Vineet Garg created HIVE-20265:
----------------------------------
Summary: PTF operator has an extra reducer in CBO
Key: HIVE-20265
URL: https://issues.apache.org/jira/browse/HIVE-20265
Project: Hive
Issue Type: Improvement
Components: Query Planning
Reporter: Vineet Garg
Assignee: Vineet Garg
{code:sql}
explain vectorization detail
select p_mfgr, p_name, p_size,
min(p_retailprice),
rank() over(distribute by p_mfgr sort by p_name)as r,
dense_rank() over(distribute by p_mfgr sort by p_name) as dr,
p_size, p_size - lag(p_size,1,p_size) over(distribute by p_mfgr sort by p_name)
as deltaSz
from part
group by p_mfgr, p_name, p_size
{code}
Above query generates extra reducer with CBO on.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
