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Date: Fri, 23 Oct 2009 20:25:59 +0000 (UTC)
From: "Bryan Pendleton (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
Subject: [jira] Commented: (DERBY-4419) NullPointerException with INSERT
 INTO ... from UNION and generated columns
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    [ https://issues.apache.org/jira/browse/DERBY-4419?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12769411#action_12769411 ] 

Bryan Pendleton commented on DERBY-4419:
----------------------------------------

Thanks for tracking this down, Knut. The test case is eerily similar to the DERBY-1644 case.

I'm afraid I don't have a good guess about what's going wrong, or why the DERBY-1644 patch caused this problem.

Are you intending to investigate this? I'll try to take a look, although not immediately.

> NullPointerException with INSERT INTO ... from UNION and generated columns
> --------------------------------------------------------------------------
>
>                 Key: DERBY-4419
>                 URL: https://issues.apache.org/jira/browse/DERBY-4419
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.3.1.4, 10.4.1.3, 10.5.1.1, 10.5.3.0, 10.6.0.0
>            Reporter: Knut Anders Hatlen
>         Attachments: npe.sql
>
>
> The following sequence of statements works on 10.2.2.0 and earlier, and raises a NullPointerException with 10.3.1.4 and later:
> ij> create table t1(x int);
> 0 rows inserted/updated/deleted
> ij> insert into t1 values 1,2;
> 2 rows inserted/updated/deleted
> ij> create table t2(x int);
> 0 rows inserted/updated/deleted
> ij> insert into t2 values 2,3;
> 2 rows inserted/updated/deleted
> ij> create table t3(x int, y int generated always as identity);
> 0 rows inserted/updated/deleted
> ij> insert into t3(x) select * from t1 union select * from t2;
> ERROR XJ001: Java exception: ': java.lang.NullPointerException'.

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