Table alias fails with case sensitive column names

### Describe the bug

When aliasing a subquery with case sensitive column names, an error is returned.

### To Reproduce

```sql
> create table t ("A" int);

> select * from (select * from t) t_(x);
Schema error: No field named a. Valid fields are t."A", t."A".
```

### Expected behavior

Execute without error.

### Additional context

_No response_