Support window function over global aggregation for UDA

[gangtao]

I am running a tumble window on a UDA output, which returns an error

Not implemented. Code: 48. DB::Exception: Streaming query doesn't support window func over a global aggregation. (NOT_IMPLEMENTED) (version 1.3.31).

Use case

In my case, I am running a tumble window on a output of UDA to caculate what is the throughput of the UDA.

Describe the solution you'd like
support query like this

WITH o AS
  (
    SELECT
      order_update(_tp_time, OrderId, Symbol, Side, OrderQty, OrderType, Price) AS Orders
    FROM
      Orders
  )
SELECT
  window_start, count(*)
FROM
  tumble(o, now(), 1s)
GROUP BY
  window_start

Describe alternatives you've considered

Additional context