HP 3000 Manuals HP 3000 Manuals
Database Environment Name and Location An HP ALLBASE/4GL application can access a database environment anywhere in the MPE/iX file system. HP ALLBASE/SQL uses a DBECon file to identify the name and location of a database environment. The application definition screen in the HP ALLBASE/4GL administrator application contains a field that allows you to specify the name of the DBECon file for the database environment for an application. HP ALLBASE/4GL uses an MPE/iX variable HP4SQLPATH to determine the location of the DBECon file. Unless you specify a fully qualified name for the DBEcon file (that is, a name in the form FILE.GROUP.ACCOUNT), HP ALLBASE/4GL appends the current value of the HP4SQLPATH variable to the name you enter in the the DBECon file field to determine the name of the file. If HP4SQLPATH is not defined, HP ALLBASE/4GL searches for the DBECon file in the user's current logon group and account. Application Unloading and Loading When an application is unloaded from the HP ALLBASE/4GL developer environment, the name of the database environment used in the developer environment is included in the application definition record. This name is written into the destination system during the application loading procedure. During the application loading procedure, the loading utility attempts to connect to the database environment specified in the application definition record. If this database does not exist, HP ALLBASE/4GL displays a message asking you to enter the name of a database environment for the application. If you enter the name of a database environment that is not the same as the database environment shown on the application definition screen, HP ALLBASE/4GL amends the application definition screen automatically at the conclusion of the loading procedure.