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https://issues.apache.org/jira/browse/SPARK-18572?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Allman updated SPARK-18572:
-----------------------------------
Description:
Currently Spark answers the {{SHOW PARTITIONS}} query by fetching all of the
table's partition metadata from the external catalog and constructing partition
names therefrom. The Hive client has a {{getPartitionNames}} method which is
orders of magnitude faster, with the performance improvement scaling up with
the number of partitions in the table. I believe we can use this method to
great effect.
Further details are provided in the associated PR.
was:
Currently Spark answers the {{SHOW PARTITIONS}} query by fetching all of the
table's partition metadata from the external catalog and constructing partition
names therefrom. The Hive client has a {{getPartitionNames}} method which is
orders of magnitude faster, with the performance improvement scaling up with
the number of partitions in the table. I believe we can use this method to
great effect.
Further details are provided in the associated PR (coming shortly).
> Use the hive client method "getPartitionNames" to answer "SHOW PARTITIONS"
> queries on partitioned Hive tables
> -------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-18572
> URL: https://issues.apache.org/jira/browse/SPARK-18572
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Michael Allman
>
> Currently Spark answers the {{SHOW PARTITIONS}} query by fetching all of the
> table's partition metadata from the external catalog and constructing
> partition names therefrom. The Hive client has a {{getPartitionNames}} method
> which is orders of magnitude faster, with the performance improvement scaling
> up with the number of partitions in the table. I believe we can use this
> method to great effect.
> Further details are provided in the associated PR.
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