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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2015/06/11 23:40:00 UTC

[jira] [Assigned] (SPARK-8312) Populate statistics info of hive tables if it's needed to be

     [ https://issues.apache.org/jira/browse/SPARK-8312?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-8312:
-----------------------------------

    Assignee: Apache Spark

> Populate statistics info of hive tables if it's needed to be
> ------------------------------------------------------------
>
>                 Key: SPARK-8312
>                 URL: https://issues.apache.org/jira/browse/SPARK-8312
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Navis
>            Assignee: Apache Spark
>            Priority: Minor
>
> Currently, spark-sql uses stats in metastore for estimating size of hive table, which means analyze command should be executed before accessing the table for better planning especially for joins. But still with the stats, it cannot reflect real input size of the query when partition prunning predicate exists in it.
> Even worse is that hive cannot update metastore stats for external tables, which is fixed recently in HIVE-6727. The issue detail says the bug is applied to all hive version between 0.13.0 and 1.2.0



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