[jira] Assigned: (DERBY-4410) NullPointerException when USING clause contains all columns in both join tables

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

     [ https://issues.apache.org/jira/browse/DERBY-4410?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Knut Anders Hatlen reassigned DERBY-4410:
-----------------------------------------

    Assignee: Knut Anders Hatlen

> NullPointerException when USING clause contains all columns in both join tables
> -------------------------------------------------------------------------------
>
>                 Key: DERBY-4410
>                 URL: https://issues.apache.org/jira/browse/DERBY-4410
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.6.0.0
>            Reporter: Knut Anders Hatlen
>            Assignee: Knut Anders Hatlen
>
> ij> create table t(x int);
> 0 rows inserted/updated/deleted
> ij> select t1.*, t2.* from t t1 join t t2 using (x);
> ERROR XJ001: Java exception: ': java.lang.NullPointerException'.
> This statement should have raised an exception because both t1.* and t2.* expand to no columns. See DERBY-4407.

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