mariadb-columnstore-engine/dbcon/execplan/pseudocolumn.h

/* Copyright (C) 2014 InfiniDB, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; version 2 of
   the License.

   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 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 Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

/***********************************************************************
 *   $Id: simplecolumn.h 9679 2013-07-11 22:32:03Z zzhu $
 *
 *
 ***********************************************************************/
/** @file */

#pragma once
#include <string>
#include "simplecolumn.h"

namespace messageqcpp
{
class ByteStream;
}

/**
 * Namespace
 */
namespace execplan
{
const uint32_t PSEUDO_UNKNOWN = 0;
const uint32_t PSEUDO_EXTENTRELATIVERID = 1;
const uint32_t PSEUDO_DBROOT = 2;
const uint32_t PSEUDO_PM = 3;
const uint32_t PSEUDO_SEGMENT = 4;
const uint32_t PSEUDO_SEGMENTDIR = 5;
const uint32_t PSEUDO_EXTENTMIN = 6;
const uint32_t PSEUDO_EXTENTMAX = 7;
const uint32_t PSEUDO_BLOCKID = 8;
const uint32_t PSEUDO_EXTENTID = 9;
const uint32_t PSEUDO_PARTITION = 10;
const uint32_t PSEUDO_LOCALPM = 11;

/**
 * @brief A class to represent a pseudo column
 *
 * This class is a specialization of class SimpleColumn that handles
 * a pseudocolumn.
 */
class PseudoColumn : public SimpleColumn
{
 public:
  /**
   * Constructors
   */
  PseudoColumn();
  PseudoColumn(const uint32_t pseudoType);
  PseudoColumn(const std::string& token, const uint32_t pseudoType, const uint32_t sessionID = 0);
  PseudoColumn(const std::string& schema, const std::string& table, const std::string& col,
               const uint32_t pseudoType, const uint32_t sessionID = 0);
  PseudoColumn(const std::string& schema, const std::string& table, const std::string& col,
               const bool isColumnStore, const uint32_t pseudoType, const uint32_t sessionID = 0);
  PseudoColumn(const SimpleColumn& rhs, const uint32_t pseudoType, const uint32_t sessionID = 0);
  PseudoColumn(const PseudoColumn& rhs, const uint32_t sessionID = 0);

  /**
   * Destructor
   */
  virtual ~PseudoColumn();

  /** return a copy of this pointer
   *
   * deep copy of this pointer and return the copy
   */
  inline virtual PseudoColumn* clone() const override
  {
    return new PseudoColumn(*this);
  }

  /**
   * Overloaded assignment operator
   */
  PseudoColumn& operator=(const PseudoColumn& rhs);

  /**
   * Accessor and mutator
   */
  uint32_t pseudoType() const
  {
    return fPseudoType;
  }

  void pseudoType(const uint32_t pseudoType)
  {
    fPseudoType = pseudoType;
  }

  /**
   * The serialize interface
   */
  virtual void serialize(messageqcpp::ByteStream&) const override;
  virtual void unserialize(messageqcpp::ByteStream&) override;

  virtual const std::string toString() const override;

  /** @brief Do a deep, strict (as opposed to semantic) equivalence test
   *
   * Do a deep, strict (as opposed to semantic) equivalence test.
   * @return true iff every member of t is a duplicate copy of every member of this; false otherwise
   */
  virtual bool operator==(const TreeNode* t) const override;

  /** @brief Do a deep, strict (as opposed to semantic) equivalence test
   *
   * Do a deep, strict (as opposed to semantic) equivalence test.
   * @return true iff every member of t is a duplicate copy of every member of this; false otherwise
   */
  bool operator==(const PseudoColumn& t) const;

  /** @brief Do a deep, strict (as opposed to semantic) equivalence test
   *
   * Do a deep, strict (as opposed to semantic) equivalence test.
   * @return false iff every member of t is a duplicate copy of every member of this; true otherwise
   */
  virtual bool operator!=(const TreeNode* t) const override;

  /** @brief Do a deep, strict (as opposed to semantic) equivalence test
   *
   * Do a deep, strict (as opposed to semantic) equivalence test.
   * @return false iff every member of t is a duplicate copy of every member of this; true otherwise
   */
  bool operator!=(const PseudoColumn& t) const;

  static uint32_t pseudoNameToType(std::string& name);

  virtual std::string toCppCode(IncludeSet& includes) const override;

 private:
  /**
   * Fields
   */
  uint32_t fPseudoType;
  void adjustResultType();
};

}  // namespace execplan