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Posted to issues@flink.apache.org by "dalongliu (Jira)" <ji...@apache.org> on 2022/10/09 02:28:00 UTC

[jira] [Created] (FLINK-29551) Improving adaptive hash join by using sort merge join strategy per partition instead of all partitions

dalongliu created FLINK-29551:
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             Summary: Improving adaptive hash join by using sort merge join strategy per partition instead of all partitions 
                 Key: FLINK-29551
                 URL: https://issues.apache.org/jira/browse/FLINK-29551
             Project: Flink
          Issue Type: Improvement
          Components: Table SQL / Runtime
    Affects Versions: 1.16.0
            Reporter: dalongliu
             Fix For: 1.17.0


Currently, Regarding adaptive hash join, when falling back to sort-merge join, it sorts all partitions globally, however, due to the keys of each partition are disjoint, we can sort it per partition, which can improve the performance.



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