SSIS SQL Task query adding Cross Join for no reason

I have the following UPDATE query:

    UPDATE    A
    SET       A.EARLY_SHIFT =
        (SELECT     DATEPART(hour, S.SCHED_START - A.FIRST_LOGIN) * 3600 
                  + DATEPART(minute, S.SCHED_START - A.FIRST_LOGIN) * 60 
                  + DATEPART(second, S.SCHED_START - A.FIRST_LOGIN) AS Expr1)
         FROM   DLY_AGT_ACTIVITY AS A
         INNER JOIN  DLY_AGT_SCHEDULES AS S
              ON A.DATE = S.DATE AND RIGHT(A.ID, 5) = RIGHT(S._ID, 5)

This in Management studio runs perfectly. However, in my sql task of my SSIS package, it adds a CROSS JOIN like so:

UPDATE A
    SET A.EARLY_SHIFT =
      (SELECT  DATEPART(hour, S.SCHED_START - A.FIRST_LOGIN) * 3600 
             + DATEPART(minute, S.SCHED_START - A.FIRST_LOGIN) * 60 
             + DATEPART(second, S.SCHED_START - A.FIRST_LOGIN) AS Expr1)
        FROM DLY_AGT_ACTIVITY AS A 
         INNER JOIN DLY_AGT_SCHEDULES AS S 
             ON A.DATE = S.DATE AND RIGHT(A.ID, 5) = RIGHT(S._ID, 5) CROSS JOIN A

And this makes the query fail in my sql task. What the heck is g开发者_高级运维oing on?

*I have tried running without any aliases, and this did not help.

I have restructured your update query, but it should give the same result.

UPDATE DLY_AGT_ACTIVITY
SET EARLY_SHIFT = DATEPART(hour, S.SCHED_START - FIRST_LOGIN) * 3600 
    + DATEPART(minute, S.SCHED_START - FIRST_LOGIN)                                                
    * 60 + DATEPART(second, S.SCHED_START - FIRST_LOGIN) 
FROM         DLY_AGT_SCHEDULES AS S 
WHERE   DLY_AGT_ACTIVITY.[DATE] = S.DATE 
AND     RIGHT(ID, 5) = RIGHT(S._ID, 5)

Can you try this in your package and let me know if it resolves the SSIS issue?