Hacker News Reader

You can trigger external actions by connecting PostgreSQL pubsub (LISTEN/NOTIFY) with an external job queue. https://postgrest.com/en/v0.4/intro.html#external-notificati...

A NOTIFY SQL command can be sent out from either a stored procedure or a table trigger. (The docs could use some examples of this, but that's the idea.)

View on HN

Be aware that Postgres' NOTIFY is not stored/queued in any way. If your external client is not listening, it will get lost.

I would instead have the trigger insert a row into a "pending tasks" table - and then send a NOTIFY.

http://debezium.io/ is a better way to do this.

It uses the logical decoding feature to get all row changes and writes them to a Kafka queue.

This means it can pick up where it left when it crashes.

along the same lines https://github.com/confluentinc/bottledwater-pg

Reply on news.ycombinator.com