[Bug] [Vectorized] Full join get error result

[HappenLee]

Search before asking

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

Version

master

What's Wrong?

CREATE TABLE nt1 (x String);
INSERT INTO nt1 (x) VALUES (NULL);
SELECT 'n fj n', t1.x, t2.x FROM nt1 AS t1 FULL JOIN nt1 AS t2 ON t1.x = t2.x ORDER BY t1.x;

result:

+----------+------+------+
| 'n fj n' | x    | x    |
+----------+------+------+
| n fj n   | NULL | NULL |

What You Expected?

right result:

+----------+------+------+
| 'n fj n' | x    | x    |
+----------+------+------+
| n fj n   | NULL | NULL |
| n fj n   | NULL | NULL |
+----------+------+------+

How to Reproduce?

No response

Anything Else?

No response

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