SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function JSONExtract (children 1)
     ExpressionList (children 4)
      Literal \'{"a": "hello", "b": [-100, 200.0, 300]}\'
      Literal \'b\'
      Literal UInt64_4
      Literal \'LowCardinality(Nullable(Int64))\'