Re: join in sql without time interval

Posted by lec ssmi on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/join-in-sql-without-time-interval-tp34840p34859.html

Thanks, but is the bottom layer of the table API really implemented like this?

Konstantin Knauf <[hidden email]> 于 2020年4月30日周四 22:02写道：

Hi Lec Ssmi, 

yes, Dastream#connect on two streams both keyed on the productId with a KeyedCoProcessFunction is the way to go.

Cheers, 

Konstantin

On Thu, Apr 30, 2020 at 11:10 AM lec ssmi <[hidden email]> wrote:

Maybe,  the connect method?  

lec ssmi <[hidden email]> 于2020年4月30日周四 下午3:59写道：

Hi:

  As  the following sql:

   SELECT *  FROM Orders INNER JOIN Product ON Orders.productId = Product.id

 If we use datastream API instead  of sql, how should it be achieved?

 Because the APIs in DataStream only have Window Join and Interval Join，the official website says that to solve the above state capacity problem in sql is using TableConfig. But TableConfig itself can only solve the state  ttl  problem of non-time operators. So I think the above sql's  implementation is neither tumble window join, nor sliding window join and interval join.

 

Best Regards

Lec Ssmi

--

Konstantin Knauf

https://twitter.com/snntrable

https://github.com/knaufk