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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 FUNCTION IF EXISTS ps_is_thread_instrumented;
DELIMITER $$
CREATE DEFINER='mariadb.sys'@'localhost' FUNCTION ps_is_thread_instrumented (
in_connection_id BIGINT UNSIGNED
) RETURNS ENUM('YES', 'NO', 'UNKNOWN')
COMMENT '
Description
-----------
Checks whether the provided connection id is instrumented within Performance Schema.
Parameters
-----------
in_connection_id (BIGINT UNSIGNED):
The id of the connection to check.
Returns
-----------
ENUM(\'YES\', \'NO\', \'UNKNOWN\')
Example
-----------
mysql> SELECT sys.ps_is_thread_instrumented(CONNECTION_ID());
+------------------------------------------------+
| sys.ps_is_thread_instrumented(CONNECTION_ID()) |
+------------------------------------------------+
| YES |
+------------------------------------------------+
'
SQL SECURITY INVOKER
NOT DETERMINISTIC
READS SQL DATA
BEGIN
DECLARE v_enabled ENUM('YES', 'NO', 'UNKNOWN');
IF (in_connection_id IS NULL) THEN
RETURN NULL;
END IF;
SELECT INSTRUMENTED INTO v_enabled
FROM performance_schema.threads
WHERE PROCESSLIST_ID = in_connection_id;
IF (v_enabled IS NULL) THEN
RETURN 'UNKNOWN';
ELSE
RETURN v_enabled;
END IF;
END$$
DELIMITER ;
|
