SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function intervalLengthSum (children 1)
     ExpressionList (children 2)
      Identifier x
      Identifier y
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function values (children 1)
       ExpressionList (children 5)
        Literal \'x Int64, y Int64\'
        Literal Tuple_(UInt64_0, UInt64_10)
        Literal Tuple_(UInt64_5, UInt64_5)
        Literal Tuple_(UInt64_5, UInt64_6)
        Literal Tuple_(UInt64_1, Int64_-1)