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author | Monty <monty@mariadb.org> | 2023-01-04 18:52:18 +0100 |
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committer | Monty <monty@mariadb.org> | 2023-02-10 12:58:50 +0200 |
commit | 5de734da6bc003315ae148765d89e1a23d950df1 (patch) | |
tree | 48715bafc74c285304c2a37e3c859c565e3301dc /scripts | |
parent | 356a86015522a45dd0ff627fdc473dc62d07fe8f (diff) | |
download | mariadb-git-5de734da6bc003315ae148765d89e1a23d950df1.tar.gz |
Added sys.optimizer_switch_on() and sys.optimizer_switch_off()
These are helpful tools to quickly see what optimizer switch options
are on or off. The different options are displayed alphabetically
Diffstat (limited to 'scripts')
-rw-r--r-- | scripts/sys_schema/CMakeLists.txt | 1 | ||||
-rw-r--r-- | scripts/sys_schema/procedures/optimizer_switch.sql | 69 |
2 files changed, 70 insertions, 0 deletions
diff --git a/scripts/sys_schema/CMakeLists.txt b/scripts/sys_schema/CMakeLists.txt index ccb268cc4fd..dc023174fc7 100644 --- a/scripts/sys_schema/CMakeLists.txt +++ b/scripts/sys_schema/CMakeLists.txt @@ -130,6 +130,7 @@ ${CMAKE_CURRENT_SOURCE_DIR}/views/p_s/session_ssl_status.sql ${CMAKE_CURRENT_SOURCE_DIR}/procedures/create_synonym_db.sql ${CMAKE_CURRENT_SOURCE_DIR}/procedures/execute_prepared_stmt.sql ${CMAKE_CURRENT_SOURCE_DIR}/procedures/diagnostics.sql +${CMAKE_CURRENT_SOURCE_DIR}/procedures/optimizer_switch.sql ${CMAKE_CURRENT_SOURCE_DIR}/procedures/ps_statement_avg_latency_histogram.sql ${CMAKE_CURRENT_SOURCE_DIR}/procedures/ps_trace_statement_digest.sql ${CMAKE_CURRENT_SOURCE_DIR}/procedures/ps_trace_thread.sql diff --git a/scripts/sys_schema/procedures/optimizer_switch.sql b/scripts/sys_schema/procedures/optimizer_switch.sql new file mode 100644 index 00000000000..febeabc1208 --- /dev/null +++ b/scripts/sys_schema/procedures/optimizer_switch.sql @@ -0,0 +1,69 @@ +-- Copyright (C) 2023, MariaDB +-- +-- 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 PROCEDURE IF EXISTS optimizer_switch_choice; +DROP PROCEDURE IF EXISTS optimizer_switch_on; +DROP PROCEDURE IF EXISTS optimizer_switch_off; +DELIMITER $$ + +CREATE DEFINER='mariadb.sys'@'localhost' PROCEDURE optimizer_switch_choice(IN on_off VARCHAR(3)) +COMMENT 'return @@optimizer_switch options as a result set for easier readability' +SQL SECURITY INVOKER +NOT DETERMINISTIC +CONTAINS SQL +BEGIN + DECLARE tmp VARCHAR(1024); + DECLARE opt VARCHAR(1024); + DECLARE start INT; + DECLARE end INT; + DECLARE pos INT; + set tmp=concat(@@optimizer_switch,","); + CREATE OR REPLACE TEMPORARY TABLE tmp_opt_switch (a varchar(64), opt CHAR(3)) character set latin1 engine=heap; + set start=1; + FIND_OPTIONS: + LOOP + set pos= INSTR(SUBSTR(tmp, start), ","); + if (pos = 0) THEN + LEAVE FIND_OPTIONS; + END IF; + set opt= MID(tmp, start, pos-1); + set end= INSTR(opt, "="); + insert into tmp_opt_switch values(LEFT(opt,end-1),SUBSTR(opt,end+1)); + set start=start + pos; + END LOOP; + SELECT t.a as "option",t.opt from tmp_opt_switch as t where t.opt = on_off order by a; + DROP TEMPORARY TABLE tmp_opt_switch; +END$$ + +CREATE DEFINER='mariadb.sys'@'localhost' PROCEDURE optimizer_switch_on() +COMMENT 'return @@optimizer_switch options that are on' +SQL SECURITY INVOKER +NOT DETERMINISTIC +CONTAINS SQL +BEGIN + call optimizer_switch_choice("on"); +END$$ + +CREATE DEFINER='mariadb.sys'@'localhost' PROCEDURE optimizer_switch_off() +COMMENT 'return @@optimizer_switch options that are off' +SQL SECURITY INVOKER +NOT DETERMINISTIC +CONTAINS SQL +BEGIN + call optimizer_switch_choice("off"); +END$$ + +DELIMITER ; + |