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102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/*******************************************************************************
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* $Id: we_columninfocompressed.h 4450 2013-01-21 14:13:24Z rdempsey $
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*
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*******************************************************************************/
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/** @file
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* Contains main class used to manage compressed column information.
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*/
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#ifndef _WE_COLUMNINFOCOMPRESSED_H
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#define _WE_COLUMNINFOCOMPRESSED_H
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#include "we_columninfo.h"
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#include "we_fileop.h"
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#include "idbcompress.h"
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#include <vector>
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namespace WriteEngine
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{
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class RBMetaWriter;
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/** @brief Maintains information about a DB column.
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*/
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class ColumnInfoCompressed : public ColumnInfo
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{
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public:
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/** @brief Constructor.
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*/
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ColumnInfoCompressed(Log* logger,
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int id,
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const JobColumn& column,
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DBRootExtentTracker* pDBRootExtTrk,
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TableInfo* pTableInfo);
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//RBMetaWriter* rbMetaWriter);
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/** @brief Destructor
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*/
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virtual ~ColumnInfoCompressed();
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/** @brief Close the current Column file.
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* @param bCompletedExtent are we completing an extent
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* @param bAbort indicates if job is aborting and file should be
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* closed without doing extra work: flushing buffer, etc.
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*/
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virtual int closeColumnFile(bool bCompletingExtent, bool bAbort);
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/** @brief Truncate specified dictionary file. Only applies if compressed.
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* @param dctnryOid Dictionary store OID
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* @param root DBRoot of relevant dictionary store segment file.
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* @param pNum Partition number of relevant dictionary store segment file.
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* @param sNum Segment number of relevant dictionary store segment file.
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*/
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virtual int truncateDctnryStore(OID dctnryOid,
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uint16_t root, uint32_t pNum, uint16_t sNum) const;
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private:
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virtual int resetFileOffsetsNewExtent(const char* hdr);
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// Prepare initial compressed column seg file for importing of data.
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// oldHWM - Current HWM prior to initial block skipping. This is only
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// used for abbreviated extents, to detect when block skipping has
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// caused us to require a full expanded extent.
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// newHWM - Starting point for adding data after initial blockskipping
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virtual int setupInitialColumnFile( HWM oldHWM, HWM newHWM );
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virtual int saveDctnryStoreHWMChunk(bool& needBackup);
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virtual int extendColumnOldExtent(
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uint16_t dbRootNext,
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uint32_t partitionNext,
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uint16_t segmentNext,
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HWM hwmNext );
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RBMetaWriter* fRBMetaWriter;
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FileOp fTruncateDctnryFileOp; // Used to truncate dctnry store file
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};
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}
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#endif
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