Database Selection facility

The Database Selection facility (DBSF), available in the Unload function, allows you to retrieve selected database records from a database and to print them or write them to an HD Unload data set.

You can use the DBSF to create test databases or to print or unload specific database records.

To process a partial subset, use the DBSF. You must know the boundaries of the subsets. For example, if you want to unload the last part of subset 1 and the first part of subset 2, you can use the DBSF to extract that subset using the Unload function.

For HDAM and PHDAM databases, you must know the starting and ending relative block number for each subset. For HIDAM and PHIDAM databases, you must supply the key ranges for each subset.

Note

Partition selection routines are not automatically invoked. For HALDBs with partition selection routines, you must supply the appropriate ranges for each partition.

This section contains the following topics:


Related topic

Unload-function-as-a-standalone-utility


 

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