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https://issues.apache.org/jira/browse/SPARK-22383?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16223825#comment-16223825
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Apache Spark commented on SPARK-22383:
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User 'kiszk' has created a pull request for this issue:
https://github.com/apache/spark/pull/19601
> Generate code to directly get value of primitive type array from ColumnVector
> for table cache
> ---------------------------------------------------------------------------------------------
>
> Key: SPARK-22383
> URL: https://issues.apache.org/jira/browse/SPARK-22383
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.2.0
> Reporter: Kazuaki Ishizaki
>
> This JIRA generates the Java code to directly get a value for a primitive
> type array in ColumnVector without using an iterator for table cache (e.g.
> dataframe.cache). This JIRA improves runtime performance by eliminating data
> copy from column-oriented storage to {{InternalRow}} in a
> {{SpecificColumnarIterator}} iterator for primitive type.
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