从外部表中选择时出现 sqlplus 错误:ORA-29913:执行 ODCIEXTTABLEOPEN 标注时出错

The following is based on Oracle's External Tables Concepts. The database we're using is 11g.

这是外部表定义:

drop table emp_load;

CREATE TABLE emp_load
    (employee_number      CHAR(5),
     employee_dob         DATE,
     employee_last_name   CHAR(20),
     employee_first_name  CHAR(15),
     employee_middle_name CHAR(15),
     employee_hire_date   DATE)
  ORGANIZATION EXTERNAL
    (TYPE ORACLE_LOADER
     DEFAULT DIRECTORY defaultdir
     ACCESS PARAMETERS
       (RECORDS DELIMITED BY NEWLINE
        FIELDS (employee_number      CHAR(2),
                employee_dob         CHAR(20),
                employee_last_name   CHAR(18),
                employee_first_name  CHAR(11),
                employee_middle_name CHAR(11),
                employee_hire_date   CHAR(10) date_format DATE mask "mm/dd/yyyy"
               )
       )
     LOCATION ('external_table_test.dat')
);

这是external_table_test.dat"的内容:

56november, 15, 1980  baker             mary       alice      09/01/2004
87december, 20, 1970  roper             lisa       marie      01/01/1999

SQL> select * from emp_load;
select * from emp_load
              *
ERROR at line 1:
ORA-29913: error in executing ODCIEXTTABLEOPEN callout
ORA-29400: data cartridge error
error opening file /defaultdir/EMP_LOAD_29305.log

CREATE TABLE emp_load
    (employee_number      CHAR(3),
     employee_last_name   CHAR(20),
     employee_middle_name CHAR(15),
     employee_first_name  CHAR(15)
     )
  ORGANIZATION EXTERNAL
    (TYPE ORACLE_LOADER
     DEFAULT DIRECTORY defaultdir
     ACCESS PARAMETERS
       (RECORDS DELIMITED BY NEWLINE
        BADFILE DHHSMAPSIS:'EMP.BAD'
        LOGFILE DHHSMAPSIS:'EMP.LOG'
        FIELDS TERMINATED BY ','
       )
    LOCATION ('external_table_test2.dat')
)
REJECT LIMIT UNLIMITED;

056,baker,beth,mary
057,smith,teddy,john