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select @@global.lower_case_file_system=2;
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@@global.lower_case_file_system=2
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select @@session.lower_case_file_system;
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ERROR HY000: Variable 'lower_case_file_system' is a GLOBAL variable
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SELECT @@global.lower_case_file_system in (0,1);
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@@global.lower_case_file_system in (0,1)
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SELECT IF(@@global.lower_case_file_system, "ON", "OFF") = VARIABLE_VALUE
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FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
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WHERE VARIABLE_NAME='lower_case_file_system';
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IF(@@global.lower_case_file_system, "ON", "OFF") = VARIABLE_VALUE
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SELECT IF(@@global.lower_case_file_system, "ON", "OFF") = VARIABLE_VALUE
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FROM INFORMATION_SCHEMA.SESSION_VARIABLES
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WHERE VARIABLE_NAME='lower_case_file_system';
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IF(@@global.lower_case_file_system, "ON", "OFF") = VARIABLE_VALUE
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set global lower_case_file_system=1;
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ERROR HY000: Variable 'lower_case_file_system' is a read only variable
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set session lower_case_file_system=1;
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ERROR HY000: Variable 'lower_case_file_system' is a read only variable