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)"
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
that shows a JPQL query:
SELECT a FROM Author a WHERE :lastName IS NULL OR LOWER(a.lastName) = :lastName