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https://issues.apache.org/jira/browse/SPARK-12644?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15082629#comment-15082629
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Apache Spark commented on SPARK-12644:
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User 'nongli' has created a pull request for this issue:
https://github.com/apache/spark/pull/10593
> Vectorize/Batch decode parquet
> ------------------------------
>
> Key: SPARK-12644
> URL: https://issues.apache.org/jira/browse/SPARK-12644
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Nong Li
> Assignee: Nong Li
>
> The parquet encodings are largely designed to decode faster in batches,
> column by column. This can speed up the decoding considerably.
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