99 lines
3.7 KiB
SQL
99 lines
3.7 KiB
SQL
-- Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved.
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--
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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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--
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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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--
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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 St, Fifth Floor, Boston, MA 02110-1301 USA
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DROP FUNCTION IF EXISTS ps_is_consumer_enabled;
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DELIMITER $$
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CREATE DEFINER='mysql.sys'@'localhost' FUNCTION ps_is_consumer_enabled (
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in_consumer varchar(64)
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)
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RETURNS enum('YES', 'NO')
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COMMENT '
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Description
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-----------
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Determines whether a consumer is enabled (taking the consumer hierarchy into consideration)
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within the Performance Schema.
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An exception with errno 3047 is thrown if an unknown consumer name is passed to the function.
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A consumer name of NULL returns NULL.
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Parameters
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-----------
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in_consumer VARCHAR(64):
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The name of the consumer to check.
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Returns
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-----------
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ENUM(\'YES\', \'NO\')
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Example
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-----------
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mysql> SELECT sys.ps_is_consumer_enabled(\'events_stages_history\');
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+-----------------------------------------------------+
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| sys.ps_is_consumer_enabled(\'events_stages_history\') |
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+-----------------------------------------------------+
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| NO |
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+-----------------------------------------------------+
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1 row in set (0.00 sec)
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'
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SQL SECURITY INVOKER
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DETERMINISTIC
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READS SQL DATA
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BEGIN
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DECLARE v_is_enabled ENUM('YES', 'NO') DEFAULT NULL;
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DECLARE v_error_msg VARCHAR(128);
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-- Return NULL for a NULL argument.
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IF (in_consumer IS NULL) THEN
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RETURN NULL;
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END IF;
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SET v_is_enabled = (
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SELECT (CASE
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WHEN c.NAME = 'global_instrumentation' THEN c.ENABLED
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WHEN c.NAME = 'thread_instrumentation' THEN IF(cg.ENABLED = 'YES' AND c.ENABLED = 'YES', 'YES', 'NO')
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WHEN c.NAME LIKE '%\_digest' THEN IF(cg.ENABLED = 'YES' AND c.ENABLED = 'YES', 'YES', 'NO')
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WHEN c.NAME LIKE '%\_current' THEN IF(cg.ENABLED = 'YES' AND ct.ENABLED = 'YES' AND c.ENABLED = 'YES', 'YES', 'NO')
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ELSE IF(cg.ENABLED = 'YES' AND ct.ENABLED = 'YES' AND c.ENABLED = 'YES'
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AND ( SELECT cc.ENABLED FROM performance_schema.setup_consumers cc WHERE NAME = CONCAT(SUBSTRING_INDEX(c.NAME, '_', 2), '_current')
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) = 'YES', 'YES', 'NO')
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END) AS IsEnabled
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FROM performance_schema.setup_consumers c
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INNER JOIN performance_schema.setup_consumers cg
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INNER JOIN performance_schema.setup_consumers ct
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WHERE cg.NAME = 'global_instrumentation'
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AND ct.NAME = 'thread_instrumentation'
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AND c.NAME = in_consumer
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);
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IF (v_is_enabled IS NOT NULL) THEN
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RETURN v_is_enabled;
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ELSE
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-- A value of NULL here means it is an unknown consumer name that was passed as an argument.
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-- Only an input value of NULL is allowed to return a NULL result value, to throw a signal instead.
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SET v_error_msg = CONCAT('Invalid argument error: ', in_consumer, ' in function sys.ps_is_consumer_enabled.');
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SIGNAL SQLSTATE 'HY000'
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SET MESSAGE_TEXT = v_error_msg,
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MYSQL_ERRNO = 3047;
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END IF;
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END$$
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DELIMITER ;
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