Partial updates with Update Stream Decorator

[Dan Rosher]

Hi,

Is it possible to do partial/atomic or in-place updates with  Update
Streaming expression Decorator? The following simply overwrites.

 update(collection1,
        select(
        search(collection1,
               q=*:*,
               qt="/export",
               fl="id,a_s,a_i,a_f,s_multi,i_multi",
               sort="a_f asc, a_i asc"))
        ,id,a_s)

Thanks,
Dan