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SAS/ACCESS Interface to ADABAS Software

Effects of Changing an ADABAS File or NATURAL DDM on Descriptor Files

Changes to an ADABAS file or NATURAL DDM can affect associated SAS/ACCESS descriptor files. If changes to ADABAS data invalidate your descriptor files, you must fix them manually by following these steps:

  1. When you change an ADABAS file or NATURAL DDM, you must re-create the access descriptor(s) with the ACCESS procedure, using the same access descriptor name(s).

  2. Then you must update each view descriptor with PROC ACCESS. Change the view descriptor as needed.

  3. The SAS/ACCESS interface view engine does a rudimentary validation of a view descriptor upon opening it. For example, the engine checks data type and data field grouping information. If a problem is found, the engine writes a message to the log and stops.

Before changing ADABAS data, consider the guidelines listed below.


Changes That Have No Effect on Existing View Descriptors

The following changes to an ADABAS file or NATURAL DDM have no effect on existing view descriptors:


Changes That Might Have an Effect on Existing View Descriptors

The following changes to an ADABAS file or NATURAL DDM might have an effect on existing view descriptors:


Changes That Cause Existing View Descriptors to Fail

The following changes to an ADABAS file or NATURAL DDM cause existing view descriptors to fail when they are used:


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Copyright 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.