You've already forked mariadb-columnstore-engine
mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-10-31 18:30:33 +03:00
112 lines
3.1 KiB
C++
112 lines
3.1 KiB
C++
/* 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_colbufsec.h 4450 2013-01-21 14:13:24Z rdempsey $
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/** @file
|
|
* class ColumnBufferSection
|
|
*/
|
|
#pragma once
|
|
|
|
#include "we_type.h"
|
|
#include "we_colbuf.h"
|
|
|
|
namespace WriteEngine
|
|
{
|
|
/* @brief Status codes for the ColumnBufferSection
|
|
*/
|
|
enum
|
|
{
|
|
INIT_COMPLETE,
|
|
WRITE_COMPLETE,
|
|
};
|
|
|
|
/**
|
|
* @brief ColumnBufferSection class represent a section of the ColumnBuffer and
|
|
* provides functionality for writing to the ColumnBuffer.
|
|
*/
|
|
class ColumnBufferSection
|
|
{
|
|
public:
|
|
/* @brief Constructor
|
|
*
|
|
* @param cb Ptr to this section's corresponding CoulmnBuffer
|
|
* @param startRowId Starting row-id of the column
|
|
* @param endRowId Ending row-id of the column
|
|
* @param Width Width of the underlying column
|
|
* @param startOffset
|
|
*/
|
|
ColumnBufferSection(ColumnBuffer* const cb, RID startRowId, RID endRowId, int colWidth, int startOffset);
|
|
|
|
/* @brief Default destructor
|
|
*/
|
|
~ColumnBufferSection();
|
|
|
|
/* @brief Updates the status of the section
|
|
*
|
|
* @param Status value
|
|
*/
|
|
void setStatus(int status);
|
|
|
|
/* @brief Write data into the column buffer section
|
|
*
|
|
* @param data pointer to the data
|
|
* @param nRows Number of rows to be written, starting from data pointer
|
|
*/
|
|
void write(const void* const data, int nRows);
|
|
|
|
/* @brief Returns the current status of the section
|
|
*/
|
|
int getStatus() const;
|
|
|
|
/* @brief Returns the start offset of this section
|
|
*/
|
|
int getStartOffset() const;
|
|
|
|
/* @brief Returns the size of this section
|
|
*/
|
|
int getSectionSize() const;
|
|
|
|
/* @brief Returns the ending row-id of this section
|
|
*/
|
|
RID endRowId() const
|
|
{
|
|
return fEndRowId;
|
|
}
|
|
|
|
/* @brief Returns the starting row-id of this section
|
|
*/
|
|
RID startRowId() const
|
|
{
|
|
return fStartRowId;
|
|
}
|
|
|
|
private:
|
|
const ColumnBuffer* const fCBuf; // ColumnBuffer associated with this section
|
|
RID fStartRowId; // Starting row-id for this section
|
|
RID fEndRowId; // Ending row-id for this section
|
|
int fColWidth; // Width of column (in bytes)
|
|
int fBufStartOffset; // Starting offset of this section in ColumnBuffer
|
|
RID fCurrRowId; // row-id which will be written next
|
|
int fStatus; // Status of this section
|
|
};
|
|
|
|
} // namespace WriteEngine
|