SQL>

metlink引用文档

ORA-06576 error during Drop User (文档 ID 1498610.1)

In this Document

APPLIES TO:

SYMPTOMS

Dropping a user schema results in below errors:

SQL> drop user GG_ADMIN;

DROP USER "GG_ADMIN"
Error at line 2
ORA-00604: error occurred at recursive SQL level 1
ORA-06576: not a valid function or procedure name
ORA-06512: at line 21 gg_admin cascade;

CAUSE

A DDL trigger is defined on the drop statement.
Next query will get you the definition of the DDL Triggers in the system.

SQL> connect / as sysdba

SQL> SELECT a.obj#, a.sys_evts, b.name FROM trigger$ a,obj$ b WHERE a.sys_evts > 0 AND a.obj#=b.obj# AND baseobject = 0;

  OBJ#       SYS_EVTS NAME
---------- ---------- ------------------------------
  81794             8 LOGON_DATE
  81795          8416 NO_VM_DDL
  81796           128 NO_VM_DROP_A
  13177          8192 AW_REN_TRG
  13179           128 AW_DROP_TRG
  11990        524256 LOGMNRGGC_TRIGGER
  13175          4096 AW_TRUNC_TRG
  71787             1 MGMT_STARTUP

Get an errorstack for ORA-06576 error:

SQL> alter system set events='6576 trace name errorstack level 3';

SQL> drop user 

When executing 'drop user gg_admin', the resultant trace file shows the failing statement is a call to wmsys.no_vm_drop_proc('USER', 'GG_ADMIN', '').

From errorstack trace file we could observe the following:

 if (s_event='CREATE') then
   execute immediate 'call wmsys.no_vm_create_proc(''' || sys.dictionary_obj_type || ''', ''' || 
      sys.dictionary_obj_name || ''', ''' || sys.dictionary_obj_owner || ''')' ;
 elsif (s_event='DROP') then
   execute immediate 'call wmsys.no_vm_drop_proc(''' || sys.dictionary_obj_type || ''', ''' || 
      sys.dictionary_obj_name || ''', ''' || sys.dictionary_obj_owner || ''')' ;

The triggers enabled for this were in this case NO_VM_DDL and NO_VM_DROP_A

SOLUTION

Check if there are any DROP BEFORE triggers enabled. Once you drop the trigger, it will allow you to drop the user.

Workaround would be:

SQL> ALTER TRIGGER NO_VM_DDL DISABLE;
SQL> ALTER TRIGGER NO_VM_DROP_A DISABLE;
SQL> drop user gg_admin;

REFERENCES