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From "bernard (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-5629) Queries with guarded null Parameter fail
Date Fri, 23 Mar 2012 20:19:28 GMT

    [ https://issues.apache.org/jira/browse/DERBY-5629?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13237013#comment-13237013

bernard commented on DERBY-5629:

I would not have raised this issue if ANSI/ISO Standard syntax compliance was my concern.

My concern is that Derby is an exception when compared with all major databases in use today
such as Oracle, Microsoft, Sybase, MySQL. I have tried them with this testcase.

This issue is in line with the direction that Derby seems to follow, see "Add support for
setObject(<arg>, null)" https://issues.apache.org/jira/browse/DERBY-1938.

People DO code like this as can be seen at http://en.wikipedia.org/wiki/Java_Persistence_Query_Language#Examples
and they are irritated by Derby's failure.

One could argue that this is an enhancement not a bug except the inconsitencey with DERBY-1938
but would that make a diference?

I think a Derby initiative would be most productive even while there might be a Hibernate
> Queries with guarded null Parameter fail
> ----------------------------------------
>                 Key: DERBY-5629
>                 URL: https://issues.apache.org/jira/browse/DERBY-5629
>             Project: Derby
>          Issue Type: Bug
>          Components: JDBC
>    Affects Versions:
>         Environment: java version "1.6.0_30"
> Java(TM) SE Runtime Environment (build 1.6.0_30-b12)
> Java HotSpot(TM) Client VM (build 20.5-b03, mixed mode, sharing)
>            Reporter: Bernard
>              Labels: derby_triage10_9
>         Attachments: NullParameterHibernateDerbyMaven.zip, NullParameterHibernateHsqlMaven.zip
> Some test cases in the attached Maven project fail where a null parameter is passed in
or a null value is coded in the query.
> In the context of this issue, a recently closed issue appears to be relevant:
> "Add support for setObject(<arg>, null)"
> https://issues.apache.org/jira/browse/DERBY-1938
> Some test cases in the attached project are Hibernate JPQL cases where Hibernate takes
care of generating the SQL queries.
> I thought it was appropriate to make a few cases not only one so that the issue gets
a little more test coverage.
> I also assume that issue DERBY-1938 aims to fix what we can see in these cases.
> This has become a major issue because it causes failure of a minimalistic JPQL query
as shown at
> http://en.wikipedia.org/wiki/Java_Persistence_Query_Language#Examples
> that shows a JPQL query:
> SELECT a FROM Author a WHERE :lastName IS NULL OR LOWER(a.lastName) = :lastName

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