crazyleeyang opened a new issue #5971:
URL: https://github.com/apache/incubator-doris/issues/5971
**Describe the bug**
left join时出现非预期结果
**To Reproduce**
**doris表1:sku_doris1**
```sql
CREATE TABLE sku_doris1
(
sku_id int(11) NOT NULL
) ENGINE=OLAP
DISTRIBUTED BY HASH(sku_id) BUCKETS 1
PROPERTIES(
"storage_type" = "COLUMN",
"replication_num" = "1"
);
```
**sku_doris1表插入数据**
```sql
insert into sku_doris1 (sku_id) values (100),(101),(102),(103);
```
**doris表1:sku_doris2**
```sql
CREATE TABLE sku_doris2
(
sku_id int(11) NOT NULL
) ENGINE=OLAP
DISTRIBUTED BY HASH(sku_id) BUCKETS 1
PROPERTIES(
"storage_type" = "COLUMN",
"replication_num" = "1"
);
```
**sku_doris2表插入数据**
```sql
insert into sku_doris2 (sku_id) values (10000),(10001),(10002),(10003);
```
查询语句
```sql
select a.sku_id, c.price from sku_doris1 a left join
(select sku_id, 999 as price from sku_doris2 b)c
on a.sku_id=c.sku_id;
```
**期待的结果为**
| sku_id | price |
| ---- | ---- |
| 100 | NULL |
| 101 | NULL |
| 102 | NULL |
| 103 | NULL |
**期待的结果为**
| sku_id | price |
| ---- | ---- |
| 100 | 999 |
| 101 | 999 |
| 102 | 999 |
| 103 | 999 |
**环境信息**
* 版本:Doris version 0.12.21-release
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