'localhost' FUNCTION ps_is_instrument_default_enabled (
        in_instrument VARCHAR(128)
    ) 
    RETURNS ENUM('YES', 'NO')
    COMMENT '
             Description
             -----------

             Returns whether an instrument is enabled by default in this version of MySQL.

             Parameters
             -----------

             in_instrument VARCHAR(128): 
               The instrument to check.

             Returns
             -----------

             ENUM(\'YES\', \'NO\')

             Example
             -----------

             mysql> SELECT sys.ps_is_instrument_default_enabled(\'statement/sql/select\');
             +--------------------------------------------------------------+
             | sys.ps_is_instrument_default_enabled(\'statement/sql/select\') |
             +--------------------------------------------------------------+
             | YES                                                          |
             +--------------------------------------------------------------+
             1 row in set (0.00 sec)
            '
    SQL SECURITY INVOKER
    DETERMINISTIC 
    READS SQL DATA 
BEGIN
    DECLARE v_enabled ENUM('YES', 'NO');

    -- Currently the same in all versions
    SET v_enabled = IF(in_instrument LIKE 'wait/io/file/%'
                        OR in_instrument LIKE 'wait/io/table/%'
                        OR in_instrument LIKE 'statement/%'
                        OR in_instrument LIKE 'memory/performance_schema/%'
                        OR in_instrument IN ('wait/lock/table/sql/handler', 'idle')
               /*!50707
                        OR in_instrument LIKE 'stage/innodb/%'
                        OR in_instrument = 'stage/sql/copy to tmp table'
               */
                      ,
                       'YES',
                       'NO'
                    );

    RETURN v_enabled;
END$$

DELIMITER ;
