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https://issues.apache.org/jira/browse/DERBY-4230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kathey Marsden updated DERBY-4230:
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Attachment: DERBY-4230_preview_diff.txt
Here is my initial attempt at a fix for this issue.
DERBY-4230_preview_diff.txt. This is *not* for commit as I still need to add a
regression test and run tests. I just thought I would put it out there to make
sure I am on the right track.
The code that defines the columns for insert in to SYS.SYSCOLUMNS was including
the generated columns. I changed it so that it no longer includes the generated
columns and the test case passes. Are the SYS.SYSCOLUMN entries for views only
used for DatabaseMetaData.getColumns() or is there some other use that might
need the generated columns to be there?
Thanks
Kathey
> 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_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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