Hi miaoyuan, > First question I didn't quite catch your meaning. There are some documents about using window in sql[1] or table-api[2] and it is worth to take a look.
> Second question Group by window without other keys results a AllWindowedStream. Sql like bellow: > SELECT COUNT(*) > , TUMBLE_START(rowtime, INTERVAL '15' MINUTE) > , TUMBLE_END(rowtime, INTERVAL '15' MINUTE) > FROM MyTable > GROUP BY TUMBLE(rowtime, INTERVAL '15' MINUTE) > Third question You can print or sink data into external storages and compare the result. Best, Hequn [1] https://ci.apache.org/projects/flink/flink-docs-master/dev/table/sql.html#group-windows [2] https://ci.apache.org/projects/flink/flink-docs-master/dev/table/tableApi.html#group-windows On Thu, Aug 16, 2018 at 2:26 PM, 苗元君 <miaoyuan...@gmail.com> wrote: > Hi, Flink guys, > U really to a quick release, it's fantastic ! > > I'v got a situation , > window 1 is time driven, slice is 1min, trigger is 1 count > window 2 is count driven, slice is 3 count, trigger is 1count > > 1. Then element is out of window1 and just right into window2. > For example if there is only 2 element, window2 will have none > element. * how to build window like this ? * > I try to use window1 by structure (window trigger evictor) then window2 > structure(trigger evictor) > I got element calculate just in window1 and window2 in the same time > > 2. I try to find ways to use SQL on AllWindowedStream but seem not > working. Can SQL Query use on a WINDOW ? > 3. How to compare these SQL result ? > > > [image: image.png] > > Thank U so much. > > -- > > *Yuanjun Miao* >
