ambari-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Pallav Kulshreshtha (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMBARI-14559) Hive View Visual explain caches and doesn't account for settings changes
Date Wed, 06 Jan 2016 06:44:40 GMT
Pallav Kulshreshtha created AMBARI-14559:
--------------------------------------------

             Summary: Hive View Visual explain caches and doesn't account for settings changes
                 Key: AMBARI-14559
                 URL: https://issues.apache.org/jira/browse/AMBARI-14559
             Project: Ambari
          Issue Type: Bug
          Components: ambari-views
            Reporter: Pallav Kulshreshtha
            Assignee: Pallav Kulshreshtha
             Fix For: 2.4.0


A setting like hive.auto.convert.join 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}




--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message