/*
 * Copyright (c) 2017, 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
 */

// MySQL DB access module, for use by plugins and others
// For the module that implements interactive DB functionality see mod_db

#ifndef PLUGIN_X_CLIENT_XQUERY_INSTANCES_H_
#define PLUGIN_X_CLIENT_XQUERY_INSTANCES_H_

#include <memory>

namespace xcl {

class Query_instances {
 public:
  using Instance_id = uint64_t;

 public:
  virtual ~Query_instances() {}

  virtual Instance_id instances_fetch_begin() = 0;
  virtual void instances_fetch_end() = 0;
  virtual bool is_instance_active(const Instance_id id) = 0;
};

}  // namespace xcl

#endif  // PLUGIN_X_CLIENT_XQUERY_INSTANCES_H_