Hi, We are evaluating different streaming platforms. For a typical join between two streams
select a.*, b.* FROM a, b ON a.id == b.id How does flink implement the join? The matching record from either stream can come late, we consider it's a valid join as long as the event time for record a and b are in the same day. I think some streaming platform (e.g. google data flow) will store the records from both streams in a K/V lookup store and later do the lookup. Is this how flink implement the streaming join? If we need to store all the records in a state store, that's going to be a lots of records for a day.
