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https://issues.apache.org/jira/browse/DERBY-4092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12744544#action_12744544
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Rick Hillegas commented on DERBY-4092:
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Ported 805443 from trunk to 10.5 branch at subversion revision 805444.
> You should not be able to invoke a table function as a scalar function
> ----------------------------------------------------------------------
>
> Key: DERBY-4092
> URL: https://issues.apache.org/jira/browse/DERBY-4092
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.5.1.1
> Reporter: Rick Hillegas
> Assignee: Rick Hillegas
> Fix For: 10.5.3.1, 10.6.0.0
>
> Attachments: derby-4092-01-aa-noVTIsAsScalarValues.diff
>
>
> If you invoke a table function as a scalar function, Derby instantiates the
> ResultSet returned by the table function and returns that ResultSet. This
> behavior looks wrong. Derby should raise an error if you invoke a table
> function as a scalar function. Here is an example of the problem:
> ij> values ( badVTI( 'foo' ) );
> 1
> ---------------
> bad...@1ef69
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