[jira] Created: (CAY-1099) DbMerger logic fails to fix invalid complex FKs

["Scott Anderson (JIRA)" <de...@cayenne.apache.org>]

DbMerger logic fails to fix invalid complex FKs
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                 Key: CAY-1099
                 URL: https://issues.apache.org/cayenne/browse/CAY-1099
             Project: Cayenne
          Issue Type: Bug
          Components: Cayenne Core Library
    Affects Versions: 3.0
         Environment: 3.0 M4, Derby
            Reporter: Scott Anderson
            Assignee: Andrus Adamchik


The merger tries to do the following:
ALTER TABLE mail ADD FOREIGN KEY (sentto) REFERENCES account (id)

Which fails with the error:
Foreign  Key 'SQL080826163049030' is invalid because 'The table cannot be defined as a dependent of table APP.ACCOUNT because of delete rule restrictions. (The relationship causes the table to be delete-connected to the indicated table through multiple relationships and the delete rule of the existing relationship is SET NULL.).  '. 

mail has a 'sentto' and 'sentfrom' field, in the style of REFERENCES account (id) ON DELETE SET NULL

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