Re: DBA_TAB_MODIFICATIONS not updated

You were true Stefan

I's fully the bug you quoted

SQL> select count(1) from DBA_TAB_MODIFICATIONS;

  COUNT(1)

      414

SQL> select * from  DBA_TAB_MODIFICATIONS;

no rows selected

I've tested changing the predicate order (underlined in yellow) as said in the here under MOC Kb and it works...

SQL> select u.name, o.name, null, null,

  2 m.inserts, m.updates, m.deletes, m.timestamp,

  3 decode(bitand(m.flags,1),1,'YES','NO'),

  4 m.drop_segments

  5  from sys.mon_mods_all$ m, sys.obj$ o, sys.tab$ t, sys.user$ u

  6 where o.obj# = m.obj# and o.obj# = t.obj# and o.owner# = u.user#

  7 union all

  8 select u.name, o.name, o.subname, null,

  9 m.inserts, m.updates, m.deletes, m.timestamp,

10 decode(bitand(m.flags,1),1,'YES','NO'),

11 m.drop_segments

12  from sys.mon_mods_all$ m, sys.obj$ o, sys.user$ u

13 where o.owner# = u.user# and o.obj# = m.obj# and o.type#=19

14 union all

15 select u.name, o.name, o2.subname, o.subname,

16 m.inserts, m.updates, m.deletes, m.timestamp,

17 decode(bitand(m.flags,1),1,'YES','NO'),

18 m.drop_segments

19  from sys.mon_mods_all$ m, sys.obj$ o, sys.tabsubpart$ tsp, sys.obj$ o2,

20 sys.user$ u

21 where o.obj# = m.obj# and o.owner# = u.user# and o.obj# = tsp.obj# and o2.obj# = tsp.pobj#;

no rows selected

SQL> select u.name, o.name, null, null,

  2 m.inserts, m.updates, m.deletes, m.timestamp,

  3 decode(bitand(m.flags,1),1,'YES','NO'),

  4 m.drop_segments

  5  from sys.mon_mods_all$ m, sys.obj$ o, sys.tab$ t, sys.user$ u

  6 where o.obj# = m.obj# and o.obj# = t.obj# and o.owner# = u.user#

  7  union all

  8 select u.name, o.name, o.subname, null,

  9 m.inserts, m.updates, m.deletes, m.timestamp,

10 decode(bitand(m.flags,1),1,'YES','NO'),

11 m.drop_segments

12  from sys.mon_mods_all$ m, sys.obj$ o, sys.user$ u

13 where o.obj# = m.obj# and o.owner# = u.user# and o.type#=19

14  union all

15 select u.name, o.name, o2.subname, o.subname,

16 m.inserts, m.updates, m.deletes, m.timestamp,

17 decode(bitand(m.flags,1),1,'YES','NO'),

18 m.drop_segments

19  from sys.mon_mods_all$ m, sys.obj$ o, sys.tabsubpart$ tsp, sys.obj$ o2,

20 sys.user$ u

21 where o.obj# = m.obj# and o.obj# = tsp.obj# and o2.obj# = tsp.pobj# and o.owner# = u.user#;

414 rows selected.

So I will set the parameter "_optimizer_join_factorization"=false to fix this issue.

Thanks a lot for your help !

Best regards

13984324  wrong result with UNION ALL of similar queries / in DBA_TAB_MODIFICATIONS

Affects:

Fixed:

Wrong result are possible with :

1) at least 3 branches in UNION ALL

2) at least 2 join factorization predicates

3) Predicate order in branches is different

4) Correct result with "_optimizer_join_factorization"=false;