SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function sum (children 1)
     ExpressionList (children 1)
      Function multiIf (children 1)
       ExpressionList (children 3)
        Literal UInt64_1
        Identifier dummy
        Literal NULL
