Syntax:
SHOW RELAYLOG EVENTS
   [IN 'log_name'] [FROM pos] [LIMIT [offset,] row_count]

Shows the events in the relay log of a replication slave. If you do not
specify 'log_name', the first relay log is displayed. This statement
has no effect on the master.

URL: https://mariadb.com/kb/en/show-relaylog-events/

