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https://issues.apache.org/jira/browse/SPARK-8312?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Navis updated SPARK-8312:
-------------------------
Description:
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
was:
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 megastore 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
> 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
> 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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