[jira] [Created] (DRILL-7108) Statistics adds two exchange operators

["Robert Hou (JIRA)" <ji...@apache.org>]

Robert Hou created DRILL-7108:
---------------------------------

             Summary: Statistics adds two exchange operators
                 Key: DRILL-7108
                 URL: https://issues.apache.org/jira/browse/DRILL-7108
             Project: Apache Drill
          Issue Type: Bug
          Components: Query Planning & Optimization
    Affects Versions: 1.16.0
            Reporter: Robert Hou
            Assignee: Gautam Parai
             Fix For: 1.16.0


TPCH 16 with sf 100 runs 14% slower.  Here is the query:
{noformat}
select
  p.p_brand,
  p.p_type,
  p.p_size,
  count(distinct ps.ps_suppkey) as supplier_cnt
from
  partsupp ps,
  part p
where
  p.p_partkey = ps.ps_partkey
  and p.p_brand <> 'Brand#21'
  and p.p_type not like 'MEDIUM PLATED%'
  and p.p_size in (38, 2, 8, 31, 44, 5, 14, 24)
  and ps.ps_suppkey not in (
    select
      s.s_suppkey
    from
      supplier s
    where
      s.s_comment like '%Customer%Complaints%'
  )
group by
  p.p_brand,
  p.p_type,
  p.p_size
order by
  supplier_cnt desc,
  p.p_brand,
  p.p_type,
  p.p_size;
{noformat}



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