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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/05/17 17:32:13 UTC

[jira] [Assigned] (SPARK-15365) Metastore relation should fallback to HDFS size if statistics are not available from table meta data.

     [ https://issues.apache.org/jira/browse/SPARK-15365?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-15365:
------------------------------------

    Assignee:     (was: Apache Spark)

> Metastore relation should fallback to HDFS size if statistics are not available from table meta data.
> -----------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-15365
>                 URL: https://issues.apache.org/jira/browse/SPARK-15365
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Parth Brahmbhatt
>
> Currently if a table is used in join operation we rely on Metastore returned size to calculate if we can convert the operation to Broadcast join. This optimization only kicks in for table's that have the statics available in metastore. Hive generally rolls over to HDFS if the statistics are not available directly from metastore and this seems like a reasonable choice to adopt given the optimization benefit of using broadcast joins.



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