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Posted to issues@spark.apache.org by "Sean R. Owen (Jira)" <ji...@apache.org> on 2021/10/24 12:39:00 UTC

[jira] [Resolved] (SPARK-37037) Improve byte array sort by unify compareTo function of UTF8String and ByteArray

     [ https://issues.apache.org/jira/browse/SPARK-37037?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean R. Owen resolved SPARK-37037.
----------------------------------
    Fix Version/s: 3.3.0
       Resolution: Fixed

Issue resolved by pull request 34310
[https://github.com/apache/spark/pull/34310]

> Improve byte array sort by unify compareTo function of UTF8String and ByteArray 
> --------------------------------------------------------------------------------
>
>                 Key: SPARK-37037
>                 URL: https://issues.apache.org/jira/browse/SPARK-37037
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.3.0
>            Reporter: XiDuo You
>            Priority: Minor
>             Fix For: 3.3.0
>
>
> BinaryType use `TypeUtils.compareBinary` to compare two byte array, however it's slow since it compares byte array using unsigned int comparison byte by bye.
> We can compare them using `Platform.getLong` with unsigned long comparison if they have more than 8 bytes. And here is some histroy about this `TODO`  [https://github.com/apache/spark/pull/6755/files#r32197461 .|https://github.com/apache/spark/pull/6755/files#r32197461]



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