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Posted to issues@spark.apache.org by "Hyukjin Kwon (JIRA)" <ji...@apache.org> on 2016/10/08 11:36:20 UTC
[jira] [Commented] (SPARK-9783) Use SqlNewHadoopRDD in JSONRelation
to eliminate extra refresh() call
[ https://issues.apache.org/jira/browse/SPARK-9783?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15557810#comment-15557810 ]
Hyukjin Kwon commented on SPARK-9783:
-------------------------------------
[~lian cheng][~yhuai] I believe this is closable. Do you mind if I ask to confirm this?
> Use SqlNewHadoopRDD in JSONRelation to eliminate extra refresh() call
> ---------------------------------------------------------------------
>
> Key: SPARK-9783
> URL: https://issues.apache.org/jira/browse/SPARK-9783
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.5.0
> Reporter: Cheng Lian
> Assignee: Cheng Lian
>
> PR #8035 made a quick fix for SPARK-9743 by introducing an extra {{refresh()}} call in {{JSONRelation.buildScan}}. Obviously it hurts performance. To overcome this, we can use {{SqlNewHadoopRDD}} there and override {{listStatus()}} to inject cached {{FileStatus}} instances, similar as what we did in {{ParquetRelation}}.
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