SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 4)
    Identifier fact_1_id
    Identifier fact_2_id
    Identifier fact_3_id
    Function SUM (alias sales_value) (children 1)
     ExpressionList (children 1)
      Identifier sales_value
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier grouping_sets
   ExpressionList (children 3)
    ExpressionList (children 2)
     Identifier fact_1_id
     Identifier fact_2_id
    ExpressionList (children 1)
     Identifier fact_3_id
    ExpressionList
   ExpressionList (children 3)
    OrderByElement (children 1)
     Identifier fact_1_id
    OrderByElement (children 1)
     Identifier fact_2_id
    OrderByElement (children 1)
     Identifier fact_3_id