Optional callback which should return a newly-opened Phobos or Vibe.d TCP socket. This allows custom sockets to be used, subclassed from Phobos's or Vibe.d's sockets.
An IP address in numeric dotted form, or as a host name.
The user name to authenticate.
Desired initial database.
The set of flag bits from the server's capabilities that the client requires
Construct opened connection.
Throws mysql.exceptions.MYX upon failure to connect.
If you are using Vibe.d, consider using mysql.pool.MySQLPool instead of creating a new Connection directly. That will provide certain benefits, such as reusing old connections and automatic cleanup (no need to close the connection when done).