Variable substitution for named connections

Can we get variable substitution (smth like 'test {test_var}'.format(test_var = 'qwe') at python) for named connections

For example, right now i need to create separate connections for every URL with same pattern.

I suggest something like this
```

http://myurl.com/{YYYYMMDD}/mydata.csv

```

And use like this for example
`select * from url(my_connection, YYYYMMDD = '20220101')`