Hibernate 5.4: best practices for 'could not extract ResultSet' when using @Transactional with Query DSL?
I'm learning this framework and I'm a bit lost with I'm updating my dependencies and I'm working on a personal project and I'm working with an scenario in my Spring Boot application where I'm using Hibernate 5.4 alongside Query DSL for building dynamic queries..... When I run a specific transaction that fetches entities based on complex criteria, I encounter the following behavior: `org.hibernate.exception.SQLGrammarException: could not extract ResultSet`. This happens only during a method annotated with `@Transactional`. Here's a simplified version of the code I'm using: ```java @Service public class UserService { @Autowired private EntityManager entityManager; @Transactional public List<User> getUsersByCriteria(String status, LocalDate startDate) { QUser user = QUser.user; JPQLQuery<User> query = new JPAQuery<>(entityManager); return query.select(user) .from(user) .where(user.status.eq(status) .and(user.createdDate.goe(startDate))) .fetch(); } } ``` The database tables involved are correctly mapped, and the SQL generated from Query DSL looks fine; however, the behavior continues. I've tried enabling Hibernate SQL logging and noticed the generated query in the log, but it doesn't seem to indicate any obvious issues: ``` select this_.id as id1_0_, this_.status as status2_0_, this_.created_date as created_date3_0_ from users this_ where this_.status=? and this_.created_date>=? ``` I've also ensured that the database connection settings in `application.properties` are correct, and I tested the SQL directly in the database client, which works without problems. Additionally, I tried catching the exception and logging the SQL behavior code, but nothing out of the ordinary was found. My entity mappings are done correctly with appropriate annotations, and I've checked for any possible database constraints that might be violated. Any advice on what could be going wrong here or how to further debug this scenario would be greatly appreciated! Any help would be greatly appreciated! Thanks for your help in advance!