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SET @global_start_value = @@global.init_slave; SELECT @global_start_value AS INIT_VALUE; INIT_VALUE '#--------------------FN_DYNVARS_037_01------------------#' SELECT init_slave; ERROR 42S22: Unknown column 'init_slave' in 'field list' SELECT @@init_slave; @@init_slave SET @@global.init_slave='SET autocomit=0'; SELECT @@global.init_slave; @@global.init_slave SET autocomit=0 SET global init_slave='SET autocomit=0'; SELECT global init_slave; ERROR 42S22: Unknown column 'global' in 'field list' SELECT @@global init_slave; ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'init_slave' at line 1 '#--------------------FN_DYNVARS_037_02-------------------------#' SET @@global.init_slave = 'SET join_buffer_size=8200'; SET @@global.init_slave = DEFAULT; SELECT @@global.init_slave; @@global.init_slave '#--------------------FN_DYNVARS_037_03-------------------------#' SET @@session.init_slave = ''; ERROR HY000: Variable 'init_slave' is a GLOBAL variable and should be set with SET GLOBAL SET @@init_slave = ""; ERROR HY000: Variable 'init_slave' is a GLOBAL variable and should be set with SET GLOBAL SELECT @@session.init_slave; ERROR HY000: Variable 'init_slave' is a GLOBAL variable SELECT @@local.init_slave; ERROR HY000: Variable 'init_slave' is a GLOBAL variable '#--------------------FN_DYNVARS_037_04-------------------------#' SET @@global.init_slave=""; SELECT @@global.init_slave; @@global.init_slave SET @@global.init_slave='SELECT 1,"abc"'; SELECT @@global.init_slave; @@global.init_slave SELECT 1,"abc" SET @@global.init_slave='SET @a="b"'; SELECT @@global.init_slave; @@global.init_slave SET @a="b" SET @@global.init_slave="SET autocomit=1;REVOKE ALL ON INFORMATION_SCHEMA.*"; SELECT @@global.init_slave; @@global.init_slave SET autocomit=1;REVOKE ALL ON INFORMATION_SCHEMA.* SET @@global.init_slave='SHOW VARIABLES'; SELECT @@global.init_slave; @@global.init_slave SHOW VARIABLES SET @@global.init_slave = NULL; SELECT @@global.init_slave; @@global.init_slave SET @@global.init_slave='abc 123 +-*/'; SELECT @@global.init_slave; @@global.init_slave abc 123 +-*/ SET @@global.init_slave=this_will_give_syntax_error; SELECT @@global.init_slave; @@global.init_slave this_will_give_syntax_error SET @@global.init_slave = init_slave; SELECT @@global.init_slave; @@global.init_slave init_slave '#--------------------FN_DYNVARS_037_05-------------------------#' SET @@global.init_slave = true; ERROR 42000: Incorrect argument type to variable 'init_slave' SET @@global.init_slave = false; ERROR 42000: Incorrect argument type to variable 'init_slave' SET @@global.init_slave = 1.1; ERROR 42000: Incorrect argument type to variable 'init_slave' SET @@global.init_slave = 0; ERROR 42000: Incorrect argument type to variable 'init_slave' SET @@global.init_slave = 1; ERROR 42000: Incorrect argument type to variable 'init_slave' SET @@global.init_slave = -1; ERROR 42000: Incorrect argument type to variable 'init_slave' SET @@global.init_slave = ON; SELECT @@global.init_slave; @@global.init_slave ON '#--------------------FN_DYNVARS_037_06-------------------------#' SELECT @@global.init_slave = (SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='init_slave') AS res; res 1 SET @@global.init_slave = @global_start_value; SELECT @@global.init_slave; @@global.init_slave