在Hibernate中将两个SQL查询调用合并为一个

Question

I have a stored procedure named find_slow_persons() that returns a table with two columns:

RETURNS TABLE(
        person_id           BIGINT,
        time_late_by        DOUBLE PRECISION
        )

and with Hibernate, I can obtain these 2 column's values as List with 2 calls:

 SQLQuery query =
                session.createSQLQuery("select * from find_slow_persons()").addScalar("person_id", LongType.INSTANCE);

 SQLQuery time =
                session.createSQLQuery("select * from find_slow_persons()").addScalar("time_late_by",
                        LongType.INSTANCE);
List<Long> duplicateDataPointIds = query.list();
List<Long> timeBy = time.list();

Now I got the 2 lists of the data I want, is there a way to combine these 2 and only make 1 query ?

Answer 1

Is there a reason you're separating the column into two queries? The following should have the desired effect if not:

session.createSQLQuery("select * from find_slow_persons()")
               .addScalar("person_id", LongType.INSTANCE)
               .addScalar("time_late_by", LongType.INSTANCE)
// returns an object[] List you'll have to unpack
List duplicateDataPointIds = query.list();