Hi Peter The -n flag worked fine on OS X. I don’t have this issue on Centos. As a side question I wonder why was postgres built with libedit instead of libreadline , just curious. Back to my developer issue , he is using what he calls a data object in java. Apparently this is the place where this bad conversion happens, in other words it passes to the backend the ?? characters Any similar trick I could use on the postgres jdbc driver ? Will report more once I find more from him Many thanks Armand > On Jan 11, 2018, at 4:12 PM, Peter Eisentraut <peter.eisentraut@xxxxxxxxxxxxxxx> wrote: > > On 1/11/18 16:34, armand pirvu wrote: >> On OS X: >> - case 1 fails >> testdb=# insert into jt1 values ('??') ; >> ERROR: invalid byte sequence for encoding "UTF8": 0xe2 0xa4 0x27 >> Note that at paste time ≤ changed in ?? > > This looks like something is wrong with your libedit library. Try > running psql with the -n option. If that helps, then look into building > psql with libreadline instead. Because libedit is terrible. > >> - case 2 is fine >> - echo -n '≤' |hexdump -C >> 00000000 e2 89 a4 |...| >> 00000003 > > -- > Peter Eisentraut http://www.2ndQuadrant.com/ > PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services