The OpenESQL Assistant must first connect to a data source before it can generate SQL. All data sources cataloged on your workstation for the database type you have selected as your OpenESQL Assistant Mode option (ODBC or XDB) are listed in the tree view of the OpenESQL Assistant. By default, the connection is made automatically after you select a database from the tree view. After you have connected, all of the table names in the data source show on the tree view. You can only connect to one data source at a time.