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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2022/04/19 05:03:00 UTC

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

     [ https://issues.apache.org/jira/browse/SPARK-38932?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-38932:
------------------------------------

    Assignee: Apache Spark

> 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
>            Assignee: Apache Spark
>            Priority: Major
>
> 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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