greenplumn CDXLProperties 源码
greenplumn CDXLProperties 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLProperties.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CDXLProperties.h
//
// @doc:
// Representation of properties of a DXL operator node such as stats
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLProperties_H
#define GPDXL_CDXLProperties_H
#include "gpos/base.h"
#include "naucrates/md/CDXLStatsDerivedRelation.h"
namespace gpdxl
{
using namespace gpos;
using namespace gpmd;
enum Edxlproperty
{
EdxlpropertyLogical,
EdxlpropertyPhysical,
EdxlpropertySentinel
};
//---------------------------------------------------------------------------
// @class:
// CDXLProperties
//
// @doc:
// Container for the properties of an operator node, such as stats
//
//---------------------------------------------------------------------------
class CDXLProperties : public CRefCount
{
private:
// derived statistics
CDXLStatsDerivedRelation *m_dxl_stats_derived_relation{nullptr};
protected:
// serialize statistics in DXL format
void SerializeStatsToDXL(CXMLSerializer *xml_serializer) const;
public:
CDXLProperties(const CDXLProperties &) = delete;
// ctor
explicit CDXLProperties();
//dtor
~CDXLProperties() override;
// setter
virtual void SetStats(CDXLStatsDerivedRelation *dxl_stats_derived_relation);
// statistical information
virtual const CDXLStatsDerivedRelation *GetDxlStatsDrvdRelation() const;
virtual Edxlproperty
GetDXLPropertyType() const
{
return EdxlpropertyLogical;
}
// serialize properties in DXL format
virtual void SerializePropertiesToDXL(CXMLSerializer *xml_serializer) const;
};
} // namespace gpdxl
#endif // !GPDXL_CDXLProperties_H
// EOF
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