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From "Mamta A. Satoor (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-4365) NullPointerException when preparing LEFT OUTER JOIN between VALUES statements
Date Thu, 05 Nov 2009 17:39:32 GMT

     [ https://issues.apache.org/jira/browse/DERBY-4365?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Mamta A. Satoor updated DERBY-4365:

    Attachment: DERBY4365_NULLinValues_stat_patch1.txt

I have a patch which I am ready to commit if noone has any objection to it. Basically, for
some reason, for JOIN, we were doing a no-op in the method bindUntypedNullsToResultColumns(ResultColumnList)
rather than checking for untyped nulls for the left and right resultsets. I have made changes
so that check is made. I have added couple more tests (including the one provided by Knut,
where a CAST of NULL values should work fine). I will plan on committing the patch tomorrow
if there is no feedback. The derbyall and junit suites ran fine with the exception of known
intermittent (DERBY-3757) 'ASSERT FAILED transaction table has null entry when running new

> NullPointerException when preparing LEFT OUTER JOIN between VALUES statements
> -----------------------------------------------------------------------------
>                 Key: DERBY-4365
>                 URL: https://issues.apache.org/jira/browse/DERBY-4365
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions:
>            Reporter: Knut Anders Hatlen
>            Assignee: Mamta A. Satoor
>         Attachments: DERBY4365_NULLinValues_diff_patch1.txt, DERBY4365_NULLinValues_stat_patch1.txt
> ij version 10.5
> ij> connect 'jdbc:derby:db;create=true';
> ij> select a.* from (values ('a'),('b'),(null)) a
>     left outer join (values ('c'),('d')) b on 1=1;
> ERROR XJ001: Java exception: ': java.lang.NullPointerException'.

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