[jira] Updated: (DERBY-3997) ORDER BY causes column to be returned

["Knut Anders Hatlen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DERBY-3997?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Knut Anders Hatlen updated DERBY-3997:
--------------------------------------

    Attachment: d3997.stat
                d3997.diff

Here's a patch with a fix and a test case. Both suites.All and derbyall ran cleanly.

Thanks for the suggestion about * in the select list, Bryan. I tested that manually, and I didn't find any problem. ResultColumnList.removeOrderByColumns() should only remove columns that have been added for the order by, and it should leave the original select list intact. I haven't added any test case to ensure that elimination of the order by clause doesn't remove columns that should have been in the result, as that seems to be tested already.

> ORDER BY causes column to be returned
> -------------------------------------
>
>                 Key: DERBY-3997
>                 URL: https://issues.apache.org/jira/browse/DERBY-3997
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.4.1.3
>         Environment: Mac OS 10.4, JDK 1,6
>            Reporter: geoff hendrey
>            Assignee: Knut Anders Hatlen
>         Attachments: d3997.diff, d3997.stat
>
>
> The ORDER BY is causing the ordered column to be retrieved even though it is not part of the SELECT clause. Here is a script to create a table, insert a row, and perform the select:
> CREATE TABLE "REVIEWS"."GEOFF__REVIEWS__REVIEW"
> (
>    PK INTEGER PRIMARY KEY not null,
>    numstars BIGINT,
>    body VARCHAR(32672),
>    title VARCHAR(32672),
>    authoremail VARCHAR(32672)
> );
> INSERT INTO "REVIEWS"."GEOFF__REVIEWS__REVIEW" (PK,numstars,body,title,authoremail) VALUES (0 /*not nullable*/,0,'s','s','s');
> SELECT  "review"."numstars"
> FROM
>     "GEOFF__REVIEWS__REVIEW" AS "review"
> WHERE
>         "review"."PK" = 1
> ORDER BY
>     "review".PK

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