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select @@global.max_digest_length;
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@@global.max_digest_length
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select @@session.max_digest_length;
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ERROR HY000: Variable 'max_digest_length' is a GLOBAL variable
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show global variables like 'max_digest_length';
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show session variables like 'max_digest_length';
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select * from information_schema.global_variables
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where variable_name='max_digest_length';
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VARIABLE_NAME VARIABLE_VALUE
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select * from information_schema.session_variables
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where variable_name='max_digest_length';
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VARIABLE_NAME VARIABLE_VALUE
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set global max_digest_length=1;
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ERROR HY000: Variable 'max_digest_length' is a read only variable
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set session max_digest_length=1;
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ERROR HY000: Variable 'max_digest_length' is a read only variable