Re-enable VTIs
--------------

         Key: DERBY-716
         URL: http://issues.apache.org/jira/browse/DERBY-716
     Project: Derby
        Type: New Feature
    Reporter: Rick Hillegas


Cloudscape used to expose Virtual Table Interfaces, by which any class which 
implemented ResultSet could be included in a query's FROM list. Derby still 
exposes a number of these VTIs as diagnostic tools. However, Derby now prevents 
customers from declaring their own VTIs. The parser raises an error if a VTI's 
package isn't one of the Derby diagnostic packages.

This is a very powerful feature which customers can use to solve many problems. 
We should discuss the reasons that it was disabled and come up with a plan for 
putting this power back into our customers' hands.

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