Syntax:
CREATE SERVER server_name
    FOREIGN DATA WRAPPER wrapper_name
    OPTIONS (option [, option] ...)

option: {
    HOST character-literal
  | DATABASE character-literal
  | USER character-literal
  | PASSWORD character-literal
  | SOCKET character-literal
  | OWNER character-literal
  | PORT numeric-literal
}

This statement creates the definition of a server for use with the
FEDERATED storage engine. The CREATE SERVER statement creates a new row
in the servers table in the mysql database. This statement requires the
SUPER privilege.

The server_name should be a unique reference to the server. Server
definitions are global within the scope of the server, it is not
possible to qualify the server definition to a specific database.
server_name has a maximum length of 64 characters (names longer than 64
characters are silently truncated), and is case-insensitive. You may
specify the name as a quoted string.

The wrapper_name is an identifier and may be quoted with single
quotation marks.

For each option you must specify either a character literal or numeric
literal. Character literals are UTF-8, support a maximum length of 64
characters and default to a blank (empty) string. String literals are
silently truncated to 64 characters. Numeric literals must be a number
between 0 and 9999, default value is 0.

*Note*:

The OWNER option is currently not applied, and has no effect on the
ownership or operation of the server connection that is created.

The CREATE SERVER statement creates an entry in the mysql.servers table
that can later be used with the CREATE TABLE statement when creating a
FEDERATED table. The options that you specify are used to populate the
columns in the mysql.servers table. The table columns are Server_name,
Host, Db, Username, Password, Port and Socket.

URL: https://dev.mysql.com/doc/refman/5.7/en/create-server.html

