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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-4469) Fix the CASTing behavior of UDTs
Date Fri, 11 Dec 2009 13:29:18 GMT
Fix the CASTing behavior of UDTs
--------------------------------

                 Key: DERBY-4469
                 URL: https://issues.apache.org/jira/browse/DERBY-4469
             Project: Derby
          Issue Type: Bug
          Components: SQL
    Affects Versions: 10.6.0.0
            Reporter: Rick Hillegas


The actual behavior of UDTs, now under construction, does not conform to the spec. The spec
says that you can't CAST to or from UDTs. This is probably too harsh. We should allow the
following CAST

  cast ( null as udtType )

I also think that we should allow at least the implicit casting of subtypes to supertypes
since Java gives us the ability to discover the type graph. See Knut's comment on DERBY-651
on Dec 11, 2009.


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