Does postgres backed pub/sub also provide this type of event driven data sync? I thought postgres itself has emitter type functionality so the graphql code layer would then need to use sockets for communication?
The Pub/Sub that is available in PostgreSQL would also work but you might create an extra load on the db server by making it responsible for doing regular data manipulation stuff + pub/sub.
In general you're right and in order to start using PostgreSQL as a pub/sub engine one need to implement Apollo's PubSubEngine interface. Here is, for instance, Redis subscription implementation: github.com/davidyaha/graphql-redis...
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Does postgres backed pub/sub also provide this type of event driven data sync? I thought postgres itself has emitter type functionality so the graphql code layer would then need to use sockets for communication?
The Pub/Sub that is available in PostgreSQL would also work but you might create an extra load on the db server by making it responsible for doing regular data manipulation stuff + pub/sub.
In general you're right and in order to start using PostgreSQL as a pub/sub engine one need to implement Apollo's
PubSubEngineinterface. Here is, for instance, Redis subscription implementation: github.com/davidyaha/graphql-redis...