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From "Dag H. Wanvik (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-6565) ROW_NUMBER function throws NullPointerException in UPDATE statement
Date Tue, 05 Aug 2014 03:02:13 GMT

    [ https://issues.apache.org/jira/browse/DERBY-6565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14085714#comment-14085714
] 

Dag H. Wanvik commented on DERBY-6565:
--------------------------------------

The following now works:
{code}
s.execute("create table t(x int)");
s.execute("insert into t values -1,-2");
s.execute("update t set x = x - (row_number() over () * 2)");
BaseJDBCTestCase.dumpRs(s.executeQuery("select * from t"));
{code}
giving
{code}
         X
         -
        {-3}
        {-6}
{code}


> ROW_NUMBER function throws NullPointerException in UPDATE statement
> -------------------------------------------------------------------
>
>                 Key: DERBY-6565
>                 URL: https://issues.apache.org/jira/browse/DERBY-6565
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.10.2.0
>            Reporter: Knut Anders Hatlen
>            Assignee: Dag H. Wanvik
>            Priority: Minor
>         Attachments: derby-6565.diff
>
>
> A NullPointerException is raised with this (possibly illegal?) UPDATE statement:
> {noformat}
> ij version 10.10
> ij> connect 'jdbc:derby:memory:db;create=true';
> ij> create table t(x int);
> 0 rows inserted/updated/deleted
> ij> insert into t values 1;
> 1 row inserted/updated/deleted
> ij> update t set x = row_number() over ();
> ERROR XJ001: Java exception: ': java.lang.NullPointerException'.
> {noformat}



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