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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-716) Re-enable VTIs
Date Mon, 22 Oct 2007 21:19:51 GMT

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

Rick Hillegas updated DERBY-716:
--------------------------------

    Attachment: derby-716-11-subqueries-aa.diff

Attaching derby-716-11-subqueries-aa.diff. This adds a test case to TableFunctionTest, verifying
that user-written table functions behave correctly when invoked in subqueries with correlated
references to outer query blocks.

> 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, derby-716-02-DatabaseMetaData-aa.diff,
derby-716-03-DatabaseMetaData-aa.diff, derby-716-04-Optimizer-aa.diff, derby-716-05-PublicAPI-aa.diff,
derby-716-06-TestEncoding-aa.diff, derby-716-07-dblook-aa.diff, derby-716-08-upgrade-aa.diff,
derby-716-09-upgradeLocalization-aa.diff, derby-716-10-datatypesCollation-aa.diff, derby-716-11-subqueries-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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