An incorrect query result

[sayJason]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

CREATE TABLE t1 (c0 decimal(10,0));
INSERT INTO t1 VALUES (0);
SELECT c0 FROM t1 WHERE CAST(ATAN2(((t1.c0) IS NULL), (- (''))) AS TIME); -- actual: {}, expected: {0}

2. What did you expect to see? (Required)

The SELECT statement should return the value 0.

3. What did you see instead (Required)

The SELECT statement returns an empty set.

4. What is your TiDB version? (Required)

Release Version: v6.6.0
Edition: Community
Git Commit Hash: f4ca082
Git Branch: heads/refs/tags/v6.6.0
UTC Build Time: 2023-02-17 14:49:02
GoVersion: go1.19.5
Race Enabled: false
TiKV Min Version: 6.2.0-alpha
Check Table Before Drop: false
Store: tikv

[seiya-annie]

tried in mysql:

mysql> CREATE TABLE t1 (c0 decimal(10,0));
Query OK, 0 rows affected (0.01 sec)

mysql> INSERT INTO t1 VALUES (0);
Query OK, 1 row affected (0.00 sec)

mysql> SELECT c0 FROM t1 WHERE CAST(ATAN2(((t1.c0) IS NULL), (- (''))) AS TIME); 
+------+
| c0   |
+------+
|    0 |
+------+
1 row in set (0.00 sec)