Drop all PostgreSQL tables by one query

drop-tables.sql

DO $$
DECLARE 
    r record;
BEGIN
    FOR r IN SELECT quote_ident(tablename) AS tablename, quote_ident(schemaname) AS schemaname FROM pg_tables WHERE schemaname = 'public'
    LOOP
        RAISE INFO 'Dropping table %.%', r.schemaname, r.tablename;
        EXECUTE format('DROP TABLE IF EXISTS %I.%I CASCADE', r.schemaname, r.tablename);
    END LOOP;
END$$;