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https://issues.apache.org/jira/browse/SPARK-13582?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Davies Liu resolved SPARK-13582.
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Resolution: Fixed
Fix Version/s: 2.0.0
Issue resolved by pull request 11437
[https://github.com/apache/spark/pull/11437]
> Improve performance of parquet reader with dictionary encoding
> --------------------------------------------------------------
>
> Key: SPARK-13582
> URL: https://issues.apache.org/jira/browse/SPARK-13582
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Davies Liu
> Assignee: Davies Liu
> Fix For: 2.0.0
>
>
> Right now, we replace the ids with value from a dictionary before accessing a
> column. We could defer that, especially when some rows are filtered out, we
> will not lookup this dictionary for those rows.
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