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From "Dag H. Wanvik (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DERBY-5954) NPE in SELECT involving subselects and windows functions
Date Fri, 19 Oct 2012 14:10:12 GMT

     [ https://issues.apache.org/jira/browse/DERBY-5954?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Dag H. Wanvik updated DERBY-5954:
---------------------------------

    Attachment: derby-5954.diff
    
> NPE in SELECT involving subselects and windows functions
> --------------------------------------------------------
>
>                 Key: DERBY-5954
>                 URL: https://issues.apache.org/jira/browse/DERBY-5954
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.10.0.0
>            Reporter: Rick Hillegas
>         Attachments: derby-5954.diff
>
>
> A user reports and I have verified an NPE on the following SELECT:
> connect 'jdbc:derby:memory:db;create=true';
> create table blah ( a int );
> insert into blah values (1), (2), (3), (4), (5), (6), (7);
> SELECT rn, (SELECT rn FROM (SELECT row_number() over() rn FROM blah ) as T2
> where T2.rn = T1.rn+1) rn2
> FROM (SELECT row_number() over() rn from blah) as T1;

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