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SET @start_read_only = @@global.read_only; SET @start_super_read_only = @@global.super_read_only; SELECT @start_read_only, @start_super_read_only; @start_read_only @start_super_read_only 0 0 '#--------------------FN_DYNVARS_139_01------------------------#' SET @@global.super_read_only = 1; SET @@global.super_read_only = DEFAULT; SELECT @@global.super_read_only; @@global.super_read_only 0 '#---------------------FN_DYNVARS_139_02-------------------------#' SET @@global.super_read_only = @start_super_read_only; SELECT @@global.super_read_only = 0; @@global.super_read_only = 0 1 '#--------------------FN_DYNVARS_139_03------------------------#' SET @@global.super_read_only = 0; SELECT @@global.super_read_only; @@global.super_read_only 0 SET @@global.super_read_only = 1; SELECT @@global.super_read_only; @@global.super_read_only 1 SET @@global.super_read_only = TRUE; SELECT @@global.super_read_only; @@global.super_read_only 1 SET @@global.super_read_only = FALSE; SELECT @@global.super_read_only; @@global.super_read_only 0 SET @@global.super_read_only = ON; SELECT @@global.super_read_only; @@global.super_read_only 1 SET @@global.super_read_only = OFF; SELECT @@global.super_read_only; @@global.super_read_only 0 '#--------------------FN_DYNVARS_139_04-------------------------#' SET @@global.super_read_only = -1; ERROR 42000: Variable 'super_read_only' can't be set to the value of '-1' SELECT @@global.super_read_only; @@global.super_read_only 0 SET @@global.super_read_only = 4294967296; ERROR 42000: Variable 'super_read_only' can't be set to the value of '4294967296' SELECT @@global.super_read_only; @@global.super_read_only 0 SET @@global.super_read_only = 10240022115; ERROR 42000: Variable 'super_read_only' can't be set to the value of '10240022115' SELECT @@global.super_read_only; @@global.super_read_only 0 SET @@global.super_read_only = 10000.01; ERROR 42000: Incorrect argument type to variable 'super_read_only' SELECT @@global.super_read_only; @@global.super_read_only 0 SET @@global.super_read_only = -1024; ERROR 42000: Variable 'super_read_only' can't be set to the value of '-1024' SELECT @@global.super_read_only; @@global.super_read_only 0 SET @@global.super_read_only = 42949672950; ERROR 42000: Variable 'super_read_only' can't be set to the value of '42949672950' SELECT @@global.super_read_only; @@global.super_read_only 0 SET @@global.super_read_only = 'test'; ERROR 42000: Variable 'super_read_only' can't be set to the value of 'test' SELECT @@global.super_read_only; @@global.super_read_only 0 '#-------------------FN_DYNVARS_139_05----------------------------#' SET @@session.super_read_only = 0; ERROR HY000: Variable 'super_read_only' is a GLOBAL variable and should be set with SET GLOBAL SELECT @@super_read_only; @@super_read_only 0 '#----------------------FN_DYNVARS_139_06------------------------#' SELECT IF(@@global.super_read_only, "ON", "OFF") = VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='super_read_only'; IF(@@global.super_read_only, "ON", "OFF") = VARIABLE_VALUE 1 SELECT IF(@@read_only, "ON", "OFF") = VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_VARIABLES WHERE VARIABLE_NAME='super_read_only'; IF(@@read_only, "ON", "OFF") = VARIABLE_VALUE 0 '#---------------------FN_DYNVARS_139_07----------------------#' SET @@global.super_read_only = 1; SELECT @@super_read_only = @@global.super_read_only; @@super_read_only = @@global.super_read_only 1 '#---------------------FN_DYNVARS_139_08----------------------#' SET super_read_only = 1; ERROR HY000: Variable 'super_read_only' is a GLOBAL variable and should be set with SET GLOBAL SELECT @@super_read_only; @@super_read_only 1 SET local.super_read_only = 1; 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 'local.super_read_only = 1' at line 1 SELECT local.super_read_only; ERROR 42S02: Unknown table 'local' in field list SET global.super_read_only = 1; 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 'global.super_read_only = 1' at line 1 SELECT global.super_read_only; ERROR 42S02: Unknown table 'global' in field list SELECT super_read_only = @@session.super_read_only; ERROR 42S22: Unknown column 'super_read_only' in 'field list' SET @@global.read_only = @start_read_only; SET @@global.super_read_only = @start_super_read_only; SELECT @@global.super_read_only; @@global.super_read_only 0 SELECT @@global.read_only; @@global.read_only 0