graphql-postgres-subscriptions

GraphQL subscriptions implementation using PostgreSQL's LISTEN/NOTIFY and apollo's graphql-subscriptions. Stable version 1.0.5, not actively maintained (last release 2019). Supports multiple subscription manager instances by leveraging Postgres pub/sub mechanism. Implements PubSubEngine and AsyncIterator interfaces. Compared to graphql-redis-subscriptions, it uses no additional infrastructure beyond Postgres. Limited to single-node Postgres; does not support horizontal scaling natively. Peer dependency graphql supports ^0.10.5 to ^14.0.0. Node >=6 required.