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https://issues.apache.org/jira/browse/FLINK-5725?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15856439#comment-15856439
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Fabian Hueske commented on FLINK-5725:
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Hi [~wheat9], this is actually a pretty big task with probably several
subtasks.
There are many different possible semantics to do a join between two streams
with widely varying complexity.
See for instance this recent discussion on the dev mailing list:
http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/STREAM-SQL-inner-queries-td15585.html
I think it makes sense to start discussing the semantics of streaming joins,
but I would wait until some of the other Stream SQL issues like OVER windows,
GROUP windows, retraction / dynamic tables have made some progress before
starting the an implementation.
Best, Fabian
> Support JOIN between two streams in the SQL API
> -----------------------------------------------
>
> Key: FLINK-5725
> URL: https://issues.apache.org/jira/browse/FLINK-5725
> Project: Flink
> Issue Type: New Feature
> Components: Table API & SQL
> Reporter: Haohui Mai
> Assignee: Haohui Mai
>
> As described in the title.
> This jira proposes to support joining two streaming tables in the SQL API.
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