Sihua Zhou created FLINK-8918: --------------------------------- Summary: 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 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`). -- This message was sent by Atlassian JIRA (v7.6.3#76005)