Hi,I'm using oracle 10.2.0.1 for studing, and I queried the v$session using pl/sql developer from a windows pc client ,but I found the garbled code from the results.just as following:
SQL> select osuser from v$session;
OSUSER
--------
SYSTEM
????
SYSTEM
abc
??????????
then I ran the same command from the DB server,but I got the same results.
Here are the characterset:
SQL> select userenv('language') from dual;
USERENV('LANGUAGE')
----------------------------------------------------
SIMPLIFIED CHINESE_CHINA.ZHS16GBK
SQL> select * from v$nls_parameters;
PARAMETER VALUE
---------------------------------------------------------------- ----------------------------------------------------------------
NLS_LANGUAGE SIMPLIFIED CHINESE
NLS_TERRITORY CHINA
NLS_CURRENCY ￥
NLS_ISO_CURRENCY CHINA
NLS_NUMERIC_CHARACTERS .,
NLS_CALENDAR GREGORIAN
NLS_DATE_FORMAT DD-MON-RR
NLS_DATE_LANGUAGE SIMPLIFIED CHINESE
NLS_CHARACTERSET ZHS16GBK
NLS_SORT BINARY
NLS_TIME_FORMAT HH.MI.SSXFF AM
NLS_TIMESTAMP_FORMAT DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_TZ_FORMAT HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_TZ_FORMAT DD-MON-RR HH.MI.SSXFF AM TZR
NLS_DUAL_CURRENCY ￥
NLS_NCHAR_CHARACTERSET UTF8
NLS_COMP BINARY
NLS_LENGTH_SEMANTICS BYTE
NLS_NCHAR_CONV_EXCP FALSE
19 rows selectedI also set the environment variable in my windows os :
NLS_LANG=SIMPLIFIED CHINESE_CHINA.ZHS16GBK
What's more,I tested my db as following:
SQL> select '中文' from dual;
'中文'
----
中文
Now,Could you please help me,why I got some garbled codes such as ??? when querying osuser from v$session?
thanks a lot.