expdp时ORA-00955: name is already used by an existing object

今天执行一条expdp语句时，报错如下：

ORA-31626: job does not exist

ORA-31633: unable to create master table "NEW.GWJOB"

ORA-06512: at "SYS.DBMS_SYS_ERROR", line 95

ORA-06512: at "SYS.KUPV$FT", line 1020

ORA-00955: name is already used by an existing object

因为我上次执行这个expdp命令的时候，在命令执行完之前手动kill了这个命令，导致oracle没有自动清除表gwjob。

如果正常执行，oracle会自动清除这个表。

这个表记录了执行这个命令的详细信息，表结构如下：

 Name                                      Null?    Type

 ----------------------------------------- -------- ----------------------------

 PROCESS_ORDER                                      NUMBER

 DUPLICATE                                          NUMBER

 DUMP_FILEID                                        NUMBER

 DUMP_POSITION                                      NUMBER

 DUMP_LENGTH                                        NUMBER

 DUMP_ORIG_LENGTH                                   NUMBER

 DUMP_ALLOCATION                                    NUMBER

 COMPLETED_ROWS                                     NUMBER

 ERROR_COUNT                                        NUMBER

 ELAPSED_TIME                                       NUMBER

 OBJECT_TYPE_PATH                                   VARCHAR2(200)

 OBJECT_PATH_SEQNO                                  NUMBER

 OBJECT_TYPE                                        VARCHAR2(30)

 IN_PROGRESS                                        CHAR(1)

 OBJECT_NAME                                        VARCHAR2(500)

 OBJECT_LONG_NAME                                   VARCHAR2(4000)

 OBJECT_SCHEMA                                      VARCHAR2(30)

 ORIGINAL_OBJECT_SCHEMA                             VARCHAR2(30)

 ORIGINAL_OBJECT_NAME                               VARCHAR2(4000)

 PARTITION_NAME                                     VARCHAR2(30)

 SUBPARTITION_NAME                                  VARCHAR2(30)

 DATAOBJ_NUM                                        NUMBER

 FLAGS                                              NUMBER

 PROPERTY                                           NUMBER

 TRIGFLAG                                           NUMBER

 CREATION_LEVEL                                     NUMBER

 COMPLETION_TIME                                    DATE

 OBJECT_TABLESPACE                                  VARCHAR2(30)

 SIZE_ESTIMATE                                      NUMBER

 OBJECT_ROW                                         NUMBER

 PROCESSING_STATE                                   CHAR(1)

 PROCESSING_STATUS                                  CHAR(1)

 BASE_PROCESS_ORDER                                 NUMBER

 BASE_OBJECT_TYPE                                   VARCHAR2(30)

 BASE_OBJECT_NAME                                   VARCHAR2(30)

 BASE_OBJECT_SCHEMA                                 VARCHAR2(30)

 ANCESTOR_PROCESS_ORDER                             NUMBER

 DOMAIN_PROCESS_ORDER                               NUMBER

 PARALLELIZATION                                    NUMBER

 UNLOAD_METHOD                                      NUMBER

 LOAD_METHOD                                        NUMBER

 GRANULES                                           NUMBER

 SCN                                                NUMBER

 GRANTOR                                            VARCHAR2(30)

 XML_CLOB                                           CLOB

 PARENT_PROCESS_ORDER                               NUMBER

 NAME                                               VARCHAR2(30)

 VALUE_T                                            VARCHAR2(4000)

 VALUE_N                                            NUMBER

 IS_DEFAULT                                         NUMBER

 FILE_TYPE                                          NUMBER

 USER_DIRECTORY                                     VARCHAR2(4000)

 USER_FILE_NAME                                     VARCHAR2(4000)

 FILE_NAME                                          VARCHAR2(4000)

 EXTEND_SIZE                                        NUMBER

 FILE_MAX_SIZE                                      NUMBER

 PROCESS_NAME                                       VARCHAR2(30)

 LAST_UPDATE                                        DATE

 WORK_ITEM                                          VARCHAR2(30)

 OBJECT_NUMBER                                      NUMBER

 COMPLETED_BYTES                                    NUMBER

 TOTAL_BYTES                                        NUMBER

 METADATA_IO                                        NUMBER

 DATA_IO                                            NUMBER

 CUMULATIVE_TIME                                    NUMBER

 PACKET_NUMBER                                      NUMBER

 INSTANCE_ID                                        NUMBER

 OLD_VALUE                                          VARCHAR2(4000)

 SEED                                               NUMBER

 LAST_FILE                                          NUMBER

 USER_NAME                                          VARCHAR2(30)

 OPERATION                                          VARCHAR2(30)

 JOB_MODE                                           VARCHAR2(30)

 QUEUE_TABNUM                                       NUMBER

 CONTROL_QUEUE                                      VARCHAR2(30)

 STATUS_QUEUE                                       VARCHAR2(30)

 REMOTE_LINK                                        VARCHAR2(4000)

 VERSION                                            NUMBER

 JOB_VERSION                                        VARCHAR2(30)

 DB_VERSION                                         VARCHAR2(30)

 TIMEZONE                                           VARCHAR2(64)

 STATE                                              VARCHAR2(30)

 PHASE                                              NUMBER

 GUID                                               RAW(16)

 START_TIME                                         DATE

 BLOCK_SIZE                                         NUMBER

 METADATA_BUFFER_SIZE                               NUMBER

 DATA_BUFFER_SIZE                                   NUMBER

 DEGREE                                             NUMBER

 PLATFORM                                           VARCHAR2(101)

 ABORT_STEP                                         NUMBER

 INSTANCE                                           VARCHAR2(60)

 CLUSTER_OK                                         NUMBER

 SERVICE_NAME                                       VARCHAR2(100)

 OBJECT_INT_OID                                     VARCHAR2(32)

当然，解决这个错误就很简单了，直接删除这个表就可以了。

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