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Date: Thu, 21 Jun 2012 17:33:42 +0000 (UTC)
From: "Rick Hillegas (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
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Subject: [jira] [Commented] (DERBY-5779) Table functions and vtis should
 only accept arguments which are constant in their query block.
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    [ https://issues.apache.org/jira/browse/DERBY-5779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13398617#comment-13398617 ] 

Rick Hillegas commented on DERBY-5779:
--------------------------------------

Tests passed cleanly for me on derby-5779-01-ab-forbidReferencesInQueryBlock.diff. Committed at subversion revision 1352631.
                
> Table functions and vtis should only accept arguments which are constant in their query block.
> ----------------------------------------------------------------------------------------------
>
>                 Key: DERBY-5779
>                 URL: https://issues.apache.org/jira/browse/DERBY-5779
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.9.1.0
>            Reporter: Rick Hillegas
>            Assignee: Rick Hillegas
>         Attachments: derby-5779-01-ab-forbidReferencesInQueryBlock.diff
>
>
> Derby lets you invoke a table function/vti in the FROM list of a query, passing in arguments built out of columns in other tables in the FROM list. This syntax is illegal and the resulting queries have no meaning under the SQL Standard. See the discussion on DERBY-5554. We should forbid this syntax. Similar syntax involving correlated subqueries in the FROM list is already forbidden. Fixing this will create a backward incompatibility which requires a release note. In particular, the sample usage for SYSCS_DIAG.SPACE_TABLE, given in the Reference Manual, will no longer work after fixing this bug. Changes to SPACE_TABLE are being discussed on DERBY-5554.

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