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Posted to issues@spark.apache.org by "XiDuo You (Jira)" <ji...@apache.org> on 2022/04/18 09:24:00 UTC

[jira] [Created] (SPARK-38932) Datasource v2 support report unique keys

XiDuo You created SPARK-38932:
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             Summary: Datasource v2 support report unique keys
                 Key: SPARK-38932
                 URL: https://issues.apache.org/jira/browse/SPARK-38932
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.4.0
            Reporter: XiDuo You


Datasource v2 can be used to connect to some databases who support [*unique key*|https://en.wikipedia.org/wiki/Unique_key].

Spark catalyst optimizer support do further optimization through unique keys. So it can improve the performance if the Scan reports its unique keys to Spark.



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