[Feature Request]: Supports more functions

### Is there an existing issue for the same feature request?

- [X] I have checked the existing issues.

### Is your feature request related to a problem?

_No response_

### Describe the feature you'd like

### Math
- [x] sqrt #2081
- [x] round #2081
- [x] ceiling #2081
- [x] log #2081
- [x] truncate
- [x] isnan #2104
- [x] isinf #2104
- [x] isfinite #2104

### Varchar
- [x] char_length / character_length #2040
- [x] md5 #2061
- [x] regex #2059
- [x] lower
- [x] upper
- [x] ltrim #2067
- [x] rtrim #2067
- [x] trim #2067
- [x] substring #2061
- [x] position #2080
- [x] reverse
- [ ] strlen
- [ ] strip
- [ ] find
### Date and time

- [ ] year
- [ ] month
- [ ] day
- [ ] hour
- [ ] minute
- [ ] second
- [ ] year
- [ ] date_part
- [ ] current_date
- [ ] current_time
- [ ] current_timestamp
- [ ] century
- [ ] dayofmonth
- [ ] dayofweek
- [ ] dayofyear
- [ ] epoch
- [ ] era
- [ ] quarter
- [ ] weekday
- [ ] weekofyear

### Utility
- [ ] md5
- [ ] version