DROP SERVER [ IF EXISTS ] server_name
Drops the server definition for the server named
corresponding row in the
mysql.servers table is
deleted. This statement requires the
Dropping a server for a table does not affect any
FEDERATED tables that used this connection
information when they were created. See
Section 13.1.17, “CREATE SERVER Syntax”.
DROP SERVER does not cause an automatic commit.
In MySQL 5.7,
DROP SERVER is not
written to the binary log, regardless of the logging format that
is in use.
In MySQL 5.7.1,
gtid_next must be
AUTOMATIC before issuing this statement.
This restriction does not apply in MySQL 5.7.2 or later. (Bug
#16062608, Bug #16715809, Bug #69045)