// Once we have electric, we then establish the data change
// notification subscription, comparing the tablenames used by the
// query with the changed tablenames in the data change notification
// to determine whether to re-query or not.
//
// If we do need to re-query, then we use the saved function to reuse the query
So it re-runs queries on all updates in tables from the query.
How do you decide what queries are relevant?