Andrey Gubichev created SPARK-45381:
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Summary: 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
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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