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https://issues.apache.org/jira/browse/DRILL-7108?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Hou closed DRILL-7108.
-----------------------------
> With statistics enabled TPCH 16 has two additional 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
> Priority: Major
> Labels: ready-to-commit
> 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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