@hive.apache.org"
Subject: Re: TPCDS query degrade with hive-3.1.2 because of wrong estimation
for reducers
Based on the plan, filtered output in map-1 had mis-estimates and also groupby
operators have large misestimates.
This is causing the number of reducers to be estimated as "4&qu
g"
> *Subject: *TPCDS query degrade with hive-3.1.2 because of wrong
> estimation for reducers
>
>
>
> Hi All,
>
>
>
> We’ve ran TPCDS queries against hive-3.1.2 and trunk(little older
> version). (Attached files suffix “a” is trunk and “v” is 3.1.2)
>
>
