An incorrect query result

## Bug Report

Please answer these questions before submitting your issue. Thanks!

### 1. Minimal reproduce step (Required)

```SQL
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: f4ca0821fb96a2bdd37d2fb97eb26c07fc58d4e4
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