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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-716) Re-enable VTIs
Date Thu, 13 Sep 2007 16:32:32 GMT

    [ https://issues.apache.org/jira/browse/DERBY-716?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12527159

Rick Hillegas commented on DERBY-716:

Attaching derby-716-07-dblook-aa.diff. This patch changes the type name returned by the RowMultiSetImpl
class. The type name has been changed so that dblook will emit re-playable DDL for Table Functions.
The type name has been changed from 'ROW( col1 type1, ... ) MULTISET' to 'TABLE( "COL1" type1,
... )'. Touches the following files:

M      java/engine/org/apache/derby/catalog/types/RowMultiSetImpl.java

Changes the type name.

M      java/testing/org/apache/derbyTesting/functionTests/tests/lang/TableFunctionTest.java

Adjusts this test to account for the new type name.

> 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, 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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