[jira] [Commented] (SPARK-9272) Persist information of individual partitions when persisting partitioned data source tables to metastore

["Daniel Tomes (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-9272?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15953582#comment-15953582 ] 

Daniel Tomes commented on SPARK-9272:
-------------------------------------

BUMP

This is an important issue. Let's get this resolved.

> Persist information of individual partitions when persisting partitioned data source tables to metastore
> --------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-9272
>                 URL: https://issues.apache.org/jira/browse/SPARK-9272
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 1.5.0
>            Reporter: Cheng Lian
>
> Currently, when a partitioned data source table is persisted to Hive metastore, we only persist its partition columns. Information about individual partitions are not persisted. This forces us to do a partition discovery before reading a persisted partitioned table, which hurts performance.
> To fix this issue, we may persist partition information into metastore. Specifically, the format should be compatible with Hive to ensure interoperability.
> One of the approach to collect partition values and partition directory path for dynamicly partitioned tables is to use accumulators to collect expected information during the write job.



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