38 lines
839 B
PL/PgSQL
38 lines
839 B
PL/PgSQL
-- Your SQL goes here
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CREATE OR REPLACE FUNCTION invoke_nodes_trigger ()
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RETURNS TRIGGER
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LANGUAGE plpgsql
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AS $$
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DECLARE
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rec RECORD;
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channel TEXT;
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payload TEXT;
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BEGIN
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case TG_OP
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WHEN 'INSERT' THEN
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rec := NEW;
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channel := 'new_nodes';
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payload := NEW.listener_id;
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WHEN 'UPDATE' THEN
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rec := NEW;
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channel := 'new_nodes';
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payload := NEW.listener_id;
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WHEN 'DELETE' THEN
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rec := OLD;
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channel := 'rm_nodes';
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payload := OLD.listener_id;
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ELSE
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RAISE EXCEPTION 'Unknown TG_OP: "%". Should not occur!', TG_OP;
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END CASE;
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PERFORM pg_notify(channel, payload::TEXT);
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RETURN rec;
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END;
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$$;
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CREATE TRIGGER nodes_notify
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AFTER INSERT OR UPDATE OR DELETE
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ON nodes
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FOR EACH ROW
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EXECUTE PROCEDURE invoke_nodes_trigger();
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