Useful cheatsheet for Postgres
If you want to perform pubsub on table modifications then the table must trigger the
Triggers cannot be generated for every table, you have to create them for each table. However... you can use this to generate a list of commands to run for every table. This WON'T run the commands, it will just generate a list of SQL strings that you can copy/paste into the migration file.
NOTE: this doesn't include DELETE triggers.
select 'CREATE TRIGGER notify_' || table_name || '_trigger' || ' AFTER INSERT OR UPDATE ON ' || table_name || ' FOR EACH ROW EXECUTE PROCEDURE broadcast_changes();' AS trigger_creation_query FROM ( SELECT table_name FROM information_schema.tables WHERE table_schema = 'public' and table_type = 'BASE TABLE' and table_name <> 'schema_migrations' ) tablelist;