Advanced User Topics for the SAS/ACCESS Interface View Engine for IMS

Changes That Cause Existing View Descriptors to Fail

The following changes to an IMS database cause existing view descriptors to fail:

inserting or deleting segments in the middle of the hierarchy if you are updating the database
inserting or deleting a level in multiple occurring fields
changing the attributes of a field
deleting fields that are referenced in a view descriptor
inserting a field in the middle of a segment
adding fields to the end of database segments because longer segments might not be reflected in the RECORD statement's SEGLNG= argument