[jira] Issue Comment Edited: (DERBY-716) Re-enable VTIs

["Daniel John Debrunner (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DERBY-716?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12511554 ] 

Daniel John Debrunner edited comment on DERBY-716 at 7/10/07 1:09 PM:
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Is there a need to add isRowMultiSet() to TypeDescriptor? It looks out of place in that interface.
All the other isXXXX() methods are on TypeId, and in fact the DataTypeDescriptor.isRowMultiSet() just calls the TypeId method.
Also the TypeDescriptorImpl version just returns false which looks wrong, or an indication the method should not be on TypeDescriptor.


 was:
Is there a need to add isRowMultiSet() to TypeDescriptor? It looks out of place in that interface.
All the other isRowMultiSet() methods are on TypeId, and in fact the DataTypeDescriptor.isRowMultiSet() just calls the TypeId method.
Also the TypeDescriptorImpl version just returns false which looks wrong, or an indication the method should not be on TypeDescriptor.

> Re-enable VTIs
> --------------
>
>                 Key: DERBY-716
>                 URL: https://issues.apache.org/jira/browse/DERBY-716
>             Project: Derby
>          Issue Type: New Feature
>          Components: SQL
>            Reporter: Rick Hillegas
>            Assignee: Rick Hillegas
>         Attachments: derby-716-01-basic-aa.diff, functionTables.html, functionTables.html, functionTables.html
>
>
> 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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