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https://issues.apache.org/jira/browse/FLINK-11310?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Flink Jira Bot updated FLINK-11310:
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Labels: pull-request-available stale-assigned (was: pull-request-available)
> Convert predicates to IN or NOT_IN for Project
> ----------------------------------------------
>
> Key: FLINK-11310
> URL: https://issues.apache.org/jira/browse/FLINK-11310
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / API
> Reporter: Hequn Cheng
> Assignee: Hequn Cheng
> Priority: Major
> Labels: pull-request-available, stale-assigned
> Time Spent: 20m
> Remaining Estimate: 0h
>
> In FLINK-10474, we force translate IN into a predicate to avoid translating
> to a JOIN. In addition, we add a Rule to convert the predicates back to IN so
> that we can generate code using a HashSet for the IN.
> However, FLINK-10474 only takes Filter into consideration. It would be great
> to also convert predicates in Project to IN. It not only will improve the
> performance for the Project, but also will avoid the problem raised in
> FLINK-11308, as all predicates will be converted into one IN expression.
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