SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 1)
           Asterisk
          TablesInSelectQuery (children 2)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier l
           TablesInSelectQueryElement (children 2)
            TableExpression (children 1)
             TableIdentifier r
            TableJoin (children 1)
             Function equals (children 1)
              ExpressionList (children 2)
               Identifier l.luid
               Identifier r.ruid
   Function and (children 1)
    ExpressionList (children 2)
     Function isNull (children 1)
      ExpressionList (children 1)
       Identifier luid
     Function isNotNull (children 1)
      ExpressionList (children 1)
       Identifier ruid
