SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Identifier number
    Function sum (alias sum) (children 1)
     ExpressionList (children 1)
      Identifier number
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function values (children 1)
       ExpressionList (children 6)
        Literal \'number Nullable(Int8)\'
        Literal UInt64_1
        Literal UInt64_1
        Literal UInt64_2
        Literal UInt64_3
        Literal NULL