Oracle 11g needs group by - why?

Question

Hi folks,
I thought migrating a 10.2 DB to 11g would face no problems, but on a 11g db the following code will produce a ora-00979 error ( which was functional under 10.2
  UPDATE OBJEKT o SET
       (  o.herstellungskosten
        , o.angemess_valutierungsstand
       ) =
       ( SELECT  c.o_herstellungskosten
                   ,  b.o_angemess_valutierung
         FROM  obj_gewerk_calc_vw b
                 , read_obj_herstkosten_all_vw c
         WHERE b.o_obj_id = o.obj_id
          AND  b.o_obj_id = c.o_obj_id (+)
       WHERE o.obj_id  BETWEEN obj_von AND obj_bis
       ;the inline-query ( the internally iterating, surrounding update statement gives all obj_ids into the select, therfore the where-clause is for testing modified from c.o_obj_id = o.obj_id to c.o_obj_id > 0, and for better explanation the obj_id is additionally selected ) as:
SELECT  b.o_obj_id
           , c.o_herstellungskosten
           , b.o_angemess_valutierung
FROM  obj_gewerk_calc_vw b
        , read_obj_herstkosten_all_vw c
WHERE c.o_obj_id > 0
   AND  b.o_obj_id = c.o_obj_id (+) the result is:
O_OBJ_ID, O_HERSTELLUNGSKOSTEN , O_ANGEMESS_VALUTIERUNG
1, -1561871,85 , 403600
201, -573162,43 , 811214,9
222, 0 , 1888680
242, -1583060,05 , 2759600
285, -10000 , 0
Environmental information:
Windows7 64bit Workstation, oracle 11g 64bit Enterprise server running on that WS, using Quest Toad for testing and debugging
since this update statement definitely works under 10g, I wonder if it is a bug under 11g.
Could anybody help ?
thanks in advance,
Wilko

Answer 1

True :-) I too have been a "victim".
It would help if unintentional duplicate posts were edited to change the topic to "Ignore - Unintentional duplicate post due to network/software glitch" (or words to that effect), provide a link to the active post being responded to, and mark the duplicate post as answered. Maybe it is just too much to ask ? ;-)
Srini