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https://issues.apache.org/jira/browse/SPARK-12992?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15116384#comment-15116384
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Apache Spark commented on SPARK-12992:
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User 'nongli' has created a pull request for this issue:
https://github.com/apache/spark/pull/10908
> Vectorize parquet decoding using ColumnarBatch
> ----------------------------------------------
>
> Key: SPARK-12992
> URL: https://issues.apache.org/jira/browse/SPARK-12992
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Nong Li
>
> Parquet files benefit from vectorized decoding. ColumnarBatches have been
> designed to support this. This means that a single encoded parquet column is
> decoded to a single ColumnVector.
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