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128 lines
3.3 KiB
C++
128 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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// $Id: framebound.h 3932 2013-06-25 16:08:10Z xlou $
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#ifndef UTILS_FRAMEBOUND_H
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#define UTILS_FRAMEBOUND_H
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#include <boost/shared_ptr.hpp>
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#include "rowgroup.h"
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#include "windowfunctionstep.h"
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namespace ordering
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{
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// forward reference
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class EqualCompData;
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};
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namespace windowfunction
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{
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const int WF__UNBOUNDED_PRECEDING = 0;
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const int WF__CONSTANT_PRECEDING = 1;
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const int WF__EXPRESSION_PRECEDING = 2;
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const int WF__CURRENT_ROW = 3;
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const int WF__UNBOUNDED_FOLLOWING = 4;
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const int WF__CONSTANT_FOLLOWING = 5;
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const int WF__EXPRESSION_FOLLOWING = 6;
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const int WF__BOUND_ALL = -1; // unbounded - unbounded
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const int WF__BOUND_ROLLING = -2; // unbounded - current row
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/** @brief class FrameBound
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*
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*/
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class FrameBound
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{
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public:
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/** @brief FrameBound constructor
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* @param t, frame type
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*/
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FrameBound(int t = 0) : fBoundType(t), fStart(true) {};
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/** @brief FrameBound destructor
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*/
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virtual ~FrameBound() {};
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/** @brief clone
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*/
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virtual FrameBound* clone()
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{ return new FrameBound(*this); }
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/** @brief virtual void getBound
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* @param b: partition start position
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* @param e: partition end position
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* @param c: current position
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* @return : frame position
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*/
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virtual int64_t getBound(int64_t b, int64_t e, int64_t c);
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virtual const std::string toString() const;
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void setRowData(const boost::shared_ptr<std::vector<joblist::RowPosition> >& d) {fRowData = d;}
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void setRowMetaData(const rowgroup::RowGroup& g, const rowgroup::Row& r)
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{ fRowGroup = g; fRow = r; }
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int64_t boundType() const { return fBoundType; }
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void boundType(int64_t t) { fBoundType = t; }
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bool start() const { return fStart; }
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void start(bool s) { fStart = s; }
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const boost::shared_ptr<ordering::EqualCompData>& peer() const { return fPeer; }
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void peer(const boost::shared_ptr<ordering::EqualCompData>& p) { fPeer = p; }
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// for string table
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void setCallback(joblist::WindowFunctionStep* step) { fStep = step; }
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rowgroup::Row::Pointer getPointer(joblist::RowPosition& r)
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{ return fStep->getPointer(r, fRowGroup, fRow); }
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protected:
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// boundary type
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int64_t fBoundType;
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bool fStart;
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// data
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boost::shared_ptr<std::vector<joblist::RowPosition> > fRowData;
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// row meta data
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rowgroup::RowGroup fRowGroup;
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rowgroup::Row fRow;
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// functor for peer checking
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boost::shared_ptr<ordering::EqualCompData> fPeer;
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// pointer back to step
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joblist::WindowFunctionStep* fStep;
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};
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extern std::map<int, std::string> colType2String;
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} // namespace
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#endif // UTILS_FRAMEBOUND_H
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// vim:ts=4 sw=4:
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