The Postgresql JDBC driver does not accept this statement:
SET client_encoding = 'UTF8';

It fails with:
"org.postgresql.util.PSQLException: The server's client_encoding
parameter was changed to UTF8. The JDBC driver requires client_encoding
to be UNICODE for correct operation."

I consider that to be a bug. The UNICODE is an alias for UTF8.

Starting from 8.2, the pg_dump exports 'UTF8'
even when --encoding=UNICODE is used.
See:
$ pg_dump --version
pg_dump (PostgreSQL) 8.2.6
$ pg_dump --encoding=UNICODE template1 | grep client_encoding
SET client_encoding = 'UTF8';


The check for value.equals('UNICODE') is inside
org/postgresql/core/v3/QueryExecutorImpl.java

Thanks for the driver,
--
Ivo Danihelka


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