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From "Christian d'Heureuse (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-716) Re-enable VTIs
Date Tue, 27 Feb 2007 15:20:05 GMT

    [ https://issues.apache.org/jira/browse/DERBY-716?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12476195
] 

Christian d'Heureuse commented on DERBY-716:
--------------------------------------------

Part 2 section 9.15 (Execution of multiset-returning functions) Rule 6 states: "The General
Rules of Subclause 9.14 (Execution of array-returning functions) are applied...".
Therefore Part 13 section 8.5 (Execution of array-returning functions), which modifies Part
1 section 9.14, indirectly also applies to functions returning MULTISETs.

> 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
>
> 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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