> 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: 10.8.2.2
> 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