Fix the CASTing behavior of UDTs
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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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