# SUPPORTED_BACKENDS


Database backends the pool can connect to.


`SUPPORTED_BACKENDS: Final[tuple[str, …]] = (``"postgresql", `<span class="st">`"mysql"``, ``"sqlite"``)`</span>


Each backend name must match a registered driver in the driver registry. Adding a new backend requires implementing the `Driver` protocol and registering it before pool initialization.


## Examples

Check whether a backend is available before connecting:

``` python
if "postgresql" in SUPPORTED_BACKENDS:
    conn = get_connection("postgresql")
```


## See Also

[get_connection()](get_connection.md#gdtest_complete_docstrings.get_connection)  

[BackendName](BackendName.md#gdtest_complete_docstrings.BackendName)