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From "Rajesh Balamohan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-16746) Reduce number of index lookups for same table in IndexWhereTaskDispatcher
Date Wed, 24 May 2017 22:36:04 GMT

     [ https://issues.apache.org/jira/browse/HIVE-16746?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rajesh Balamohan updated HIVE-16746:
------------------------------------
       Resolution: Fixed
     Hadoop Flags: Reviewed
    Fix Version/s: 3.0.0
           Status: Resolved  (was: Patch Available)

Thanks for the review [~ashutoshc]. Committed to master.

> Reduce number of index lookups for same table in IndexWhereTaskDispatcher
> -------------------------------------------------------------------------
>
>                 Key: HIVE-16746
>                 URL: https://issues.apache.org/jira/browse/HIVE-16746
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Rajesh Balamohan
>            Assignee: Rajesh Balamohan
>            Priority: Minor
>             Fix For: 3.0.0
>
>         Attachments: HIVE-16746.1.patch
>
>
> {{IndexWhereTaskDispatcher}} is used when {{hive.optimize.index.filter=true}}. It lists
all indices for the table and depending on the query complexity, this ends up being in the
hotpath. For e.g, Q14 explain plan takes 180-200 seconds and this index querying multiple
times for same tables take up 30-40 seconds. This function was invoked around 24000 times
for same set of tables.



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