[
https://issues.apache.org/jira/browse/HIVE-13602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15255976#comment-15255976
]
Nemon Lou commented on HIVE-13602:
----------------------------------
I just copy it from the result of "explain rewrite q16".
{noformat}
explain rewrite
select
p_brand,
p_type,
p_size,
count(distinct ps_suppkey) as supplier_cnt
from
partsupp,
part
where
p_partkey = ps_partkey
and p_brand <> 'Brand#34'
and p_type not like 'ECONOMY BRUSHED%'
and p_size in (22, 14, 27, 49, 21, 33, 35, 28)
and partsupp.ps_suppkey not in (
select
s_suppkey
from
supplier
where
s_comment like '%Customer%Complaints%'
)
group by
p_brand,
p_type,
p_size
order by
supplier_cnt desc,
p_brand,
p_type,
p_size;
{noformat}
> TPCH q16 return wrong result when CBO is on
> -------------------------------------------
>
> Key: HIVE-13602
> URL: https://issues.apache.org/jira/browse/HIVE-13602
> Project: Hive
> Issue Type: Bug
> Components: CBO, Logical Optimizer
> Affects Versions: 1.2.1
> Reporter: Nemon Lou
> Assignee: Pengcheng Xiong
> Attachments: calcite_cbo_bad.out, calcite_cbo_good.out,
> explain_cbo_bad_part1.out, explain_cbo_bad_part2.out,
> explain_cbo_bad_part3.out, explain_cbo_good(rewrite)_part1.out,
> explain_cbo_good(rewrite)_part2.out, explain_cbo_good(rewrite)_part3.out
>
>
> Running tpch with factor 2,
> q16 returns 1,160 rows when CBO is on,
> while returns 59,616 rows when CBO is off.
> See attachment for detail .
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
