oracle 11.2.0.3 expdp 时报错，ORA-39181: Only partial table data may be exported due to fine grain

$ expdp system/system full=y directory=EXPDPIMPDP2 dumpfile=20170819_%U.dmp parallel=4 job_name=expimpdp

输出日志有不少如下信息
ORA-39181: Only partial table data may be exported due to fine grain access control on “xx”.”yy”

在mos搜索后找到如下解决方案

SOLUTION
To avoid this:
Grant the privilege EXEMPT ACCESS POLICY to the exporting user
-or-
Disable the VPD policy.

参考：
ORA-39181:Only Partial Table Data Exported Due To Fine Grain Access Control (文档 ID 422480.1)