At Mon, 08 Aug 2016 17:18:21 +0900 (Tokyo Standard Time), Kyotaro HORIGUCHI <horiguchi.kyot...@lab.ntt.co.jp> wrote in <20160808.171821.100221089.horiguchi.kyot...@lab.ntt.co.jp> > Looking at check_client_encoding(), the comment says as following. > > | * If we are not within a transaction then PrepareClientEncoding will not > | * be able to look up the necessary conversion procs. If we are still > | * starting up, it will return "OK" anyway, and InitializeClientEncoding > | * will fix things once initialization is far enough along. After > > We shold overcome this to realize startup-time check for > conversion procs.
Somewhat wrong. The core problem is the procedures offered by PrepareClientEncoding is choosed only by encoding->encoding basis, not counting character set compatibility. So, currently this is not detectable before actually doing conversion of a character stream. Conversely, providing a means to check character-set compatibility will naturally fixes this. Check at session-startup (out-of-transaction check?) is still another problem. regards, -- Kyotaro Horiguchi NTT Open Source Software Center -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers