|
A free data adapter for reading VSAM data structures comes with the standard FOCUS report writer. To update VSAM data structures with FOCUS, however, you will also need the VSAM Write Data Adapter, as well as either the FOCUS MODIFY or MAINTAIN option. |
Topics: VSAM Operating Environment Considerations
|
Existing VSAM Master Files can be used as is, or you can write new VSAM Master Files following the instructions provided in Describing VSAM Data Sources to FOCUS. While all FOCUS read, write, and update features are usable with VSAM, some work slightly differently due to the nature of the VSAM data structures and those differences are addressed in this manual.
The VSAM Write Data Adapter only supports VSAM key-sequenced data sets (KSDS) and entry-sequenced data sets (ESDS). FOCUS does not support relative-record data sets (RRDS) VSAM files. To retrieve data from RRDS VSAM files, you must write your own access routines using SUFFIX=PRIVATE. See Appendix B for information on writing custom data-access routines.
| Information Builders |