[jira] [Commented] (DERBY-5728) Add Support for NULL IS NULL

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

    [ https://issues.apache.org/jira/browse/DERBY-5728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13262122#comment-13262122 ] 

Knut Anders Hatlen commented on DERBY-5728:
-------------------------------------------

Hi Bernard,

Is this problem different from the one you reported in DERBY-5629?
                
> Add Support for NULL IS NULL
> ----------------------------
>
>                 Key: DERBY-5728
>                 URL: https://issues.apache.org/jira/browse/DERBY-5728
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 10.8.2.2
>         Environment: Windows XP
> java version "1.6.0_31"
> Java(TM) SE Runtime Environment (build 1.6.0_31-b05)
> Java HotSpot(TM) Client VM (build 20.6-b01, mixed mode, sharing)
>            Reporter: bernard
>            Priority: Critical
>         Attachments: NullParameterEclipseLinkDerbyMaven.zip, NullParameterHibernateDerbyMaven.zip
>
>
> The following query fails:
> SELECT ID FROM CUSTOMER WHERE ((NULL IS NULL) OR (NAME = NULL))
> Why this is an issue?
> At least two major Java ORMs, Hibernate JPA and EclipseLink JPA have isues with generating SQL for trivial JPQL queries such as:
> select object(c) from Customer c where ((name: is null) or (c.name = name:))
> where name: is a parameter
> For why this is a fundamental issue, please see a minimalistic JPQL query at
> http://en.wikipedia.org/wiki/Java_Persistence_Query_Language#Examples 
> Part of this has already been resolved by issue "Add support for setObject(<arg>, null)"
> https://issues.apache.org/jira/browse/DERBY-1938
> Please see EclipseLink and Hibernate test cases for verification.

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