Hibernate + Derby: Comparisons between 'BOOLEAN' and 'INTEGER' are not supported

Question

I have a problem with querying Derby database. I am using Hibernate with JPA. Problem is related (probably) to boolean columns. Each query ends with error:

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Answer 1

Boolean datatype was added in Derby 10.7, you appear to be using 10.7 or newer so you should use the org.hibernate.dialect.DerbyTenSevenDialect dialect which adds Boolean support.