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Home » Eclipse Projects » DTP » Type hierarchy of JDBCUniqueConstraint
Type hierarchy of JDBCUniqueConstraint [message #590631] Fri, 28 March 2008 13:26
Enrico Schenk is currently offline Enrico SchenkFriend
Messages: 23
Registered: July 2009
Junior Member
Hi,

I've a question regarding the type hierarchy of the class
JDBCUniqueConstraint. The DTP SQL model distinguishes between unique
constraints and primary keys in that way, that every primary key is a
unique constraint but not vice versa.

The class JDBCUniqueConstraint inherits from PrimaryKeyImpl and is
therefore both a primary key and an unique constraint. From my point of
view this conflicts with the definition of the SQL model.

Thanks,

Rico

Software Engineer
Ingres Germany GmbH - European Technology Center
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