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From "Lefty Leverenz (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9588) Reimplement HCatClientHMSImpl.dropPartitions() with HMSC.dropPartitions()
Date Mon, 09 Mar 2015 07:30:38 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14352634#comment-14352634
] 

Lefty Leverenz commented on HIVE-9588:
--------------------------------------

Doc note:  This adds *hive.metastore.client.drop.partitions.using.expressions* to HiveConf.java,
so it needs to be documented for 1.2.0 in the Metastore section of Configuration Properties.

* [Configuration Properties -- Metastore | https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-MetaStore]

> Reimplement HCatClientHMSImpl.dropPartitions() with HMSC.dropPartitions()
> -------------------------------------------------------------------------
>
>                 Key: HIVE-9588
>                 URL: https://issues.apache.org/jira/browse/HIVE-9588
>             Project: Hive
>          Issue Type: Bug
>          Components: HCatalog, Metastore, Thrift API
>    Affects Versions: 0.14.0
>            Reporter: Mithun Radhakrishnan
>            Assignee: Mithun Radhakrishnan
>              Labels: TODOC1.2
>             Fix For: 1.2.0
>
>         Attachments: HIVE-9588.1.patch, HIVE-9588.2.patch, HIVE-9588.3.patch, HIVE-9588.4.patch
>
>
> {{HCatClientHMSImpl.dropPartitions()}} currently has an embarrassingly inefficient implementation.
The partial partition-spec is converted into a filter-string. The partitions are fetched from
the server, and then dropped one by one.
> Here's a reimplementation that uses the {{ExprNode}}-based {{HiveMetaStoreClient.dropPartitions()}}.
It cuts out the excessive back-and-forth between the HMS and the client-side. It also reduces
the memory footprint (from loading all the partitions that are to be dropped). 



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