Hi Tom, Thanks. You guys are right. I check the database. The C programm is there. ----- but why our application team keep ask me to give them the superuser privileges to create the C function. Should they use the superuser to create the C function. if yes , why they need it? Thanks. Regards. Grace -- View this message in context: http://postgresql.1045698.n5.nabble.com/How-to-create-c-language-in-postgresql-database-Thanks-tp5712221p5712244.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general