/*
 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2.0,
 * as published by the Free Software Foundation.
 *
 * This program is also distributed with certain software (including
 * but not limited to OpenSSL) that is licensed under separate terms,
 * as designated in a particular file or component or in included license
 * documentation.  The authors of MySQL hereby grant you an additional
 * permission to link the program and your derivative works with the
 * separately licensed software that they have included with MySQL.
 *  
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License, version 2.0, for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
 */

// tell protobuf 3.0 to use protobuf 2.x rules
syntax = "proto2";

// ifdef PROTOBUF_LITE: option optimize_for = LITE_RUNTIME;

package Polarx;
option java_package = "com.mysql.cj.x.protobuf";

// style-guide:
//
// see https://developers.google.com/protocol-buffers/docs/style
//
// message CamelCaseMsg {
//   enum CamelCaseEnum {
//     FIRST_VALUE = 1;
//   }
//   required CamelCaseEnum some_enum = 1;
// }
//


// IDs of messages that can be sent from client to the server
//
// .. note::
//   this message is never sent on the wire. It is only used to let ``protoc``
//
//   * generate constants
//   * check for uniqueness
message ClientMessages {
  enum Type {
    CON_CAPABILITIES_GET = 1;
    CON_CAPABILITIES_SET = 2;
    CON_CLOSE = 3;

    SESS_AUTHENTICATE_START = 4;
    SESS_AUTHENTICATE_CONTINUE  = 5;
    SESS_RESET = 6;
    SESS_CLOSE = 7;

    SQL_STMT_EXECUTE = 12;

    CRUD_FIND = 17;
    CRUD_INSERT = 18;
    CRUD_UPDATE = 19;
    CRUD_DELETE = 20;

    EXPECT_OPEN = 24;
    EXPECT_CLOSE = 25;

    EXEC_PLAN_READ = 100;
    EXEC_SQL = 101;

    SESS_NEW = 110;
    SESS_KILL = 111;

    TOKEN_OFFER = 112;

    GET_TSO = 113;

    MSG_MAX = 127;
  }
}

// IDs of messages that can be sent from server to client
//
// .. note::
//   this message is never sent on the wire. It is only used to let ``protoc``
//
//   * generate constants
//   * check for uniqueness
message ServerMessages {
  enum Type {
    OK = 0;
    ERROR = 1;

    CONN_CAPABILITIES = 2;

    SESS_AUTHENTICATE_CONTINUE = 3;
    SESS_AUTHENTICATE_OK = 4;

    // NOTICE has to stay at 11 forever
    NOTICE = 11;

    RESULTSET_COLUMN_META_DATA = 12;
    RESULTSET_ROW = 13;
    RESULTSET_FETCH_DONE = 14;
    RESULTSET_FETCH_SUSPENDED = 15;
    RESULTSET_FETCH_DONE_MORE_RESULTSETS = 16;

    SQL_STMT_EXECUTE_OK = 17;
    RESULTSET_FETCH_DONE_MORE_OUT_PARAMS = 18;

    RESULTSET_TOKEN_DONE = 19;

    RESULTSET_TSO = 20;

    RESULTSET_CHUNK = 21;
  }
}

// generic Ok message
message Ok {
  optional string msg = 1;
}


// generic Error message
//
// A ``severity`` of ``ERROR`` indicates the current message sequence is
// aborted for the given error and the session is ready for more.
//
// In case of a ``FATAL`` error message the client should not expect
// the server to continue handling any further messages and should
// close the connection.
//
// :param severity: severity of the error message
// :param code: error-code
// :param sql_state: SQL state
// :param msg: human readable error message
message Error {
  optional Severity severity = 1 [ default = ERROR ];
  required uint32 code = 2;
  required string sql_state = 4;
  required string msg = 3;

  enum Severity {
    ERROR = 0;
    FATAL = 1;
  }

}