11.2.0.4数据库，远程使用expdp+dblink备份数据库报错

报错如下：

ORA-31679: Table data object "HIS"."AQULED_COM_SQL" has long columns, and longs can not be loaded/unloaded using a network link
ORA-31679: Table data object "HIS"."COM_EBIS_UPDATE_LOG" has long columns, and longs can not be loaded/unloaded using a network link
ORA-31679: Table data object "HIS"."COM_SQL" has long columns, and longs can not be loaded/unloaded using a network link
. . exported "SYJJHIS"."PHA_COM_STORAGE"                 897.5 KB    5374 rows
ORA-31679: Table data object "HIS"."CHK_COM_SQL" has long columns, and longs can not be loaded/unloaded using a network link
ORA-31679: Table data object "HIS"."COM_SQL_PPC" has long columns, and longs can not be loaded/unloaded using a network link
ORA-31679: Table data object "HIS"."DCP_COM_SQL" has long columns, and longs can not be loaded/unloaded using a network link

2、官方文档

DataPump Import Of Tables Containing LONG Columns Using NETWORK_LINK Raises The Error ORA-31679 (文档 ID 1470331.1)

3、解决方法

1）expdp导出到本地，然后scp传输，然后再impdp导入

2）直接exp导出

这里由于数据文件才几十个G,直接只用了exp导出。但是已经到11g的版本还是建议大家使用expdp来备份数据。