Jonas Gernot Steinke ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=712020%... ) *commented* on HHH-16858 ( https://hibernate.atlassian.net/browse/HHH-16858?atlOrigin=eyJpIjoiYTk3Zm... ) Re: Can't compare test expression of type [BasicSqmPathSource(type : Enum)] with element of type [basicType(a)5(java.lang.Integer,4)] ( https://hibernate.atlassian.net/browse/HHH-16858?atlOrigin=eyJpIjoiYTk3Zm... ) The comparison with < in this example is only to show that comparison operators ( = , < , > , >= , <= , <> ) do not work in this case. In the example I use EnumType.ORDINAL , in the other case of EnumType ( https://docs.jboss.org/hibernate/orm/current/userguide/html_single/Hibern... ) EnumType.STRING a similar error occurs: Error interpreting query [SELECT b FROM ItemB b WHERE b.type = 'B2']; this may indicate a semantic (user query) problem or a bug in the parser [SELECT b FROM ItemB b WHERE b.type = 'B2'] Can't compare test expression of type [BasicSqmPathSource(type : Enum)] with element of type [basicType(a)15(java.lang.String,12)] The question is, why does it work with ItemA: public interface ItemARepository extends JpaRepository<ItemA, Long >, JpaSpecificationExecutor<ItemA> { @Query( "SELECT a FROM ItemA a WHERE a.type < 1" ) List<ItemA> findAllByTypeA2(); } https://github.com/JGSteinke/hibernate-test/blob/main/src/main/java/de/hi... As I wrote before, it has only stopped working since the Hibernate update. My guess is that in case A the enum is compared depending on the EnumType ( EnumType.ORDINAL as Integer or EnumType.STRING as String) and in case B this does not happen. The question of sense of compare enums using < is not at issue here, but I would like to discuss it briefly. In this way you can, for example, find all entries that precede a certain status. ( https://hibernate.atlassian.net/browse/HHH-16858#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16858#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#100227- sha1:3bc807d )