Enable Versioning issues ...

Question

Hi all,
I have a table, lets call it tab1. One of the column of tab1 table is XMLTYPE.. When i tried to version enable it, i received an error that indicated some problem with indexes/constraint. I checked list of tables and it seemed some of the supported tables were created by failed call to enableversioning e.g i could see tab1_LT. I also got errors when i tried to execute disableversioning. I then manually deleted some of the objects created by oracle to support versioning for tabl1 (including tab1_lt) table, dropped tab1, re-created it and again then tried to re-enable versioning but now i getting different error. Given below is the error msg:
SQL> exec dbms_wm.enableversioning('tab1');
BEGIN dbms_wm.enableversioning('tab1'); END;
ERROR at line 1:
ORA-20228: this operation is not allowed for table 'mydb.tab1'with version state 'DV'
ORA-06512: at "SYS.LTDDL", line 441
ORA-06512: at "SYS.LTDDL", line 1177
ORA-06512: at "SYS.LTDDL", line 1163
ORA-06512: at "SYS.LT", line 8033
ORA-06512: at line 1
I will appreciate if somebody could help me with this ..
- n

Answer 1

Hi,
Running disableversioning twice with last_error_msg=true solved the problem. Now i can enable versioning without any problem. But disable versioning succeed on second attempt. After first attempt, i get following error msg:
SQL> exec dbms_wm.disableversioning('tab1',ignore_last_error=>true);
BEGIN dbms_wm.disableversioning('tab1',ignore_last_error=>true); END;
ERROR at line 1:
ORA-20231: table 'tab1' failed during DisableVersioning. Error:
ORA-01403: no data found
ORA-01403: no data found
ORA-06512: at "SYS.LTDDL", line 831
ORA-06512: at "SYS.LTDDL", line 1663
ORA-06512: at "SYS.LTDDL", line 1648
ORA-06512: at "SYS.LT", line 8116
ORA-06512: at line 1
Given below are the formatted contents of all_wm_vt_erros table:
STATE
Declare
SQL_STR
     counter integer;
     func_num integer;
     sql_string varchar2(16000);
     Begin
     sql_string := 'select ref_count
          from WMSYS.WM$ADT_FUNC_TABLE
          where type_name = ''XMLTYPE''
          for update';
     sys.ltadm.ExecSQLIntoInt(sql_string, counter);
     if (counter = 0) then
          sql_string := 'select func_name
               from WMSYS.WM$ADT_FUNC_TABLE
               where type_name = ''XMLTYPE''';
     sys.ltadm.ExecSQLIntoInt(sql_string, func_num);
     sql_string := 'delete from WMSYS.WM$ADT_FUNC_TABLE
          where type_name = ''XMLTYPE''';
     execute immediate sql_string;
     sql_string := 'drop function OVMADT' || func_num;
     execute immediate sql_string;
     end if;
END;     
STATUS
DV STEP EXECUTED WITH ERRORS     
ERROR_MSG
ORA-01403: no data found
ORA-01403: no data found
One of the column type is XMLTYPE which allows null . may be above error is raised because one of row has null value for that column? I think it is safe to ignore above msg...
thanks
- n