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-- 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_thread_id;
DELIMITER $$
CREATE DEFINER='mariadb.sys'@'localhost' FUNCTION ps_thread_id (
in_connection_id BIGINT UNSIGNED
) RETURNS BIGINT UNSIGNED
COMMENT '
Description
-----------
Return the Performance Schema THREAD_ID for the specified connection ID.
Parameters
-----------
in_connection_id (BIGINT UNSIGNED):
The id of the connection to return the thread id for. If NULL, the current
connection thread id is returned.
Example
-----------
mysql> SELECT sys.ps_thread_id(79);
+----------------------+
| sys.ps_thread_id(79) |
+----------------------+
| 98 |
+----------------------+
1 row in set (0.00 sec)
mysql> SELECT sys.ps_thread_id(CONNECTION_ID());
+-----------------------------------+
| sys.ps_thread_id(CONNECTION_ID()) |
+-----------------------------------+
| 98 |
+-----------------------------------+
1 row in set (0.00 sec)
'
SQL SECURITY INVOKER
NOT DETERMINISTIC
READS SQL DATA
BEGIN
RETURN (SELECT THREAD_ID
FROM `performance_schema`.`threads`
WHERE PROCESSLIST_ID = IFNULL(in_connection_id, CONNECTION_ID())
);
END$$
DELIMITER ;
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