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https://issues.apache.org/jira/browse/DERBY-4230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12711117#action_12711117
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Kathey Marsden commented on DERBY-4230:
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Thanks Knut for the review. You said:
>I wonder if it would be better in genColumnInfos() to use rcl.visibleSize()
>(or >perhaps colInfos.length) as stop condition for the loop and skip the
>>rc.isGenerated test.
Are the generated columns always guaranteed to come at the end? If so I will
make this change and post a new patch.
> DatabaseMetaData.getColumns() returns extra column from view with group by
> and expression in SELECT list
> ---------------------------------------------------------------------------------------------------------
>
> Key: DERBY-4230
> URL: https://issues.apache.org/jira/browse/DERBY-4230
> Project: Derby
> Issue Type: Bug
> Components: JDBC
> Affects Versions: 10.3.2.1
> Reporter: Kathey Marsden
> Assignee: Kathey Marsden
> Attachments: create.sql, DERBY-4230_diff.txt,
> DERBY-4230_preview_diff.txt, ViewTest.java
>
>
> DatabaseMetaData.getColumns() returns an extra column for a view with a group
> by and an expression in the select list. I will attach the reproduction. Run
> the script create.sql and then the program ViewTest.
> This is a regression in version 10.3, It ran ok on latest on the 10.1 and
> 10.2 branches.
> The ResultSetMetaData appears to return the correct number of columns when
> you select from the view, but it would be nice to add a regression test for
> that too.
> See discussion on derby-dev.
> http://www.nabble.com/extra-column-in-DatabaseMetaData.getColumns()-with-group-by-in-view-td23545576.html
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