# File lib/og/backends/psql.rb, line 140
        def self.insert_code(klass, sql, pre_cb, post_cb)
                %{
                        #{pre_cb}
                        res = conn.db.query("SELECT nextval('#{klass::DBSEQ}')")
                        @oid = res.getvalue(0, 0).to_i
                        conn.exec "#{sql}"
                        #{post_cb}
                }
        end