Конвертация PostgreSQL в CSV

psql -d <database>

DO $$
DECLARE
    r RECORD;
BEGIN
    FOR r IN (SELECT table_name FROM information_schema.tables WHERE table_schema = 'public') LOOP
        EXECUTE format('COPY %I TO %L WITH (FORMAT CSV, HEADER)', r.table_name, '/<path-to-csv>/' || r.table_name || '.csv');
    END LOOP;
END $$;