[jira] [Commented] (SPARK-21217) Support ColumnVector.Array.toArray()

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-21217?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16063631#comment-16063631 ] 

Apache Spark commented on SPARK-21217:
--------------------------------------

User 'kiszk' has created a pull request for this issue:
https://github.com/apache/spark/pull/18425

> Support ColumnVector.Array.to<type>Array()
> ------------------------------------------
>
>                 Key: SPARK-21217
>                 URL: https://issues.apache.org/jira/browse/SPARK-21217
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.3.0
>            Reporter: Kazuaki Ishizaki
>
> When {{to<type>Array()}} in {{ColumnVector.Array}} (e.g. {{toIntArray()}}) is called, the generic method in {{ArrayData}} is called. It is not fast since element-wise copy is performed.
> This JIRA entry implements bulk-copy for these methods in {{ColumnVector.Array}} by using {{System.arrayCopy()}} or {{Platform.copyMemory()}}.



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