Maintaining Your Data Model › Related Procedures for Maintaining Your Model › Delete a Relation

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Delete a Relation

To delete a relation, type D next to the relation to be deleted and press Enter.

Note: Defined as relations can only be deleted if there are no references by other relations to the file it defines.

Example: File B cannot be deleted, that is the Defined as relation cannot be deleted, until the other relations have been deleted. This includes relations that reference that file. If A refers to B, the file B cannot be deleted until the relation A Refers to B is removed.

FIL

FIL

B

B

REF

REF

Defined as

Known by

FIL

FLD

B

b1

REF

REF

and also,

FIL

 

 

A

REF

Refers to

FIL

B

REF

Deleting the Defined as relation removes all functions and access paths built over this file, including default functions and access paths.