HQL "is null" And "!= null" on an Oracle column

That is a binary operator in hibernate you should use

is not null

oracle hibernate null

No. You have to use is null and is not null in HQL.

oracle hibernate null

If you do want to use null values with '=' or '<>' operators you may find the

answer from @egallardo hier

very useful.

Short example for '=': The expression

WHERE t.field = :param

you refactor like this

WHERE ((:param is null and t.field is null) or t.field = :param)

Now you can set the parameter param either to some non-null value or to null:

query.setParameter("param", "Hello World"); // Worksquery.setParameter("param", null);          // Works also

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