SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function wkt (alias x) (children 1)
     ExpressionList (children 1)
      Function CAST (children 1)
       ExpressionList (children 2)
        Function array (children 1)
         ExpressionList (children 3)
          Literal Tuple_(UInt64_1, UInt64_1)
          Literal Tuple_(UInt64_2, UInt64_2)
          Literal Tuple_(UInt64_3, UInt64_3)
        Literal \'Array(Tuple(Float64, Float64))\'
   ExpressionList (children 4)
    Identifier x
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier x
    Function readWKTRing (alias y) (children 1)
     ExpressionList (children 1)
      Identifier x
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier y
