ORA-00904: "WMSYS"."WM_CONCAT": 标识符无效

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@?\RDBMS\ADMIN\owmctab.plb
@?\RDBMS\ADMIN\owmaggrs.plb  
@?\RDBMS\ADMIN\owmaggrb.plb  

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SQL> list
  1* SELECT * FROM DBA_OBJECTS WHERE OBJECT_NAME LIKE 'WM_CONCAT%'
SQL> /

OWNER                OBJECT_NAME                    SUBOBJECT_NAME        OBJECT_ID DATA_OBJECT_ID OBJECT_TYPE         CREATED      LAST_DDL_TIM TIMESTAMP           STATUS  T G S  NAMESPACE EDITION_NAME
-------------------- ------------------------------ -------------------- ---------- -------------- ------------------- ------------ ------------ ------------------- ------- - - - ---------- ------------------------------
PUBLIC               WM_CONCAT