[jira] [Created] (FLINK-11310) Convert predicates to IN or NOT_IN for Project

[Shang Yuanchun (Jira)]

Hequn Cheng created FLINK-11310:
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             Summary: 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 API & SQL
            Reporter: Hequn Cheng
            Assignee: Hequn Cheng


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 address the problem raised in FLINK-11308, as all predicates will be converted into one IN expression.



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