Edit File: sql_max_join_size_basic.test
# # 2010-01-20 OBN - Added check of I_S values after variable value change # SET @start_global_value = @@global.sql_max_join_size; SELECT @start_global_value; # # exists as global and session # select @@global.sql_max_join_size; select @@session.sql_max_join_size; show global variables like 'sql_max_join_size'; show session variables like 'sql_max_join_size'; select * from information_schema.global_variables where variable_name='sql_max_join_size'; select * from information_schema.session_variables where variable_name='sql_max_join_size'; # # show that it's writable # set global sql_max_join_size=10; set session sql_max_join_size=20; select @@global.sql_max_join_size; select @@session.sql_max_join_size; show global variables like 'sql_max_join_size'; show session variables like 'sql_max_join_size'; select * from information_schema.global_variables where variable_name='sql_max_join_size'; select * from information_schema.session_variables where variable_name='sql_max_join_size'; # # incorrect types # --error ER_WRONG_TYPE_FOR_VAR set global sql_max_join_size=1.1; --error ER_WRONG_TYPE_FOR_VAR set global sql_max_join_size=1e1; --error ER_WRONG_TYPE_FOR_VAR set global sql_max_join_size="foo"; # # affects OPTION_BIG_SELECTS # select @@sql_big_selects; set sql_max_join_size=cast(-1 as unsigned int); select @@sql_big_selects; set sql_max_join_size=100; select @@sql_big_selects; SET @@global.sql_max_join_size = @start_global_value; SELECT @@global.sql_max_join_size;
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