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From "Kathey Marsden (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4230) DatabaseMetaData.getColumns() returns extra column from view with group by and expression in SELECT list
Date Thu, 21 May 2009 12:27:45 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12711596#action_12711596
] 

Kathey Marsden commented on DERBY-4230:
---------------------------------------

I spoke to Army and he wasn't sure whether the generated columns always come at the end. I
think I will commit the original proposed fix, (iterating over all the columns and eliminating
the generated ones) to be on the safe side.   I will do this later today if I hear no objections.


> 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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