SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Identifier x
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier final_bug
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier x
   Set
 Identifier Null