relay/migrations/2020-03-16-160336_add_triggers/up.sql

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-- Your SQL goes here
CREATE OR REPLACE FUNCTION invoke_listeners_trigger ()
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
DECLARE
rec RECORD;
channel TEXT;
payload TEXT;
BEGIN
case TG_OP
WHEN 'INSERT' THEN
rec := NEW;
channel := 'new_listeners';
payload := NEW.actor_id;
WHEN 'DELETE' THEN
rec := OLD;
channel := 'rm_listeners';
payload := OLD.actor_id;
ELSE
RAISE EXCEPTION 'Unknown TG_OP: "%". Should not occur!', TG_OP;
END CASE;
PERFORM pg_notify(channel, payload::TEXT);
RETURN rec;
END;
$$;
CREATE OR REPLACE FUNCTION invoke_blocks_trigger ()
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
DECLARE
rec RECORD;
channel TEXT;
payload TEXT;
BEGIN
case TG_OP
WHEN 'INSERT' THEN
rec := NEW;
channel := 'new_blocks';
payload := NEW.domain_name;
WHEN 'DELETE' THEN
rec := OLD;
channel := 'rm_blocks';
payload := OLD.domain_name;
ELSE
RAISE EXCEPTION 'Unknown TG_OP: "%". Should not occur!', TG_OP;
END CASE;
PERFORM pg_notify(channel, payload::TEXT);
RETURN NULL;
END;
$$;
CREATE OR REPLACE FUNCTION invoke_whitelists_trigger ()
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
DECLARE
rec RECORD;
channel TEXT;
payload TEXT;
BEGIN
case TG_OP
WHEN 'INSERT' THEN
rec := NEW;
channel := 'new_whitelists';
payload := NEW.domain_name;
WHEN 'DELETE' THEN
rec := OLD;
channel := 'rm_whitelists';
payload := OLD.domain_name;
ELSE
RAISE EXCEPTION 'Unknown TG_OP: "%". Should not occur!', TG_OP;
END CASE;
PERFORM pg_notify(channel, payload::TEXT);
RETURN rec;
END;
$$;
CREATE TRIGGER listeners_notify
AFTER INSERT OR UPDATE OR DELETE
ON listeners
FOR EACH ROW
EXECUTE PROCEDURE invoke_listeners_trigger();
CREATE TRIGGER blocks_notify
AFTER INSERT OR UPDATE OR DELETE
ON blocks
FOR EACH ROW
EXECUTE PROCEDURE invoke_blocks_trigger();
CREATE TRIGGER whitelists_notify
AFTER INSERT OR UPDATE OR DELETE
ON whitelists
FOR EACH ROW
EXECUTE PROCEDURE invoke_whitelists_trigger();