SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Function toDecimal32 (alias x) (children 1)
     ExpressionList (children 2)
      Literal \'42.4242\'
      Literal UInt64_4
    Function toDecimal64 (alias y) (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
