greenplumn CStatsPredConj 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/statistics/CStatsPredConj.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2013 EMC Corp.
/
/ @filename:
/ CStatsPredConj.h
/
/ @doc:
/ Conjunctive filter on statistics
/---------------------------------------------------------------------------
#ifndef GPNAUCRATES_CStatsPredConj_H
#define GPNAUCRATES_CStatsPredConj_H
#include "gpos/base.h"
#include "naucrates/statistics/CPoint.h"
#include "naucrates/statistics/CStatsPred.h"
namespace gpnaucrates
{
using namespace gpos;
/---------------------------------------------------------------------------
/ @class:
/ CStatsPredConj
/
/ @doc:
/ Conjunctive filter on statistics
/---------------------------------------------------------------------------
class CStatsPredConj : public CStatsPred
{
private:
/ array of filters
CStatsPredPtrArry *m_conj_pred_stats_array;
public:
CStatsPredConj &operator=(CStatsPredConj &) = delete;
CStatsPredConj(const CStatsPredConj &) = delete;
/ ctor
explicit CStatsPredConj(CStatsPredPtrArry *pdrgpstatspred);
/ dtor
~CStatsPredConj() override
{
m_conj_pred_stats_array->Release();
}
/ the column identifier on which the predicates are on
ULONG GetColId() const override;
/ total number of predicates in the conjunction
ULONG
GetNumPreds() const
{
return m_conj_pred_stats_array->Size();
}
CStatsPredPtrArry *
GetConjPredStatsArray() const
{
return m_conj_pred_stats_array;
}
/ sort the components of the conjunction
void Sort() const;
/ return the filter at a particular position
CStatsPred *GetPredStats(ULONG pos) const;
/ filter type id
EStatsPredType
GetPredStatsType() const override
{
return CStatsPred::EsptConj;
}
/ conversion function
static CStatsPredConj *
ConvertPredStats(CStatsPred *pred_stats)
{
GPOS_ASSERT(nullptr != pred_stats);
GPOS_ASSERT(CStatsPred::EsptConj == pred_stats->GetPredStatsType());
return dynamic_cast<CStatsPredConj *>(pred_stats);
}
}; / class CStatsPredConj
} / namespace gpnaucrates
#endif / !GPNAUCRATES_CStatsPredConj_H
/ EOF
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