Hi Kant,

I suppose you refer to the stream join in SQL/Table API since the outer join 
for windowed-streams can always be achieved with the `JoinFunction` in 
DataStream API.

There are two kinds of stream joins, namely, the time-windowed join and the 
non-windowed join in Flink SQL/Table API [1, 2]. The time-windowed outer join 
has been supported since version 1.5 and the non-windowed outer join is still 
work in progress.

Hope that helps.



> On 7 Mar 2018, at 12:45 AM, kant kodali <kanth...@gmail.com> wrote:
> Hi All,
> Does Flink support stream-stream outer joins in the latest version?
> Thanks!

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