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https://issues.apache.org/jira/browse/FLINK-8918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16394817#comment-16394817
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Sihua Zhou commented on FLINK-8918:
-----------------------------------
Hi [~fhueske] could you please have a look at this after flink 1.5 is released ?
> Introduce Runtime Filter Join
> -----------------------------
>
> Key: FLINK-8918
> URL: https://issues.apache.org/jira/browse/FLINK-8918
> Project: Flink
> Issue Type: Bug
> Components: Table API & SQL
> Reporter: Sihua Zhou
> Assignee: Sihua Zhou
> Priority: Major
> Fix For: 1.6.0
>
>
> Right now, for every record that need to be joined, we need to query both
> `left stream's state` and `right stream's state`. I proposal to introduce RF
> join to reduce the `query count` of state, which could improve the
> performance of `stream join`, especially when the joined rate is low. A
> simple description for RF join can be found
> [here|https://www.cloudera.com/documentation/enterprise/5-9-x/topics/impala_runtime_filtering.html]
> (even though it not for stream join original, but we can easily refer it to
> `stream join`).
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