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 */

#ifndef PSEUDOCOLUMN_H
#define PSEUDOCOLUMN_H
#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 isInfiniDB,
                 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
    {
        return new PseudoColumn (*this);
    }

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

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

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

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

    virtual const std::string toString() const;

    /** @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;

    /** @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;

    /** @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);


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

} // namespace execplan

#endif //PSEUDOCOLUMN_H