Input and output for the Extract function

The Extract function is invoked by the EXTRACT command in the HFPSYSIN DD control statement to extract multiple DEDB areas to QSAM data sets.

The SORT program can be invoked internally to achieve better performance by eliminating the SORTIN and the SORTOUT file I/O operation.

The extract function can process the following image copies of a DEDB as input data sets:

  • Standard image copies that are created by IMS Image Copy utility (DFSUDUMP0) or IMS HP Image Copy
  • Compressed image copies that are created by IMS HP Image Copy

The following figure shows the input and the output for the Extract function.

Figure 1. Input and output for the Extract function
This figure depicts the typical input and the output data sets for the Extract function. Details about the data sets are described in this topic.