一套11.1.0.7上的Oracle Application Object Library应用程序，在收集schema统计信息时出现了ORA-20001错误，具体错误日志如下:
SQL> exec fnd_stats.gather_schema_statistics('AP');
PL/SQL procedure successfully completed.
SQL> show error
No errors.
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Concurrent request error Log
------------------------------------
**Starts**14-APR-2011 02:20:53
**Ends**14-APR-2011 04:40:43
ORA-0000: normal, successful completion
+---------------------------------------------------------------------------+
Start of log messages from FND_FILE
+---------------------------------------------------------------------------+
In GATHER_SCHEMA_STATS , schema_name= ALL percent= 10 degree = 8 internal_flag= NOBACKUP
stats on table AQ$_WF_CONTROL_P is locked
stats on table FND_CP_GSM_IPC_AQTBL is locked
stats on table WF_NOTIFICATION_OUT is locked
Error #1: ERROR: While GATHER_TABLE_STATS:
object_name=AP.JE_FR_DAS_010***ORA-20001: invalid column name or
duplicate columns/column groups/expressions in method_opt***
Error #2: ERROR: While GATHER_TABLE_STATS:
object_name=AP.JE_FR_DAS_010_NEW***ORA-20001: invalid column name or
duplicate columns/column groups/expressions in method_opt***
Error #3: ERROR: While GATHER_TABLE_STATS:
object_name=AP.JG_ZZ_SYS_FORMATS_ALL_B***ORA-20001: invalid column name or
duplicate columns/column groups/expressions in method_opt***
+---------------------------------------------------------------------------+
End of log messages from FND_FILE
+---------------------------------------------------------------------------+
经确认该问题由bug 7601966: GATHER SCHEMA STATS ON AP SCHEMA FAILS WITH ORA-20001: INVALID COLUMN NAME 引起，可以通过follow文档<Gather Schema Statistics fails with Ora-20001 errors after 11G database upgrade [ID 781813.1]>解决该问题。
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