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From "Cheng Lian (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-9783) Use SqlNewHadoopRDD in JSONRelation to eliminate extra refresh() call
Date Mon, 10 Aug 2015 18:00:45 GMT

     [ https://issues.apache.org/jira/browse/SPARK-9783?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Cheng Lian updated SPARK-9783:
------------------------------
         Sprint: Spark 1.5 doc/QA sprint
    Environment:     (was: 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}}.)
    Description: 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}}.

> 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
>            Priority: Blocker
>
> 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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