mariadb/mysql-test/t/optimizer_switch.test

--echo #
--echo # Generic @@optimizer_switch tests 
--echo # 
--echo #

--replace_regex /,table_elimination=on//
select @@optimizer_switch;

set optimizer_switch='index_merge=off,index_merge_union=off';
--replace_regex /,table_elimination=on//
select @@optimizer_switch;

set optimizer_switch='index_merge_union=on';
--replace_regex /,table_elimination=on//
select @@optimizer_switch;

set optimizer_switch='default,index_merge_sort_union=off';
--replace_regex /,table_elimination=on//
select @@optimizer_switch;

--error ER_WRONG_VALUE_FOR_VAR
set optimizer_switch=4;

--error ER_WRONG_VALUE_FOR_VAR
set optimizer_switch=NULL;

--error ER_WRONG_VALUE_FOR_VAR
set optimizer_switch='default,index_merge';

--error ER_WRONG_VALUE_FOR_VAR
set optimizer_switch='index_merge=index_merge';

--error ER_WRONG_VALUE_FOR_VAR
set optimizer_switch='index_merge=on,but...';

--error ER_WRONG_VALUE_FOR_VAR
set optimizer_switch='index_merge=';

--error ER_WRONG_VALUE_FOR_VAR
set optimizer_switch='index_merge';

--error ER_WRONG_VALUE_FOR_VAR
set optimizer_switch='on';

--error ER_WRONG_VALUE_FOR_VAR
set optimizer_switch='index_merge=on,index_merge=off';

--error ER_WRONG_VALUE_FOR_VAR
set optimizer_switch='index_merge_union=on,index_merge_union=default';

--error ER_WRONG_VALUE_FOR_VAR
set optimizer_switch='default,index_merge=on,index_merge=off,default';

set optimizer_switch=default;
set optimizer_switch='index_merge=off,index_merge_union=off,default';
--replace_regex /,table_elimination=on//
select @@optimizer_switch;
set optimizer_switch=default;

# Check setting defaults for global vars
--replace_regex /,table_elimination=on//
select @@global.optimizer_switch;
set @@global.optimizer_switch=default;
--replace_regex /,table_elimination=on//
select @@global.optimizer_switch;

--echo #
--echo # Check index_merge's @@optimizer_switch flags
--echo #
--replace_regex /,table_elimination.on//
select @@optimizer_switch;

--echo
--echo BUG#37120 optimizer_switch allowable values not according to specification
--echo

--replace_regex /,table_elimination=on//
select @@optimizer_switch; 

set optimizer_switch='default,materialization=off';
--replace_regex /,table_elimination=on//
select @@optimizer_switch; 

set optimizer_switch='default,semijoin=off';
--replace_regex /,table_elimination=on//
select @@optimizer_switch; 

set optimizer_switch='default,loosescan=off';
--replace_regex /,table_elimination=on//
select @@optimizer_switch; 

set optimizer_switch='default,semijoin=off,materialization=off';
--replace_regex /,table_elimination=on//
select @@optimizer_switch; 

set optimizer_switch='default,materialization=off,semijoin=off';
--replace_regex /,table_elimination=on//
select @@optimizer_switch; 

set optimizer_switch='default,semijoin=off,materialization=off,loosescan=off';
--replace_regex /,table_elimination=on//
select @@optimizer_switch; 

set optimizer_switch='default,semijoin=off,loosescan=off';
--replace_regex /,table_elimination=on//
select @@optimizer_switch; 

set optimizer_switch='default,materialization=off,loosescan=off';
--replace_regex /,table_elimination=on//
select @@optimizer_switch; 
set optimizer_switch=default;

#
# Bug #695304: invalid default setting for optimizer_switch
#

--replace_regex /,table_elimination=on//
select @@optimizer_switch;