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Posted to issues@flink.apache.org by "Leonard Xu (Jira)" <ji...@apache.org> on 2019/11/06 06:54:00 UTC

[jira] [Created] (FLINK-14625) Eliminate cross join in multi join to reduce cost

Leonard Xu created FLINK-14625:
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             Summary: Eliminate cross join in multi join to reduce cost 
                 Key: FLINK-14625
                 URL: https://issues.apache.org/jira/browse/FLINK-14625
             Project: Flink
          Issue Type: Improvement
          Components: Table SQL / Planner
    Affects Versions: 1.9.1
            Reporter: Leonard Xu


cross join always has  higher cost than other joins, if we can eliminate cross join in multi join scene as much as possible，we can obtain  better performance.



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