greenplumn CPoint 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/statistics/CPoint.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2011 EMC Corp.
/
/ @filename:
/ CPoint.h
/
/ @doc:
/ Point in the datum space
/---------------------------------------------------------------------------
#ifndef GPNAUCRATES_CPoint_H
#define GPNAUCRATES_CPoint_H
#include "gpos/base.h"
#include "gpos/common/CDouble.h"
#include "naucrates/base/IDatum.h"
namespace gpopt
{
class CMDAccessor;
}
namespace gpnaucrates
{
using namespace gpos;
using namespace gpmd;
using namespace gpopt;
/---------------------------------------------------------------------------
/ @class:
/ CPoint
/
/ @doc:
/ One dimensional point in the datum space
/---------------------------------------------------------------------------
class CPoint : public CRefCount, public DbgPrintMixin<CPoint>
{
private:
/ datum corresponding to the point
IDatum *m_datum;
public:
CPoint &operator=(CPoint &) = delete;
CPoint(const CPoint &) = delete;
/ c'tor
explicit CPoint(IDatum *);
/ get underlying datum
IDatum *
GetDatum() const
{
return m_datum;
}
/ is this point equal to another
BOOL Equals(const CPoint *) const;
/ is this point not equal to another
BOOL IsNotEqual(const CPoint *) const;
/ less than
BOOL IsLessThan(const CPoint *) const;
/ less than or equals
BOOL IsLessThanOrEqual(const CPoint *) const;
/ greater than
BOOL IsGreaterThan(const CPoint *) const;
/ greater than or equals
BOOL IsGreaterThanOrEqual(const CPoint *) const;
/ distance between two points
CDouble Distance(const CPoint *) const;
/ distance between two points, taking bounds into account
CDouble Width(const CPoint *, BOOL include_lower, BOOL include_upper) const;
/ print function
IOstream &OsPrint(IOstream &os) const;
/ d'tor
~CPoint() override
{
m_datum->Release();
}
/ translate the point into its DXL representation
CDXLDatum *GetDatumVal(CMemoryPool *mp, CMDAccessor *md_accessor) const;
/ minimum of two points using <=
static CPoint *MinPoint(CPoint *point1, CPoint *point2);
/ maximum of two points using >=
static CPoint *MaxPoint(CPoint *point1, CPoint *point2);
}; / class CPoint
/ array of CPoints
using CPointArray = CDynamicPtrArray<CPoint, CleanupRelease>;
} / namespace gpnaucrates
#endif / !GPNAUCRATES_CPoint_H
/ EOF
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