greenplumn CDXLDatumInt8 源码
greenplumn CDXLDatumInt8 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLDatumInt8.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CDXLDatumInt8.h
//
// @doc:
// Class for representing DXL datums of type long int
//
// @owner:
//
//
// @test:
//
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLDatumInt8_H
#define GPDXL_CDXLDatumInt8_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLDatum.h"
namespace gpdxl
{
using namespace gpos;
// fwd decl
class CXMLSerializer;
//---------------------------------------------------------------------------
// @class:
// CDXLDatumInt8
//
// @doc:
// Class for representing DXL datums of type long int
//
//---------------------------------------------------------------------------
class CDXLDatumInt8 : public CDXLDatum
{
private:
// long int value
LINT m_val;
public:
CDXLDatumInt8(const CDXLDatumInt8 &) = delete;
// ctor
CDXLDatumInt8(CMemoryPool *mp, IMDId *mdid_type, BOOL is_null, LINT val);
// dtor
~CDXLDatumInt8() override = default;
// accessor of value
LINT Value() const;
// serialize the datum as the given element
void Serialize(CXMLSerializer *xml_serializer) override;
// datum type
EdxldatumType
GetDatumType() const override
{
return CDXLDatum::EdxldatumInt8;
}
// conversion function
static CDXLDatumInt8 *
Cast(CDXLDatum *dxl_datum)
{
GPOS_ASSERT(nullptr != dxl_datum);
GPOS_ASSERT(CDXLDatum::EdxldatumInt8 == dxl_datum->GetDatumType());
return dynamic_cast<CDXLDatumInt8 *>(dxl_datum);
}
};
} // namespace gpdxl
#endif // !GPDXL_CDXLDatumInt8_H
// EOF
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