### Issue description
Tell us what should happen and what happens instead

### Example code
```go
If possible, please enter some example code here to reproduce the issue.
```

### Error log
```
If you have an error log, please paste it here.
```

### Configuration
*Driver version (or git SHA):*

*Go version:* run `go version` in your console

*Server version:* E.g. MySQL 5.6, MariaDB 10.0.20

*Server OS:* E.g. Debian 8.1 (Jessie), Windows 10