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)
      Literal Float64_2.42
    Function round (children 1)
     ExpressionList (children 2)
      Function pow (children 1)
       ExpressionList (children 2)
        Identifier x
        Identifier y
      Literal UInt64_6
