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Posted to issues@spark.apache.org by "Andrey Gubichev (Jira)" <ji...@apache.org> on 2023/09/29 16:05:00 UTC

[jira] [Updated] (SPARK-45381) Incorrect COUNT bug handling in scalar subqueries

     [ https://issues.apache.org/jira/browse/SPARK-45381?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrey Gubichev updated SPARK-45381:
------------------------------------
    Description: 
This query has incorrect results:
create temp view l (a, b)
as values
(1, 2.0),
(1, 2.0),
(2, 1.0),
(2, 1.0),
(3, 3.0),
(null, null),
(null, 5.0),
(6, null);

create temp view r (c, d)
as values
(2, 3.0),
(2, 3.0),
(3, 2.0),
(4, 1.0),
(null, null),
(null, 5.0),
(6, null);

select (
select sum(cnt)
from (select count ( * ) cnt from r where l.a = r.c)
) from l;
 
 
It returns 

– !query output
1
1
2
2
NULL
NULL
NULL
NULL

NULLs in the output should be zeros.
 

  was:
This query has incorrect results:
create temp view l (a, b)
as values
(1, 2.0),
(1, 2.0),
(2, 1.0),
(2, 1.0),
(3, 3.0),
(null, null),
(null, 5.0),
(6, null);

create temp view r (c, d)
as values
(2, 3.0),
(2, 3.0),
(3, 2.0),
(4, 1.0),
(null, null),
(null, 5.0),
(6, null);


select (
select sum(cnt)
from (select count(*) cnt from r where l.a = r.c)
) from l;
 
 
It returns 

-- !query output
1
1
2
2
NULL
NULL
NULL
NULL

NULLs in the output should be zeros.
 


> Incorrect COUNT bug handling in scalar subqueries
> -------------------------------------------------
>
>                 Key: SPARK-45381
>                 URL: https://issues.apache.org/jira/browse/SPARK-45381
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 3.5.0
>            Reporter: Andrey Gubichev
>            Priority: Major
>
> This query has incorrect results:
> create temp view l (a, b)
> as values
> (1, 2.0),
> (1, 2.0),
> (2, 1.0),
> (2, 1.0),
> (3, 3.0),
> (null, null),
> (null, 5.0),
> (6, null);
> create temp view r (c, d)
> as values
> (2, 3.0),
> (2, 3.0),
> (3, 2.0),
> (4, 1.0),
> (null, null),
> (null, 5.0),
> (6, null);
> select (
> select sum(cnt)
> from (select count ( * ) cnt from r where l.a = r.c)
> ) from l;
>  
>  
> It returns 
> – !query output
> 1
> 1
> 2
> 2
> NULL
> NULL
> NULL
> NULL
> NULLs in the output should be zeros.
>  



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