SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function CAST (alias map) (children 1)
     ExpressionList (children 2)
      Function tuple (children 1)
       ExpressionList (children 2)
        Literal Array_[\'1\', \'2\', \'3\']
        Literal Array_[\'Ready\', \'Steady\', \'Go\']
      Literal \'Map(UInt8, String)\'
