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SET @start_global_value = @@global.innodb_stats_on_metadata; SELECT @start_global_value; @start_global_value 0 Valid values are 'ON' and 'OFF' select @@global.innodb_stats_on_metadata in (0, 1); @@global.innodb_stats_on_metadata in (0, 1) 1 select @@global.innodb_stats_on_metadata; @@global.innodb_stats_on_metadata 0 select @@session.innodb_stats_on_metadata; ERROR HY000: Variable 'innodb_stats_on_metadata' is a GLOBAL variable show global variables like 'innodb_stats_on_metadata'; Variable_name Value innodb_stats_on_metadata OFF show session variables like 'innodb_stats_on_metadata'; Variable_name Value innodb_stats_on_metadata OFF select * from information_schema.global_variables where variable_name='innodb_stats_on_metadata'; VARIABLE_NAME VARIABLE_VALUE INNODB_STATS_ON_METADATA OFF select * from information_schema.session_variables where variable_name='innodb_stats_on_metadata'; VARIABLE_NAME VARIABLE_VALUE INNODB_STATS_ON_METADATA OFF set global innodb_stats_on_metadata='OFF'; select @@global.innodb_stats_on_metadata; @@global.innodb_stats_on_metadata 0 select * from information_schema.global_variables where variable_name='innodb_stats_on_metadata'; VARIABLE_NAME VARIABLE_VALUE INNODB_STATS_ON_METADATA OFF select * from information_schema.session_variables where variable_name='innodb_stats_on_metadata'; VARIABLE_NAME VARIABLE_VALUE INNODB_STATS_ON_METADATA OFF set @@global.innodb_stats_on_metadata=1; select @@global.innodb_stats_on_metadata; @@global.innodb_stats_on_metadata 1 select * from information_schema.global_variables where variable_name='innodb_stats_on_metadata'; VARIABLE_NAME VARIABLE_VALUE INNODB_STATS_ON_METADATA ON select * from information_schema.session_variables where variable_name='innodb_stats_on_metadata'; VARIABLE_NAME VARIABLE_VALUE INNODB_STATS_ON_METADATA ON set global innodb_stats_on_metadata=0; select @@global.innodb_stats_on_metadata; @@global.innodb_stats_on_metadata 0 select * from information_schema.global_variables where variable_name='innodb_stats_on_metadata'; VARIABLE_NAME VARIABLE_VALUE INNODB_STATS_ON_METADATA OFF select * from information_schema.session_variables where variable_name='innodb_stats_on_metadata'; VARIABLE_NAME VARIABLE_VALUE INNODB_STATS_ON_METADATA OFF set @@global.innodb_stats_on_metadata='ON'; select @@global.innodb_stats_on_metadata; @@global.innodb_stats_on_metadata 1 select * from information_schema.global_variables where variable_name='innodb_stats_on_metadata'; VARIABLE_NAME VARIABLE_VALUE INNODB_STATS_ON_METADATA ON select * from information_schema.session_variables where variable_name='innodb_stats_on_metadata'; VARIABLE_NAME VARIABLE_VALUE INNODB_STATS_ON_METADATA ON set session innodb_stats_on_metadata='OFF'; ERROR HY000: Variable 'innodb_stats_on_metadata' is a GLOBAL variable and should be set with SET GLOBAL set @@session.innodb_stats_on_metadata='ON'; ERROR HY000: Variable 'innodb_stats_on_metadata' is a GLOBAL variable and should be set with SET GLOBAL set global innodb_stats_on_metadata=1.1; ERROR 42000: Incorrect argument type to variable 'innodb_stats_on_metadata' set global innodb_stats_on_metadata=1e1; ERROR 42000: Incorrect argument type to variable 'innodb_stats_on_metadata' set global innodb_stats_on_metadata=2; ERROR 42000: Variable 'innodb_stats_on_metadata' can't be set to the value of '2' set global innodb_stats_on_metadata=-3; ERROR 42000: Variable 'innodb_stats_on_metadata' can't be set to the value of '-3' select @@global.innodb_stats_on_metadata; @@global.innodb_stats_on_metadata 1 select * from information_schema.global_variables where variable_name='innodb_stats_on_metadata'; VARIABLE_NAME VARIABLE_VALUE INNODB_STATS_ON_METADATA ON select * from information_schema.session_variables where variable_name='innodb_stats_on_metadata'; VARIABLE_NAME VARIABLE_VALUE INNODB_STATS_ON_METADATA ON set global innodb_stats_on_metadata='AUTO'; ERROR 42000: Variable 'innodb_stats_on_metadata' can't be set to the value of 'AUTO' SET @@global.innodb_stats_on_metadata = @start_global_value; SELECT @@global.innodb_stats_on_metadata; @@global.innodb_stats_on_metadata 0