log both user error code and internal error code while sending error packet

src/observer/mysql/obmp_base.cpp

@@ -1232,8 +1232,11 @@ int ObMPBase::send_error_packet(
 
     OMPKError epacket;
     // TODO Negotiate a err for rerouting sql
-    epacket.set_errcode(static_cast<uint16_t>(ob_errpkt_errno(err, lib::is_oracle_mode())));
-    ret = epacket.set_sqlstate(ob_sqlstate(err));
+    const int user_error_code = ob_errpkt_errno(err, lib::is_oracle_mode());
+    const char *sql_state = ob_sqlstate(err);
+    LOG_INFO("send error package.", K(user_error_code), K(err), K(sql_state), K(message));
+    epacket.set_errcode(static_cast<uint16_t>(user_error_code));
+    ret = epacket.set_sqlstate(sql_state);
     if (OB_SUCC(ret) && OB_SUCC(epacket.set_message(message))) {
       comp_context_.update_last_pkt_pos(ez_buf_->last);
       if (OB_FAIL(response_packet(epacket))) {