在h2数据库中使用datediff（）时出现语法错误

Question

我在H2数据库中使用datediff（）函数时遇到了问题。 这是查询

String FIND_WORK_UNIT_BY_PART_UUID_AND_STATUS = "select new com.altissia.erasmus.domain.WorkUnitCustomObject(workUnit.studyLg," + "(datediff(workUnit.endTime , workUnit.startTime))) from V2WorkUnit workUnit where workUnit.workUnitState.status = 'PENDING' and workUnit.part.uuid =:partUuid order by workUnit.studyLg";
List<WorkUnitCustomObject> workUnitWithLateDays = entityManeger                .createQuery(FIND_WORK_UNIT_BY_PART_UUID_AND_STATUS).setParameter("partUuid", partUuid).getResultList();

以下是例外：

  

引起：org.h2.jdbc.JdbcSQLException：SQL语句中的语法错误“select v2workunit0_.study_lg as col_0_0_，datediff（v2workunit0_.end_time，v2workunit0_.start_time）[*]

以下是应用程序ymll文件中的JPA属性

jpa:
        packages.to.scan: com.altissia.erasmus.domain
        database-platform: org.hibernate.dialect.H2Dialect
        connection.driver_class: org.h2.Driver
        database: H2
        openInView: false
        show_sql: true
        generate-ddl: true
        hibernate:
            ddl-auto: ""
            naming-strategy: org.hibernate.cfg.EJB3NamingStrategy
        properties:
            hibernate.cache.use_second_level_cache: false
            hibernate.cache.use_query_cache: false
            hibernate.generate_statistics: true

提前谢谢