greenplumn CDXLDatumBool 源码

  • 2022-08-18
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greenplumn CDXLDatumBool 代码

文件路径:/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLDatumBool.h

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2012 EMC Corp.
//
//	@filename:
//		CDXLDatumBool.h
//
//	@doc:
//		Class for representing DXL boolean datum
//
//	@owner:
//
//
//	@test:
//
//---------------------------------------------------------------------------

#ifndef GPDXL_CDXLDatumBool_H
#define GPDXL_CDXLDatumBool_H

#include "gpos/base.h"

#include "naucrates/dxl/operators/CDXLDatum.h"

namespace gpdxl
{
using namespace gpos;

// fwd decl
class CXMLSerializer;

//---------------------------------------------------------------------------
//	@class:
//		CDXLDatumBool
//
//	@doc:
//		Class for representing DXL boolean datums
//
//---------------------------------------------------------------------------
class CDXLDatumBool : public CDXLDatum
{
private:
	// boolean value
	BOOL m_value;

public:
	CDXLDatumBool(const CDXLDatumBool &) = delete;

	// ctor
	CDXLDatumBool(CMemoryPool *mp, IMDId *mdid_type, BOOL is_null, BOOL value);

	// dtor
	~CDXLDatumBool() override = default;

	// serialize the datum as the given element
	void Serialize(CXMLSerializer *xml_serializer) override;

	// datum type
	EdxldatumType
	GetDatumType() const override
	{
		return CDXLDatum::EdxldatumBool;
	}

	// accessor of boolean value
	BOOL
	GetValue() const
	{
		return m_value;
	}

	// conversion function
	static CDXLDatumBool *
	Cast(CDXLDatum *dxl_datum)
	{
		GPOS_ASSERT(nullptr != dxl_datum);
		GPOS_ASSERT(CDXLDatum::CDXLDatum::EdxldatumBool ==
					dxl_datum->GetDatumType());

		return dynamic_cast<CDXLDatumBool *>(dxl_datum);
	}
};
}  // namespace gpdxl

#endif	// !GPDXL_CDXLDatumBool_H

// EOF

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