SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Function minus (children 1)
     ExpressionList (children 2)
      Function tupleElement (children 1)
       ExpressionList (children 2)
        Identifier a
        Literal UInt64_1
      Literal UInt64_1
    Function plus (children 1)
     ExpressionList (children 2)
      Function tupleElement (children 1)
       ExpressionList (children 2)
        Identifier a
        Literal UInt64_1
      Literal UInt64_1
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Literal Tuple_(UInt64_1, UInt64_2) (alias a)