Inconsistent Errors using backticks

Currently, if you use backticks in the wrong place you get a different error code. For example:

Mysql-8
---
```
mysql> select ceil(`1.2`);
ERROR 1054 (42S22): Unknown column '1.2' in 'field list'
```

go-mysql-server
---
```
mysql> select ceil (`8.88`);
ERROR 1105 (HY000): unknown error: column "8.88" could not be found in any table in scope
```