SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function JSONExtract (children 1)
     ExpressionList (children 2)
      Literal \'{"a": ["hello", 100.0], "b": ["world", 200]}\'
      Literal \'Map(String, Tuple(String, Float64))\'