nhibernate通过组永久表联合的ROLLUP（）与组进行复杂的sql查询所有派生查询

Question

How would you convert the following sql that contains a case count, group by, union all to nhibernate? This complex sqql with a group by ROLLUP() of permanent table union all derived query columns

 select CASE WHEN GROUPING([BUSINESS_UNIT]) = 1 THEN 'Total' ELSE [BUSINESS_UNIT] END [BUSINESS_UNIT] , SUM(InjuryIllnessTtlCount) InjuryIllnessTtlCount from ( select i.INCIDENT_ID ,b.BUSINESS_UNIT ,case when (i.INJURY_ILLNESS_TYPE_ID=4 ) then 1 --'Injury/Illness (Near Miss with High Severity Potential)' else 0 end as InjuryIllnessTtlCount from tblIncident i join tblBUSINESS_UNIT b on i.BUS_UNIT_ID = b.BUS_UNIT_ID --where (CONVERT(varchar(10),i.create_dt, 111) between '2015/01/12' and '2015/05/12') union all select 0 incident_id ,b.BUSINESS_UNIT ,0 InjuryIllnessTtlCount from tblBUSINESS_UNIT b ) abc group by ROLLUP(abc.BUSINESS_UNIT) 

Answer 1

When it comes to this complicated queries, the conversion to NHibernate either not possible or does not worth it. So my two cents is to go with,

var query = <your query>;

var session = sessionFactory.OpenSession();
var result =session.CreateSQLQuery(query)
                .List();

Where the Query is directly executed.