0 Replies Latest reply: Aug 15, 2013 10:49 PM by Hysun RSS

    How does the [Range T] internally works?

    Hysun

      Hi,

       

      I am trying to understand how does the CQL [Range T] operator internally works.  Considering the following CQL:

          [ select stuId, count(1) from stuChannel [Range 10 seconds slide 5 seconds] group by stuId ]

      From the above CQL, we can get the stat value (count) of the latest portion of 10 seconds events every 5 seconds.

       

      My question is, for the following CQL, does it have a "default" slide? What the frequency of the stat value we can get?

         [ select stuId, count(1) from stuChannel [Range 10 seconds] group by stuId ]

       

      How does OEP trigger the processor internally? All time-based?

       

      Thanks, Hysun