Erwan Leroux ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=6218b52... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiNGUzMDk1ZTY1... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16375?atlOrigin=eyJpIjoiNGUzMD... ) HHH-16375 ( https://hibernate.atlassian.net/browse/HHH-16375?atlOrigin=eyJpIjoiNGUzMD... ) java.lang.ClassCastException when using @Enumerated(STRING) with length=1 on varchar column ( https://hibernate.atlassian.net/browse/HHH-16375?atlOrigin=eyJpIjoiNGUzMD... ) Issue Type: Bug Affects Versions: 6.1.7 Assignee: Unassigned Components: hibernate-core Created: 26/Mar/2023 08:21 AM Environment: Tested on java 17 and Spring Boot 3.0.5 Priority: Major Reporter: Erwan Leroux ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=6218b52... ) After upgrading to Spring Boot 3 and Hibernate 6, I have a use case not working about an enum : @Column(name = "way", length = 1) @Enumerated(EnumType.STRING) private Way way; // Forward(Aller in french), Backward(Retour in french) public enum Way {A,R} CREATE TABLE working ( id VARCHAR PRIMARY KEY NOT NULL, way VARCHAR(1) ); It throws this exception : Expecting code not to raise a throwable but caught "org.springframework.transaction.TransactionSystemException: Could not commit JPA transaction ... at fr.elendar.hibernate_enum_mvce.repository.EntityClassNotWorkingRepositoryTest.lambda$test_ko$0(EntityClassNotWorkingRepositoryTest.java:22) at org.assertj.core.api.ThrowableAssert.catchThrowable(ThrowableAssert.java:63) at org.assertj.core.api.AssertionsForClassTypes.catchThrowable(AssertionsForClassTypes.java:892) at org.assertj.core.api.AssertionsForClassTypes.assertThatCode(AssertionsForClassTypes.java:863) at org.assertj.core.api.Assertions.assertThatCode(Assertions.java:1287) at fr.elendar.hibernate_enum_mvce.repository.EntityClassNotWorkingRepositoryTest.test_ko(EntityClassNotWorkingRepositoryTest.java:18) ... Caused by: jakarta.persistence.RollbackException: Error while committing the transaction at org.hibernate.internal.ExceptionConverterImpl.convertCommitException(ExceptionConverterImpl.java:83) at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:104) at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:561) ... 104 more Caused by: java.lang.ClassCastException: class java.lang. String cannot be cast to class java.lang. Character (java.lang. String and java.lang. Character are in module java.base of loader 'bootstrap' ) at org.hibernate.type.descriptor.java.CharacterJavaType.unwrap(CharacterJavaType.java:20) at org.hibernate.type.descriptor.jdbc.VarcharJdbcType$1.doBind(VarcharJdbcType.java:97) at org.hibernate.type.descriptor.jdbc.BasicBinder.bind(BasicBinder.java:63) ... ... 105 more I debugged it to this class and commit : https://github.com/hibernate/hibernate-orm/commit/2f8f04747b5a4555836d5b7... ( https://github.com/hibernate/hibernate-orm/commit/2f8f04747b5a4555836d5b7... ) and was told on Zulip Chat ( https://hibernate.zulipchat.com/#narrow/stream/132096-hibernate-user/topi... ) to create a bug here. I made a reproducer here ( https://github.com/ErwanLeroux/hibernate_enum_mvce ) , the test case in EntityClassNotWorkingRepositoryTest.java ( https://github.com/ErwanLeroux/hibernate_enum_mvce/blob/main/src/test/jav... ) is failling and show the exception. I hope it’s enough, I tried to make a test case directly in hibernate-core and submit a PR, but I lacked enough knownleged to make it work 🙂 ( https://hibernate.atlassian.net/browse/HHH-16375#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16375#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#100219- sha1:ac3e918 )