Clemens Rüttermann ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=712020%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiYTE0N2JjMDlm... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-17006?atlOrigin=eyJpIjoiYTE0N2... ) HHH-17006 ( https://hibernate.atlassian.net/browse/HHH-17006?atlOrigin=eyJpIjoiYTE0N2... ) Query for enum with IS NULL fails with NullPointerException (org.hibernate.metamodel.mapping.JdbcMapping.getJdbcValueBinder()) ( https://hibernate.atlassian.net/browse/HHH-17006?atlOrigin=eyJpIjoiYTE0N2... ) Issue Type: Bug Affects Versions: 6.0.0, 6.2.7 Assignee: Unassigned Created: 27/Jul/2023 03:14 AM Priority: Major Reporter: Clemens Rüttermann ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=712020%... ) When creating a query with an enum as a parameter hibernate fails with the following exception java.lang.NullPointerException: Cannot invoke "org.hibernate.metamodel.mapping.JdbcMapping.getJdbcValueBinder()" because "jdbcMapping" is null This is a sample code to reproduce the bug: Query query = entityManager.createQuery("SELECT t from TestTbl AS t WHERE t.testEnum IS NULL AND :testEnum IS NULL"); query.setParameter("testEnum", TestEnum.VALUE_1); query.getResultList(); Also I created two repositories for Hibernate 5 and Hibernate 6 which show that this worked in Hibernate 5 but is failing in Hibernate 6: https://github.com/TheChronicler/hibernate5_enum_test_case/tree/master https://github.com/TheChronicler/hibernate6_enum_test_case Note that the exception is only thrown when the parameter is set to a value other than null ( https://hibernate.atlassian.net/browse/HHH-17006#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-17006#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100233- sha1:63d45e1 )