query_optimizer/logical/Join.hpp

/**
 *   Copyright 2011-2015 Quickstep Technologies LLC.
 *   Copyright 2015 Pivotal Software, Inc.
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 **/

#ifndef QUICKSTEP_QUERY_OPTIMIZER_LOGICAL_JOIN_HPP_
#define QUICKSTEP_QUERY_OPTIMIZER_LOGICAL_JOIN_HPP_

#include <memory>
#include "query_optimizer/logical/Logical.hpp"
#include "utility/Macros.hpp"

namespace quickstep {
namespace optimizer {
namespace logical {

/** \addtogroup OptimizerLogical
 *  @{
 */

class Join;
typedef std::shared_ptr<const Join> JoinPtr;

/**
 * @brief Base class for logical join operator that combines tuples from two or
 *        more relations based on join predicates.
 */
class Join : public Logical {
 public:
  /**
   * @brief Destructor.
   */
  ~Join() override {}

 protected:
  /**
   * @brief Constructor.
   */
  Join() {}

 private:
  DISALLOW_COPY_AND_ASSIGN(Join);
};

/** @} */

}  // namespace logical
}  // namespace optimizer
}  // namespace quickstep

#endif /* QUICKSTEP_QUERY_OPTIMIZER_LOGICAL_JOIN_HPP_ */