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 toDecimal32 (alias y) (children 1)
     ExpressionList (children 2)
      Literal \'2.42\'
      Literal UInt64_2
    Function round (children 1)
     ExpressionList (children 2)
      Function min2 (children 1)
       ExpressionList (children 2)
        Identifier x
        Identifier y
      Literal UInt64_6
