Is this Hasura GraphQL Engine open source? What's the business model? Are there any features missing if you don't pay anything?
How does it get notified by PostgreSQL when the result of a query changes, since AFAIK PostgreSQL has no such built-in functionality? (it works if other apps change the database, right?)
How does it get notified by PostgreSQL when the result of a query changes, since AFAIK PostgreSQL has no such built-in functionality? (it works if other apps change the database, right?)