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Posted to issues@spark.apache.org by "Davies Liu (JIRA)" <ji...@apache.org> on 2016/03/01 22:08:18 UTC

[jira] [Resolved] (SPARK-13582) Improve performance of parquet reader with dictionary encoding

     [ https://issues.apache.org/jira/browse/SPARK-13582?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Davies Liu resolved SPARK-13582.
--------------------------------
       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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