dbWriteTable of RPostgreSQL can't insert data into PostgreSQL Server.

Thanks Brian,

That is simply wrong.  fileEncoding is a convenience for those too
intellectually challenged to be able to use a file() connection,
something which was always supported.

While I have not found the right document yet,
do you mean that by 2.12 one more line was required for setting  
encoding,
and as of 2.13, it becomes just one more argument?

in old style:
fc <- file('filename', encoding='UTF-8')
write.table(data.frame, file=fc,...)

new style:
write.table(data.frame, file='filename', fileEncoding='UTF-8',...)

I actually noticed "All of these functions can write to a connection  
which
allows an encoding to be specified for the file,"
but unfortunately it was not linked to any place, and finding the
way to do it required more searches.

Tomoaki NISHIYAMA

Advanced Science Research Center,
Kanazawa University,
13-1 Takara-machi,
Kanazawa, 920-0934, Japan