confusing behavior when passing --alias

[edublancas]

when running %sql CONNECTION_STRING --alias ALIAS, a new connection is not created if there's an active connection with duckdb connection string, but this should not be the case, a new connection should be created:

In [1]: %load_ext sql

In [2]: %sql --connections
Out[2]:
Active connections:
+---------+-----+-------+
| current | url | alias |
+---------+-----+-------+
+---------+-----+-------+

In [3]: %sql duckdb://

In [4]: %sql --connections
Out[4]:
Active connections:
+---------+-----------+-------+
| current |    url    | alias |
+---------+-----------+-------+
|    *    | duckdb:// |       |
+---------+-----------+-------+

In [5]: %sql duckdb:// --alias newconnection

In [6]: %sql --connections
Out[6]:
Active connections:
+---------+-----------+-------+
| current |    url    | alias |
+---------+-----------+-------+
|    *    | duckdb:// |       |
+---------+-----------+-------+