Postgres error message limited to 70 char in sqlca

Hi,

1 ) Can I tune postgres to force using more than 70 characters in "sqlca
sqlerrm.sqlerrmc" ?

It's too short, i've got some message truncated like that:
"column 'flow_cons_date' is of type timestamp without time zo [code=-400]"

I'd like to have more information in my application log files !

I've tried to change the value in sqlca.h but there's still only 70
characters usefull.

2) I'm still looking for an answer to "socket command type unknow"
this thread: http://archives.postgresql
org/pgsql-interfaces/2004-05/msg00011.php

Thanks