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Posted to issues-all@impala.apache.org by "Peter Ebert (Jira)" <ji...@apache.org> on 2019/09/19 01:31:00 UTC
[jira] [Commented] (IMPALA-8956) Row count incorrect in summary
while query running
[ https://issues.apache.org/jira/browse/IMPALA-8956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16932972#comment-16932972 ]
Peter Ebert commented on IMPALA-8956:
-------------------------------------
May be duplicate of IMPALA-8026
> Row count incorrect in summary while query running
> --------------------------------------------------
>
> Key: IMPALA-8956
> URL: https://issues.apache.org/jira/browse/IMPALA-8956
> Project: IMPALA
> Issue Type: Bug
> Reporter: Peter Ebert
> Priority: Major
> Attachments: image-2019-09-18-20-48-39-069.png, image-2019-09-18-21-28-33-720.png
>
>
> For a query (below) the summary is incorrect on the row count for the nested loop join, however when the query is complete its corrected:
> select g.name, g.start, g.aa, sum(case when p.pn < 125.0 then 1 else 0 end) / cast(max(lf_count) as decimal(10,6)) as lf, sum(case when p.pn >= 125.0 then 1 else 0 end) / cast(max(hf_count) as decimal(10,6)) as hff from g join p on (g.sampleid = p.sample_id) cross join (select count(*) as lf_count from p where pn < 125.0) lff cross join (select count(*) as hf_count from p where pn >= 125.0) hf group by g.name, g.start, g.aa order by name desc
>
> !image-2019-09-18-20-48-39-069.png!
> compared to the finished query
> !image-2019-09-18-21-28-33-720.png!
>
>
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