greenplumn CStatsPredPoint 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/statistics/CStatsPredPoint.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2013 EMC Corp.
/
/ @filename:
/ CStatsPredPoint.h
/
/ @doc:
/ Point filter on statistics
/---------------------------------------------------------------------------
#ifndef GPNAUCRATES_CStatsPredPoint_H
#define GPNAUCRATES_CStatsPredPoint_H
#include "gpos/base.h"
#include "naucrates/md/IMDType.h"
#include "naucrates/statistics/CPoint.h"
#include "naucrates/statistics/CStatsPred.h"
/ fwd declarations
namespace gpopt
{
class CColRef;
}
namespace gpnaucrates
{
using namespace gpos;
using namespace gpmd;
using namespace gpopt;
/---------------------------------------------------------------------------
/ @class:
/ CStatsPredPoint
/
/ @doc:
/ Point filter on statistics
/---------------------------------------------------------------------------
class CStatsPredPoint : public CStatsPred
{
private:
/ comparison type
CStatsPred::EStatsCmpType m_stats_cmp_type;
/ point to be used for comparison
CPoint *m_pred_point;
/ add padding to datums when needed
static IDatum *PreprocessDatum(CMemoryPool *mp, const CColRef *colref,
IDatum *datum);
public:
CStatsPredPoint &operator=(CStatsPredPoint &) = delete;
CStatsPredPoint(const CStatsPredPoint &) = delete;
/ ctor
CStatsPredPoint(ULONG colid, CStatsPred::EStatsCmpType stats_cmp_type,
CPoint *point);
/ ctor
CStatsPredPoint(CMemoryPool *mp, const CColRef *colref,
CStatsPred::EStatsCmpType stats_cmp_type, IDatum *datum);
/ dtor
~CStatsPredPoint() override
{
m_pred_point->Release();
}
/ comparison types for stats computation
virtual CStatsPred::EStatsCmpType
GetCmpType() const
{
return m_stats_cmp_type;
}
/ filter point
virtual CPoint *
GetPredPoint() const
{
return m_pred_point;
}
/ filter type id
EStatsPredType
GetPredStatsType() const override
{
return CStatsPred::EsptPoint;
}
/ conversion function
static CStatsPredPoint *
ConvertPredStats(CStatsPred *pred_stats)
{
GPOS_ASSERT(nullptr != pred_stats);
GPOS_ASSERT(CStatsPred::EsptPoint == pred_stats->GetPredStatsType());
return dynamic_cast<CStatsPredPoint *>(pred_stats);
}
}; / class CStatsPredPoint
} / namespace gpnaucrates
#endif / !GPNAUCRATES_CStatsPredPoint_H
/ EOF
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