70 lines
2.3 KiB
MySQL
70 lines
2.3 KiB
MySQL
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-- Copyright (C) 2023, MariaDB
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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 PROCEDURE IF EXISTS optimizer_switch_choice;
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DROP PROCEDURE IF EXISTS optimizer_switch_on;
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DROP PROCEDURE IF EXISTS optimizer_switch_off;
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DELIMITER $$
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CREATE DEFINER='mariadb.sys'@'localhost' PROCEDURE optimizer_switch_choice(IN on_off VARCHAR(3))
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COMMENT 'return @@optimizer_switch options as a result set for easier readability'
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SQL SECURITY INVOKER
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NOT DETERMINISTIC
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CONTAINS SQL
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BEGIN
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DECLARE tmp VARCHAR(1024);
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DECLARE opt VARCHAR(1024);
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DECLARE start INT;
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DECLARE end INT;
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DECLARE pos INT;
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set tmp=concat(@@optimizer_switch,",");
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CREATE OR REPLACE TEMPORARY TABLE tmp_opt_switch (a varchar(64), opt CHAR(3)) character set latin1 engine=heap;
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set start=1;
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FIND_OPTIONS:
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LOOP
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set pos= INSTR(SUBSTR(tmp, start), ",");
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if (pos = 0) THEN
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LEAVE FIND_OPTIONS;
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END IF;
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set opt= MID(tmp, start, pos-1);
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set end= INSTR(opt, "=");
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insert into tmp_opt_switch values(LEFT(opt,end-1),SUBSTR(opt,end+1));
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set start=start + pos;
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END LOOP;
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SELECT t.a as "option",t.opt from tmp_opt_switch as t where t.opt = on_off order by a;
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DROP TEMPORARY TABLE tmp_opt_switch;
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END$$
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CREATE DEFINER='mariadb.sys'@'localhost' PROCEDURE optimizer_switch_on()
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COMMENT 'return @@optimizer_switch options that are on'
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SQL SECURITY INVOKER
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NOT DETERMINISTIC
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CONTAINS SQL
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BEGIN
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call optimizer_switch_choice("on");
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END$$
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CREATE DEFINER='mariadb.sys'@'localhost' PROCEDURE optimizer_switch_off()
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COMMENT 'return @@optimizer_switch options that are off'
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SQL SECURITY INVOKER
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NOT DETERMINISTIC
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CONTAINS SQL
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BEGIN
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call optimizer_switch_choice("off");
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END$$
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DELIMITER ;
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