text: -- Tags: no-fasttest
  
  create temporary table t engine Memory as select * from generateRandom(
  $$
      a Array(Int8),
      b UInt32,
      c Nullable(String),
      d Decimal32(4),
      e Nullable(Enum16('h' = 1, 'w' = 5 , 'o' = -200)),
      f Float64,
      g Tuple(Date, DateTime('Asia/Istanbul'), DateTime64(3, 'Asia/Istanbul'), UUID),
      h FixedString(2),
      i Array(Nullable(UUID))
  $$, 10, 5, 3) limit 2;
  
  select * apply toJSONString from t;
  
  set allow_experimental_map_type = 1;
  select toJSONString(map('1234', '5678'));
  