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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2020/07/03 02:21:00 UTC

[jira] [Commented] (SPARK-32163) Nested pruning should still work for nested column extractors of attributes with cosmetic variations

    [ https://issues.apache.org/jira/browse/SPARK-32163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17150678#comment-17150678 ] 

Apache Spark commented on SPARK-32163:
--------------------------------------

User 'viirya' has created a pull request for this issue:
https://github.com/apache/spark/pull/28988

> Nested pruning should still work for nested column extractors of attributes with cosmetic variations
> ----------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-32163
>                 URL: https://issues.apache.org/jira/browse/SPARK-32163
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: L. C. Hsieh
>            Assignee: L. C. Hsieh
>            Priority: Major
>
> If the expressions extracting nested fields have cosmetic variations like qualifier difference, currently nested column pruning cannot work well.
> For example, two attributes which are semantically the same, are referred in a query, but the nested column extractors of them are treated differently when we deal with nested column pruning.



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