[Bug] min function not work well.

[gj-zhang]

Search before asking

• I had searched in the issues and found no similar issues.

Version

0.15.0 trunk-a1d1bd8
merge the code #8822 #8841

What's Wrong?

return the wrong result

What You Expected?

return the correct result.

How to Reproduce?

create table test_window_func
(
    id string,
    grade string,
    class string,
    math_score int,
    english_score int
) ENGINE=OLAP
UNIQUE KEY(`id`)
COMMENT "OLAP"
DISTRIBUTED BY HASH(`id`) BUCKETS 4
PROPERTIES (
"replication_allocation" = "tag.location.default: 3",
"in_memory" = "false",
"storage_format" = "V2"
);

insert into test_window_func
values
('1', '一年级', '一班', null, 7),
       ('2', null, '一班', 8, 7),
       ('3', '一年级', '二班', 9, 9),
       ('4', '一年级', '一班', 10, 1),
       ('5', '一年级', '一班', 5, 3);

sql:
select grade, min(math_score) from test_window_func group by grade order by grade;
+-----------+-------------------+
| grade     | min(`math_score`) |
+-----------+-------------------+
| NULL      |                 8 |
| 一年级    |                 5 |
+-----------+-------------------+
the result is correct.

then insert one row.
insert into test_window_func values ('6', null, '三班', null, null);

then delete one row that id = '2';
delete from test_window_func where id = '2';

query again

select grade, min(math_score) from test_window_func group by grade order by grade;
+-----------+-------------------+
| grade     | min(`math_score`) |
+-----------+-------------------+
| NULL      |        2147483647 |
| 一年级    |                 5 |
+-----------+-------------------+

the min result is Int.MAX

Anything Else?

min window function has same error.

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[cambyzju]

hi,

as mentioned on wechat, please only merge #8822 and try it again.

[gj-zhang]

resolved. thank you