SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Function materialize (alias x) (children 1)
     ExpressionList (children 1)
      Function toDecimal32 (children 1)
       ExpressionList (children 2)
        Literal \'42.4242\'
        Literal UInt64_4
    Function materialize (alias y) (children 1)
     ExpressionList (children 1)
      Function toDecimal32 (children 1)
       ExpressionList (children 2)
        Literal \'2.42\'
        Literal UInt64_2
    Function round (children 1)
     ExpressionList (children 2)
      Function pow (children 1)
       ExpressionList (children 2)
        Identifier x
        Identifier y
      Literal UInt64_6
