mariadb-columnstore-engine/writeengine/shared/we_blockop.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: we_blockop.h 4450 2013-01-21 14:13:24Z rdempsey $
 *
 *******************************************************************************/
/** @file */

#pragma once

#include <we_obj.h>

#define EXPORT

/** Namespace WriteEngine */
namespace WriteEngine
{
/** Class BlockOp */
class BlockOp : public WEObj
{
 public:
  /**
   * @brief Constructor
   */
  EXPORT BlockOp();

  /**
   * @brief Default Destructor
   */
  EXPORT ~BlockOp();

  /**
   * @brief Calculate the location of Row ID
   */
  EXPORT bool calculateRowId(RID rowId, const int epb, const int width, int& fbo, int& bio) const;

  /**
   * @brief Calculate the location of Row ID
   */
  void clearBlock(DataBlock* block)
  {
    memset(block->data, 0, sizeof(block->data));
    block->no = -1;
    block->dirty = false;
  }

  /**
   * @brief Get bit value after shift
   */
  uint64_t getBitValue(uint64_t val, int shiftBit, uint64_t mask) const
  {
    return (val >> shiftBit) & mask;
  }

  /**
   * @brief Get correct row width
   */
  EXPORT int getCorrectRowWidth(const execplan::CalpontSystemCatalog::ColDataType colDataType,
                                const int width) const;

  /**
   * @brief Get an empty row value
   */
  EXPORT const uint8_t* getEmptyRowValue(const execplan::CalpontSystemCatalog::ColDataType colDataType,
                                         const int width) const;

  /**
   * @brief Calculate row id
   */
  EXPORT RID getRowId(const long fbo, const int width, const int rowPos) const;

  /**
   * @brief Get buffer value
   */
  EXPORT void readBufValue(const unsigned char* buf, void* val, const short width) const;

  /**
   * @brief Reset a buffer
   */
  EXPORT void resetBuf(unsigned char* buf, const int bufSize) const;

  /**
   * @brief Fill buffer with empty values
   */
  EXPORT void static setEmptyBuf(unsigned char* buf, const int bufSize, const uint8_t* emptyVal,
                                 const int width);

  /**
   * @brief Set a value in a buffer
   */
  EXPORT void writeBufValue(unsigned char* buf, const void* val, const size_t width,
                            const bool clear = false) const;
  EXPORT void findTypeHandler(const int colWidth,
                              const execplan::CalpontSystemCatalog::ColDataType colDataType);

 private:
  const datatypes::TypeHandler* m_typeHandler;
};

}  // namespace WriteEngine

#undef EXPORT