query on CSUM - response (13) by dnoeth

EXPAND only works on PERIODs, you have to construct one on the fly.

SELECT name, newdate, 
   SUM(CASE WHEN datecol = newdate  THEN measure ELSE 0 END) 
   OVER (PARTITION BY name
         ORDER BY newdate 
         ROWS UNBOUNDED PRECEDING)
FROM
(
   SELECT name, measure, datecol, BEGIN(pd2) AS newdate
   FROM 
    (
      SELECT
         name, datecol, measure, 
         PERIOD(datecol,
                COALESCE(MIN(datecol) 
                         OVER (PARTITION BY name 
                               ORDER BY datecol 
                               ROWS BETWEEN 1 FOLLOWING AND 1 FOLLOWING), CURRENT_DATE)) AS pd
      FROM tab
    ) AS dt
   EXPAND ON pd AS pd2 BY INTERVAL '1' DAY
   FOR PERIOD(DATE '2013-07-01', DATE '2013-07-04')
 ) AS dt

Of course this will still require lots of resources and might return much more than your original 139M rows.
I did something like this, but only for a small subsets of rows. i.e. displaying for end users.
Why do you need it for all rows?
Dieter