mariadb-columnstore-engine/dbcon/joblist/lbidlist.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: lbidlist.h 9655 2013-06-25 23:08:13Z xlou $
*
*
***********************************************************************/
/** @file */

#ifndef JOBLIST_LBIDLIST_H
#define JOBLIST_LBIDLIST_H

#include <boost/shared_ptr.hpp>
#include "joblisttypes.h"
#include "calpontsystemcatalog.h"
#include "brmtypes.h"
#include "bytestream.h"
#include <iostream>
#include "brm.h"
#ifdef _MSC_VER
#include <unordered_map>
#else
#include <tr1/unordered_map>
#endif

namespace joblist
{

typedef BRM::LBIDRange_v LBIDRangeVector;

/** @brief struct MinMaxPartition
 *
 */
struct MinMaxPartition
{
    int64_t lbid;
    int64_t lbidmax;
    int64_t min;
    int64_t max;
    int64_t seq;
    int     isValid;
    uint32_t blksScanned;
};

/** @brief class LBIDList
 *
 */
class LBIDList
{
public:

    explicit LBIDList(const execplan::CalpontSystemCatalog::OID oid,
                      const int debug);

    explicit LBIDList(const int debug);

    void init(const execplan::CalpontSystemCatalog::OID oid,
              const int debug);

    virtual ~LBIDList();

    void Dump(long Index, int Count) const;
    uint32_t GetRangeSize() const
    {
        return LBIDRanges.size() ? LBIDRanges.at(0).size : 0;
    }

    // Functions to handle min/max values per lbid for casual partitioning;
    // If pEMEntries is provided, then min/max will be extracted from that
    // vector, else extents in BRM will be searched. If type is unsigned, caller
    // should static cast returned min and max to uint64_t
    bool GetMinMax(int64_t& min, int64_t& max, int64_t& seq, int64_t lbid,
                   const std::vector<struct BRM::EMEntry>* pEMEntries,
                   execplan::CalpontSystemCatalog::ColDataType type);

    bool GetMinMax(int64_t* min, int64_t* max, int64_t* seq, int64_t lbid,
                   const std::tr1::unordered_map<int64_t, BRM::EMEntry>& entries,
                   execplan::CalpontSystemCatalog::ColDataType type);

    void UpdateMinMax(int64_t min, int64_t max, int64_t lbid,
                      execplan::CalpontSystemCatalog::ColDataType type, bool validData = true);

    void UpdateAllPartitionInfo();

    bool IsRangeBoundary(uint64_t lbid);

    bool CasualPartitionPredicate(const int64_t Min,
                                  const int64_t Max,
                                  const messageqcpp::ByteStream* MsgDataPtr,
                                  const uint16_t NOPS,
                                  const execplan::CalpontSystemCatalog::ColType& ct,
                                  const uint8_t BOP);

    bool checkSingleValue(int64_t min, int64_t max, int64_t value,
                          execplan::CalpontSystemCatalog::ColDataType type);

    bool checkRangeOverlap(int64_t min, int64_t max, int64_t tmin, int64_t tmax,
                           execplan::CalpontSystemCatalog::ColDataType type);

    // check the column data type and the column size to determine if it
    // is a data type  to apply casual paritioning.
    bool CasualPartitionDataType(const execplan::CalpontSystemCatalog::ColDataType type, const uint8_t size) const;

    LBIDList(const LBIDList& rhs)
    {
        copyLbidList(rhs);
    }

    LBIDList& operator=(const LBIDList& rhs)
    {
        copyLbidList(rhs);
        return *this;
    }

private:
    LBIDList();

    void copyLbidList(const LBIDList& rhs);

    template<class T>
    inline bool compareVal(const T& Min, const T& Max, const T& value, char op, uint8_t lcf);

    int  getMinMaxFromEntries(int64_t& min, int64_t& max, int32_t& seq,
                              int64_t lbid, const std::vector<struct BRM::EMEntry>& EMEntries);

    boost::shared_ptr<BRM::DBRM> em;
    std::vector<MinMaxPartition*> lbidPartitionVector;
    LBIDRangeVector LBIDRanges;
    int fDebug;

}; // LBIDList


} // joblist
#endif