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Date: Wed, 17 Oct 2012 13:42:02 +0000 (UTC)
From: "Rick Hillegas (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
Message-ID: <1503509585.57712.1350481323453.JavaMail.jiratomcat@arcas>
Subject: [jira] [Created] (DERBY-5954) NPE in SELECT involving subselects
 and windows functions
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Rick Hillegas created DERBY-5954:
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             Summary: 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


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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