Hibernate GROUP BY汇总字段

Question

我已升级到2.1版，并被迫从与投影配合使用的本机查询中移出。 所以现在当我尝试执行以下查询时：

@Query(value = "SELECT new com.core.model.CoreCountByDateQueryResult( DATE_FORMAT(s.detectedAt, '%Y-%m-%d') as datetime " +
        ", count(*)) "+
        " from CoreSession s " +
        " where s.uid.uid =  :uid " +
        " and s.sessionType = :sessionType " +
        " and date( s.detectedAt ) >= :startDate" +
        " and date( s.detectedAt ) <= :endDate " +
        "    group by datetime")
List<CoreCountByDateQueryResult> getSessionCountByType(@Param("uid") Long uid,
                                                       @Param("sessionType") SessionType sessionType,
                                                       @Param("startDate")Date startDate,
                                                       @Param("endDate") Date endDate);


@Data
public class CoreCountByDateQueryResult {
/**
 * Watch time stamp
 * @return watchTimeUTC
 */
private String datetime;

/**
 * steps_count
 * @return
 */
private long count;

public CoreCountByDateQueryResult(String datetime, long count) {
    this.datetime = datetime;
    this.count = count;
}

}

我收到未找到 datetime 的错误

  

java.sql.SQLSyntaxErrorException：“组语句”中的未知列“ datetime”

我该如何解决？