Creating a Primary Key

Declare a primary key in the following circumstances:

• For VIRTUAL data sets that you want DATABridge to update. Declaring the primary key allows DATABridge to update the records in the VIRTUAL data set.
• For data sets where DATABridge requires a unique key set, but the unique key set does not exist in the DMSII DASDL. Declaring the primary key satisfies the DATABridge requirements, without any DASDL modifications.

To create a primary key, GenFormat allows you to specify the data items for a data set that form a primary key.

Caution: DATABridge does not check the validity of the primary key you define. It is your responsibility to choose a primary key that is unique for all records in the data set. Failure to do so could result in duplicate or lost records.