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select @@global.relay_log_index;
@@global.relay_log_index
mysqld-relay-bin.index
select @@session.relay_log_index;
ERROR HY000: Variable 'relay_log_index' is a GLOBAL variable
show global variables like 'relay_log_index';
Variable_name Value
relay_log_index mysqld-relay-bin.index
show session variables like 'relay_log_index';
Variable_name Value
relay_log_index mysqld-relay-bin.index
select * from information_schema.global_variables where variable_name='relay_log_index';
VARIABLE_NAME VARIABLE_VALUE
RELAY_LOG_INDEX mysqld-relay-bin.index
select * from information_schema.session_variables where variable_name='relay_log_index';
VARIABLE_NAME VARIABLE_VALUE
RELAY_LOG_INDEX mysqld-relay-bin.index
set global relay_log_index=1;
ERROR HY000: Variable 'relay_log_index' is a read only variable
set session relay_log_index=1;
ERROR HY000: Variable 'relay_log_index' is a read only variable
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