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22 lines
679 B
Text
22 lines
679 B
Text
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select @@global.back_log;
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@@global.back_log
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50
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select @@session.back_log;
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ERROR HY000: Variable 'back_log' is a GLOBAL variable
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show global variables like 'back_log';
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Variable_name Value
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back_log 50
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show session variables like 'back_log';
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Variable_name Value
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back_log 50
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select * from information_schema.global_variables where variable_name='back_log';
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VARIABLE_NAME VARIABLE_VALUE
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BACK_LOG 50
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select * from information_schema.session_variables where variable_name='back_log';
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VARIABLE_NAME VARIABLE_VALUE
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BACK_LOG 50
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set global back_log=1;
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ERROR HY000: Variable 'back_log' is a read only variable
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set session back_log=1;
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ERROR HY000: Variable 'back_log' is a read only variable
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