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From "Pallav Kulshreshtha (JIRA)" <>
Subject [jira] [Updated] (AMBARI-14559) Hive View Visual explain caches and doesn't account for settings changes
Date Wed, 06 Jan 2016 08:00:49 GMT


Pallav Kulshreshtha updated AMBARI-14559:
    Attachment:     (was: AMBARI-14559_branch-2.2.patch)

> Hive View Visual explain caches and doesn't account for settings changes
> ------------------------------------------------------------------------
>                 Key: AMBARI-14559
>                 URL:
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-views
>            Reporter: Pallav Kulshreshtha
>            Assignee: Pallav Kulshreshtha
>             Fix For: 2.4.0
>         Attachments: Map Join.png, Shuffle Join.png
> A setting like will often radically change a Hive explain plan.
In particular the query below will be a map join or shuffle join depending on this setting
being true or false, respectively.
> What I see in the Hive View is that when I open visual explain, I get the correct explain
plan based on the setting at that time. If I go and change the setting, then go back to the
visual explain, the explain is not updated. If I reload the tab, the correct explain plan
will show up when I go back to the explain view.
> See attached shots.
> Query I use is this:
> {code}
> select time_by_day.the_year as c0, time_by_day.quarter as c1,
> count(sales_fact_1997.product_id) as m0,
> sum(sales_fact_1997.unit_sales) as m1,
> sum(sales_fact_1997.store_sales) as m2,
> sum(sales_fact_1997.store_cost) as m3,
> count(distinct sales_fact_1997.customer_id) as m4
> from time_by_day as time_by_day,
> sales_fact_1997 as sales_fact_1997 where
> sales_fact_1997.time_id = time_by_day.time_id and
> time_by_day.the_year = 1997 group by time_by_day.the_year,
> time_by_day.quarter ;
> {code}

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