Gavin King ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *commented* on HHH-17006 ( https://hibernate.atlassian.net/browse/HHH-17006?atlOrigin=eyJpIjoiOGU5MG... ) Re: Query for enum with IS NULL fails with NullPointerException (org.hibernate.metamodel.mapping.JdbcMapping.getJdbcValueBinder()) ( https://hibernate.atlassian.net/browse/HHH-17006?atlOrigin=eyJpIjoiOGU5MG... ) I tried this out. To be clear, the error is associated with the expression involving the parameter, i.e. :testEnum IS NULL , not with the expression t.testEnum IS NULL , which works fine. ( 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 )