Table of Contents


  1. Preface
  2. Introduction to PowerExchange
  3. DBMOVER Configuration File
  4. Netport Jobs
  5. PowerExchange Message Logs and Destination Overrides
  6. SMF Statistics Logging and Reporting
  7. PowerExchange Security
  8. Secure Sockets Layer Support
  9. PowerExchange Alternative Network Security
  10. PowerExchange Nonrelational SQL
  11. DTLDESCRIBE Metadata
  12. PowerExchange Globalization
  13. Using the PowerExchange ODBC Drivers
  14. PowerExchange Datatypes and Conversion Matrix
  15. Appendix A: DTL__CAPXTIMESTAMP Time Stamps
  16. Appendix B: PowerExchange Glossary

VSAM KSDS Considerations

VSAM KSDS Considerations

The VSAM KSDS interface module DTLAMLGF uses point() and read() keyed access if the access supports the values supplied in the WHERE clause for the primary key column. Otherwise the VSAM KSDS interface module uses non-optimized read() calls across the entire file to retrieve records.
For DISAM files on Windows or Linux, while you can define keys that include integer values, PowerExchange cannot perform optimized reading on those keys if they inlcude LE, LT, GE, or GT conditions.


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