UTF-8 encoding problem

hi

I use UTF-8 as server character encoding,
and use sjis as client character encoding.
For some reason, some none sjis encoding character was insert into the database.
WHEN I use
set client_encoding='SJIS
select * from xxx
I got such error message
Native Error: ERROR: character 0xc2a0 of encoding "UTF8" has no equivalent in "SJIS"

I just want to ignore the none-sjis encoding character and go on without any
errors.
I use postgresql8.1, it seems that the postgresql shoud report error at the case
-----------------------------
If the conversion of a particular character is not possible ? suppose you chose EUC_JP for the server and LATIN1 for
theclient, then some Japanese characters do not have a representation in LATIN1 ? then an error is reported.  
-----------------------------

Can I ignore the error message by confiing the config file?

Thanks for any idea.

bhyuan