LbmSearchExecStream.h

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/*
// $Id: //open/dev/fennel/lucidera/bitmap/LbmSearchExecStream.h#5 $
// Fennel is a library of data storage and processing components.
// Copyright (C) 2006-2009 LucidEra, Inc.
// Copyright (C) 2006-2009 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_LbmSearchExecStream_Included
#define Fennel_LbmSearchExecStream_Included

#include "fennel/exec/DynamicParam.h"
#include "fennel/ftrs/BTreePrefetchSearchExecStream.h"

FENNEL_BEGIN_NAMESPACE

struct LbmSearchExecStreamParams : public BTreePrefetchSearchExecStreamParams
{
    DynamicParamId rowLimitParamId;

    DynamicParamId startRidParamId;
};

class FENNEL_LBM_EXPORT LbmSearchExecStream
    : public BTreePrefetchSearchExecStream
{
    bool ridInKey;

    DynamicParamId rowLimitParamId;

    bool ignoreRowLimit;

    DynamicParamId startRidParamId;

    RecordNum rowLimit;

    LcsRid startRid;

    TupleDatum rowLimitDatum;

    TupleDatum startRidDatum;

    TupleData ridSearchKeyData;

    bool ridKeySetup;

    virtual bool reachedTupleLimit(uint nTuples);

    virtual void setAdditionalKeys();

    virtual void setLowerBoundKey(PConstBuffer buf);

public:
    virtual void prepare(LbmSearchExecStreamParams const &params);
};

FENNEL_END_NAMESPACE

#endif

// End LbmSearchExecStream.h

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