expdp在导数据库时，发现存在以下异常
而且日志显示不完全，如下：
;;;
Export: Release 11.2.0.1.0 - Production on
Thu Jan 13 12:27:49 2022
Copyright (c) 1982, 2009, Oracle and/or itsaffiliates. All rights reserved.
;;;
Connected to: Oracle Database 11g
Enterprise Edition Release 11.2.0.1.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options
Starting "SYS"."SYS_EXPORT_FULL_01":
"/******** AS SYSDBA" directory=expdp1 dumpfile=exp01.dmp logfile=exp.log full=y;
Estimate in progress using BLOCKS method...
Processing object type DATABASE_EXPORT/SCHEMA/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 1.635GB
Processing object type DATABASE_EXPORT/TABLESPACE
Processing object type DATABASE_EXPORT/PROFILE
Processing object type DATABASE_EXPORT/SYS_USER/USER
Processing object type DATABASE_EXPORT/SCHEMA/USER
Processing object type DATABASE_EXPORT/ROLE
Processing object type DATABASE_EXPORT/GRANT/SYSTEM_GRANT/PROC_SYSTEM_GRANT
Processing object type DATABASE_EXPORT/SCHEMA/GRANT/SYSTEM_GRANT
Processing object type DATABASE_EXPORT/SCHEMA/ROLE_GRANT
Processing object type DATABASE_EXPORT/SCHEMA/DEFAULT_ROLE
Processing object type DATABASE_EXPORT/SCHEMA/TABLESPACE_QUOTA
Processing object type DATABASE_EXPORT/RESOURCE_COST
Processing object type DATABASE_EXPORT/SCHEMA/DB_LINK
Processing object type DATABASE_EXPORT/TRUSTED_DB_LINK
Processing object type DATABASE_EXPORT/SCHEMA/SEQUENCE/SEQUENCE
Processing object type DATABASE_EXPORT/SCHEMA/SEQUENCE/GRANT/OWNER_GRANT/OBJECT_GRANT
Processing object type DATABASE_EXPORT/DIRECTORY/DIRECTORY
Processing object type DATABASE_EXPORT/DIRECTORY/GRANT/OWNER_GRANT/OBJECT_GRANT
Processing object type DATABASE_EXPORT/CONTEXT
Processing object type DATABASE_EXPORT/SCHEMA/PUBLIC_SYNONYM/SYNONYM
Processing object type DATABASE_EXPORT/SCHEMA/SYNONYM
原因为客户端与数据库的字符集设置不一致导致
查询客户端字符集：
SQL> show parameter nls_lan
NAME TYPE VALUE
------------------------------------ ---------------------- --------------------
nls_language string AMERICAN
查询数据库字符集
SQL> select * from
nls_database_parameters where parameter='NLS_CHARACTERSET';
PARAMETER VALUE
------------------------- ------------------------------
NLS_CHARACTERSET AL32UTF8
设置客户端字符集
C:\Users\Administrator>set
NLS_LANG=american_america.AL32UTF8
此后再来执行导出操作，无异常发生，而且导出日志也能完全显示.
