Modifying Access Paths › Modifying Access Path Relations › Adding Relations to a File

Adding Relations to a File

Each access path initially contains all the relations for the file on which it is based. If a new relation is added to a file, it will be added to the list of access path relations for each of the file's access paths provided that the access paths are not held. Held access paths remain unchanged, as do any functions attached to them.

If a relation is added to an access path and functions already exist that use that access path, the entries that result from resolving the new relations will be added to the function's device designs as follows:

• If they are not key fields on the access path, they will be added as hidden fields to the device design.
• If they are key fields, they will be added as input fields to the device designs.