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--source include/not_embedded.inc
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select @@global.relay_log_info_file;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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select @@session.relay_log_info_file;
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show global variables like 'relay_log_info_file';
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show session variables like 'relay_log_info_file';
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select * from information_schema.global_variables where variable_name='relay_log_info_file';
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select * from information_schema.session_variables where variable_name='relay_log_info_file';
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# show that it's read-only
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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set global relay_log_info_file=1;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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set session relay_log_info_file=1;