Alerts V2 (Public Preview) do not support query parameters yet. This is a documented limitation. Legacy alerts (V1) do support parameters and will use the default values defined in the SQL editor.

For notifications, both legacy alerts and Alerts V2 allow notifying users and notification destinations, so adding subscribers is supported in both.

If you’re using the Python SDK or REST APIs, parameterized alerts must still be created using the legacy (V1) APIs, since parameters are not available in V2 yet. There’s no published timeline for when parameter support will be added to V2.

Recommended workaround: continue using legacy alerts if parameters are required, or switch to Alerts V2 only if you can avoid parameters (for example, by using constants or reading values from a table/view).