If you do not supply the USER clause, the default user ID is used to attempt the connection. The default user ID is the login name of the user running the application. In this case, you obtain network permissions with the standard authorization procedures. For example, on UNIX, the default user ID must match a user ID in the /etc/hosts.equiv file. On Windows, you must be a member of the domain, or if the database server is installed locally, you must be a valid user on the computer where it is installed.
Related Statements: DISCONNECT, SET CONNECTION, DATABASE, and CREATE DATABASE
For more information about sqlhosts, refer to your IBM Informix Administrator's Guide.