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https://issues.apache.org/jira/browse/FLINK-32831?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lijie Wang closed FLINK-32831.
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Fix Version/s: 1.18.0
1.19.0
Resolution: Fixed
> RuntimeFilterProgram should aware join type when looking for the build side
> ---------------------------------------------------------------------------
>
> Key: FLINK-32831
> URL: https://issues.apache.org/jira/browse/FLINK-32831
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Affects Versions: 1.18.0
> Reporter: Lijie Wang
> Assignee: Lijie Wang
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.18.0, 1.19.0
>
>
> Currently, runtime filter program will try to look for an {{Exchange}} as
> build side to avoid affecting {{MultiInput}}. It will try to push down the
> runtime filter builder if the original build side is not {{Exchange}}.
> Currenlty, the builder-push-down does not aware the join type, which may lead
> to incorrect results(For example, push down the builder to the right input of
> left-join).
> We should only support following cases:
> 1. Inner join: builder can push to left + right input
> 2. semi join: builder can push to left + right input
> 3. left join: builder can only push to the left input
> 4. right join: builder can only push to the right input
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