greenplumn CStatsPredUnsupported 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/statistics/CStatsPredUnsupported.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2014 VMware, Inc. or its affiliates.
/
/ @filename:
/ CStatsPredUnsupported.h
/
/ @doc:
/ Class representing unsupported statistics filter
/---------------------------------------------------------------------------
#ifndef GPNAUCRATES_CStatsPredUnsupported_H
#define GPNAUCRATES_CStatsPredUnsupported_H
#include "gpos/base.h"
#include "gpos/common/CDouble.h"
#include "naucrates/statistics/CStatsPred.h"
namespace gpnaucrates
{
using namespace gpos;
/---------------------------------------------------------------------------
/ @class:
/ CStatsPredUnsupported
/
/ @doc:
/ Class representing unsupported statistics filter
/---------------------------------------------------------------------------
class CStatsPredUnsupported : public CStatsPred
{
private:
/ predicate comparison type
CStatsPred::EStatsCmpType m_stats_cmp_type;
/ scale factor of the predicate
CDouble m_default_scale_factor;
/ initialize the scale factor of the predicate
static CDouble InitScaleFactor();
public:
CStatsPredUnsupported(const CStatsPredUnsupported &) = delete;
/ ctors
CStatsPredUnsupported(ULONG colid,
CStatsPred::EStatsCmpType stats_pred_type);
CStatsPredUnsupported(ULONG colid,
CStatsPred::EStatsCmpType stats_pred_type,
CDouble default_scale_factor);
/ filter type id
CStatsPred::EStatsPredType
GetPredStatsType() const override
{
return CStatsPred::EsptUnsupported;
}
/ comparison types for stats computation
virtual CStatsPred::EStatsCmpType
GetStatsCmpType() const
{
return m_stats_cmp_type;
}
CDouble
ScaleFactor() const
{
return m_default_scale_factor;
}
/ conversion function
static CStatsPredUnsupported *
ConvertPredStats(CStatsPred *pred_stats)
{
GPOS_ASSERT(nullptr != pred_stats);
GPOS_ASSERT(CStatsPred::EsptUnsupported ==
pred_stats->GetPredStatsType());
return dynamic_cast<CStatsPredUnsupported *>(pred_stats);
}
}; / class CStatsPredUnsupported
} / namespace gpnaucrates
#endif / !GPNAUCRATES_CStatsPredUnsupported_H
/ EOF
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