mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-04-18 21:44:02 +03:00
60eb0f86ec
the DELETE operation. ColumnOp::readBlock() calls can cause writes to database files when the active chunk list in ChunkManager is full. Since non-AUX columns are read-only for the DELETE operation, we prevent writes of compressed chunks and header for these columns by passing an isReadOnly flag to CompFileData which indicates whether the column is read-only or read-write.
60 lines
2.0 KiB
C++
60 lines
2.0 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_colopbulk.h 4726 2013-08-07 03:38:36Z bwilkinson $
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/** @file
|
|
* class ColumnOpBulk
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "we_colop.h"
|
|
|
|
#include <cstdio>
|
|
|
|
namespace WriteEngine
|
|
{
|
|
class Log;
|
|
|
|
/** @brief A "generic" implementation version of ColumnOp.
|
|
*
|
|
* This is minimal implementation of ColumnOp that is used by bulkload
|
|
* for both compressed and uncompressed column files.
|
|
*/
|
|
class ColumnOpBulk : public ColumnOp
|
|
{
|
|
public:
|
|
ColumnOpBulk();
|
|
ColumnOpBulk(Log* logger, int compressionType);
|
|
virtual ~ColumnOpBulk();
|
|
|
|
virtual bool abbreviatedExtent(IDBDataFile*, int) const;
|
|
virtual int blocksInFile(IDBDataFile*) const;
|
|
virtual IDBDataFile* openFile(const WriteEngine::Column& column, uint16_t dbRoot, uint32_t partition,
|
|
uint16_t segment, std::string& segFile, bool useTmpSuffix,
|
|
const char* mode = "r+b", int ioBuffSize = DEFAULT_BUFSIZ,
|
|
bool isReadOnly = false) const;
|
|
virtual int readBlock(IDBDataFile*, unsigned char*, const uint64_t);
|
|
virtual int saveBlock(IDBDataFile*, const unsigned char*, const uint64_t);
|
|
};
|
|
|
|
} // namespace WriteEngine
|