50 lines
1.5 KiB
PL/PgSQL
50 lines
1.5 KiB
PL/PgSQL
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-- Realtime schema
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CREATE SCHEMA IF NOT EXISTS madbase_realtime;
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-- Generic Trigger Function
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CREATE OR REPLACE FUNCTION madbase_realtime.broadcast_changes()
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RETURNS trigger AS $$
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DECLARE
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payload jsonb;
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topic text;
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BEGIN
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-- Construct payload
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payload = jsonb_build_object(
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'schema', TG_TABLE_SCHEMA,
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'table', TG_TABLE_NAME,
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'type', TG_OP,
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'timestamp', now()
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);
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IF (TG_OP = 'INSERT') THEN
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payload = payload || jsonb_build_object('record', row_to_json(NEW)::jsonb);
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ELSIF (TG_OP = 'UPDATE') THEN
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payload = payload || jsonb_build_object(
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'record', row_to_json(NEW)::jsonb,
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'old_record', row_to_json(OLD)::jsonb
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);
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ELSIF (TG_OP = 'DELETE') THEN
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payload = payload || jsonb_build_object('old_record', row_to_json(OLD)::jsonb);
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END IF;
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-- Send notification
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-- Payload limit is 8000 bytes. Larger payloads will fail or need truncation.
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-- For MVP, we assume it fits.
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PERFORM pg_notify('madbase_realtime', payload::text);
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RETURN NEW;
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END;
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$$ LANGUAGE plpgsql;
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-- Example: Enable for public.users (if it exists)
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-- DO $$
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-- BEGIN
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-- IF EXISTS (SELECT FROM pg_tables WHERE schemaname = 'public' AND tablename = 'users') THEN
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-- CREATE TRIGGER realtime_users_changes
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-- AFTER INSERT OR UPDATE OR DELETE ON public.users
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-- FOR EACH ROW EXECUTE FUNCTION madbase_realtime.broadcast_changes();
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-- END IF;
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-- END
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-- $$;
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