LcsClusterReplaceExecStream.h

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/*
// $Id: //open/dev/fennel/lucidera/colstore/LcsClusterReplaceExecStream.h#5 $
// Fennel is a library of data storage and processing components.
// Copyright (C) 2005-2009 LucidEra, Inc.
// Copyright (C) 2005-2009 The Eigenbase Project
//
// 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; either version 2 of the License, or (at your option)
// any later version approved by The Eigenbase Project.
//
// 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef Fennel_LcsClusterReplaceExecStream_Included
#define Fennel_LcsClusterReplaceExecStream_Included

#include "fennel/lucidera/colstore/LcsClusterAppendExecStream.h"
#include "fennel/segment/SnapshotRandomAllocationSegment.h"
#include "fennel/exec/DynamicParam.h"
#include "fennel/tuple/TupleProjectionAccessor.h"
#include "fennel/tuple/UnalignedAttributeAccessor.h"
#include "fennel/tuple/TupleDataWithBuffer.h"

FENNEL_BEGIN_NAMESPACE

struct LcsClusterReplaceExecStreamParams :
    public LcsClusterAppendExecStreamParams
{
};

class FENNEL_LCS_EXPORT LcsClusterReplaceExecStream
    : public LcsClusterAppendExecStream
{
    DynamicParamId newClusterRootParamId;

    TupleDescriptor projInputTupleDesc;

    TupleData projInputTupleData;

    std::vector<UnalignedAttributeAccessor> attrAccessors;

    SnapshotRandomAllocationSegment *pSnapshotSegment;

    SharedLcsClusterReader pOrigClusterReader;

    RecordNum origNumRows;

    PageId origRootPageId;

    LcsRid currLoadRid;

    bool needTuple;

    LcsRid currInputRid;

    TupleProjectionAccessor clusterColsTupleAccessor;

    TupleDataWithBuffer origClusterTupleData;

    bool newData;

    virtual void initTupleLoadParams(const TupleProjection &inputProj);

    virtual ExecStreamResult getTupleForLoad();

    virtual void postProcessTuple();

    void readOrigClusterRow();

    virtual void close();

public:
    virtual void prepare(LcsClusterReplaceExecStreamParams const &params);
    virtual void open(bool restart);
    virtual void getResourceRequirements(
        ExecStreamResourceQuantity &minQuantity,
        ExecStreamResourceQuantity &optQuantity);
};


FENNEL_END_NAMESPACE

#endif

// End LcsClusterReplaceExecStream.h

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