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) not null );
INSERT INTO t1 VALUES (1);
SELECT c0 FROM t1 WHERE ((CASE (t1.c0 IS NULL) WHEN true THEN 0.1 ELSE 1 END )) LIKE 1; -- actual:{}, expected:{1}
```
### 2. What did you expect to see? (Required)
The SELECT statement should return the value 1.
### 3. What did you see instead (Required)
The SELECT statement returns nothing.
### 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