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72 lines
2.2 KiB
SQL
72 lines
2.2 KiB
SQL
-- Copyright (c) 2015, 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_thread_instrumented;
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DELIMITER $$
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CREATE DEFINER='mariadb.sys'@'localhost' FUNCTION ps_is_thread_instrumented (
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in_connection_id BIGINT UNSIGNED
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) RETURNS ENUM('YES', 'NO', 'UNKNOWN')
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COMMENT '
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Description
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-----------
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Checks whether the provided connection id is instrumented within Performance Schema.
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Parameters
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-----------
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in_connection_id (BIGINT UNSIGNED):
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The id of the connection to check.
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Returns
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-----------
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ENUM(\'YES\', \'NO\', \'UNKNOWN\')
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Example
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-----------
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mysql> SELECT sys.ps_is_thread_instrumented(CONNECTION_ID());
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+------------------------------------------------+
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| sys.ps_is_thread_instrumented(CONNECTION_ID()) |
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+------------------------------------------------+
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| YES |
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+------------------------------------------------+
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'
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SQL SECURITY INVOKER
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NOT DETERMINISTIC
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READS SQL DATA
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BEGIN
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DECLARE v_enabled ENUM('YES', 'NO', 'UNKNOWN');
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IF (in_connection_id IS NULL) THEN
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RETURN NULL;
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END IF;
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SELECT INSTRUMENTED INTO v_enabled
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FROM performance_schema.threads
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WHERE PROCESSLIST_ID = in_connection_id;
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IF (v_enabled IS NULL) THEN
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RETURN 'UNKNOWN';
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ELSE
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RETURN v_enabled;
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END IF;
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END$$
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DELIMITER ;
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