The USE USER statement can be used to terminate the current database connection and to establish a new one with the specified parameters.
Syntax:
The keyword USER must be followed by the name and password of the new user. These are converted into uppercase characters by the database system, unless they are enclosed in double quotation marks. Database name and servernode name are not automatically converted into uppercase characters. If the SERVERDB option is omitted, an attempt is made to connect to the database on which the user is working. If NOLOG is specified, then a NOLOG database session is opened.
USER &U establishes a database connection with the parameters that were used for the call of LOAD, thus renewing the initial session.