CreateQuery上的EntitySqlException和类型不匹配

Question

I have this situation. I call CreateQuery with this query and I get Exception.

string sql = "SELECT VALUE CP 
                FROM CIC_PRODUZIONE_OPERAZIONI_View AS CP 
                WHERE  CP.CD_PLANT = 5 
                   AND CP.CD_POSTI = 10946 
                   AND (CP.FL_STATE IN {N'D',N'N',N'M'}) 
                   AND EXISTS (SELECT 1 
                               FROM CIC_OPERAZIONI AS C 
                               WHERE CP.CD_CIC_PRODUZIONE = C.CD_CIC_PRODUZIONE 
                                  AND C.CD_POSTI = 10894 
                                  AND C.AFCDOPER = (SELECT VALUE TOP (1) D.AFCDOPER                                                                     FROM CIC_OPERAZIONI AS D
    WHERE D.CD_CIC_PRODUZIONE = CP.CD_CIC_PRODUZIONE 
      AND D.AFCDOPER > CP.AFCDOPER 
    ORDER BY D.AFCDOPER)) 
    ORDER BY CP.AFCDPROD, CP.FL_STATE, CP.AFESPSAP, CP.AFESPMOD, CP.AFCDOPER";

    ObjectQuery<T> entities = CreateQuery<T>(sql);

This is the Exception:

EntitySqlException: The argument types 'Edm.Decimal' and 'Transient.collection[Edm.Decimal(Nullable=True,DefaultValue=,Precision=4,Scale=0)]' are incompatible for this operation.

The problem seems to be when I try to select the TOP value.

Any suggestion?

EDIT

I undestand that the problem is on the right side of the expression because the subquery get an ICollection<decimal> and on the left I have a decimal field.

...

C.AFCDOPER = (SELECT VALUE TOP (1) D.AFCDOPER                                                                     FROM CIC_OPERAZIONI AS D
        WHERE D.CD_CIC_PRODUZIONE = CP.CD_CIC_PRODUZIONE 
          AND D.AFCDOPER > CP.AFCDOPER

...

how could it be possible to get the "First" of that collection to avoid to get in exception?

Answer 1

Did you try ?

Select Top(1) D.AFCDOPER   FROM CIC_OPERAZIONI AS D

I think this will work without the world "VALUE" .