Problem dropping extended statistics

Question

I created some extended statistics on a table, but now I can't delete them. I want to delete the statistics/virtual column represented by SYS_STUDDJ802H#C$E$W27NW$#B7DO.
SQL> SELECT *
      2 FROM   dba_stat_extensions
      3 WHERE  table_name = 'T_E2_TRANS_INFO'
OWNER      TABLE_NAME           EXTENSION_NAME                 EXTENSION                                     CREATO DRO
INTERFACE  T_E2_TRANS_INFO      SYS_NC00063$                   (TRUNC("TRANSACTION_DATE"))                   SYSTEM NO
INTERFACE  T_E2_TRANS_INFO      SYS_STUDDJ802H#C$E$W27NW$#B7DO ("PARTITION_ID",TRUNC("TRANSACTION_DATE"))    USER   YES
SQL> exec dbms_stats.drop_extended_stats('INTERFACE','T_E2_TRANS_INFO','(partition_id, trunc(transaction_date))');
BEGIN dbms_stats.drop_extended_stats('INTERFACE','T_E2_TRANS_INFO','(partition_id, trunc(transaction_date))'); END;
ERROR at line 1:
ORA-20000: extension "(partition_id, trunc(transaction_date))" does not exist
ORA-06512: at "SYS.DBMS_STATS", line 8478
ORA-06512: at "SYS.DBMS_STATS", line 31747
ORA-06512: at line 1
SQL> exec dbms_stats.drop_extended_stats('INTERFACE','T_E2_TRANS_INFO','(PARTITION_ID, trunc(TRANSACTION_DATE))');
BEGIN dbms_stats.drop_extended_stats('INTERFACE','T_E2_TRANS_INFO','(PARTITION_ID, trunc(TRANSACTION_DATE))'); END;
ERROR at line 1:
ORA-20000: extension "(PARTITION_ID, trunc(TRANSACTION_DATE))" does not exist
ORA-06512: at "SYS.DBMS_STATS", line 8478
ORA-06512: at "SYS.DBMS_STATS", line 31747
ORA-06512: at line 1
SQL> exec dbms_stats.drop_extended_stats('INTERFACE','T_E2_TRANS_INFO','(PARTITION_ID, TRUNC(TRANSACTION_DATE))');
BEGIN dbms_stats.drop_extended_stats('INTERFACE','T_E2_TRANS_INFO','(PARTITION_ID, TRUNC(TRANSACTION_DATE))'); END;
ERROR at line 1:
ORA-20000: extension "(PARTITION_ID, TRUNC(TRANSACTION_DATE))" does not exist
ORA-06512: at "SYS.DBMS_STATS", line 8478
ORA-06512: at "SYS.DBMS_STATS", line 31747
ORA-06512: at line 1
SQL> exec dbms_stats.drop_extended_stats('INTERFACE','T_E2_TRANS_INFO','("PARTITION_ID", TRUNC("TRANSACTION_DATE"))');
BEGIN dbms_stats.drop_extended_stats('INTERFACE','T_E2_TRANS_INFO','("PARTITION_ID", TRUNC("TRANSACTION_DATE"))'); END;
ERROR at line 1:
ORA-20000: extension "("PARTITION_ID", TRUNC("TRANSACTION_DATE"))" does not exist
ORA-06512: at "SYS.DBMS_STATS", line 8478
ORA-06512: at "SYS.DBMS_STATS", line 31747
ORA-06512: at line 1Anybody run into this?
Thanks!

Answer 1

I tried to get such a situation with no luck. How did you get the ("PARTITION_ID",TRUNC("TRANSACTION_DATE"))?
I tried on a partition table but I never get a "PARTITION_ID" into the function.
drop table ex_stats_test purge;
create table ex_stats_test
(mnr number,
mvol number)
PARTITION BY range (mnr)
(PARTITION PARTITION_000000  VALUES LESS THAN (MAXVALUE));
insert into EX_STATS_TEST values (1,2);
commit;
SELECT DBMS_STATS.CREATE_EXTENDED_STATS('ANDY','EX_STATS_TEST','(TRUNC("MVOL"))') FROM DUAL;
select * from  dba_stat_extensions where owner='ANDY';
exec DBMS_STATS.DROP_EXTENDED_STATS ('ANDY','EX_STATS_TEST','(TRUNC("MVOL"))');