greenplumn CDXLDatumInt4 源码
greenplumn CDXLDatumInt4 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLDatumInt4.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CDXLDatumInt4.h
//
// @doc:
// Class for representing DXL integer datum
//
// @owner:
//
//
// @test:
//
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLDatumInt4_H
#define GPDXL_CDXLDatumInt4_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLDatum.h"
namespace gpdxl
{
using namespace gpos;
// fwd decl
class CXMLSerializer;
//---------------------------------------------------------------------------
// @class:
// CDXLDatumInt4
//
// @doc:
// Class for representing DXL integer datums
//
//---------------------------------------------------------------------------
class CDXLDatumInt4 : public CDXLDatum
{
private:
// int4 value
INT m_val;
public:
CDXLDatumInt4(const CDXLDatumInt4 &) = delete;
// ctor
CDXLDatumInt4(CMemoryPool *mp, IMDId *mdid_type, BOOL is_null, INT val);
// dtor
~CDXLDatumInt4() override = default;
// accessor of int value
INT Value() const;
// serialize the datum as the given element
void Serialize(CXMLSerializer *xml_serializer) override;
// datum type
EdxldatumType
GetDatumType() const override
{
return CDXLDatum::EdxldatumInt4;
}
// conversion function
static CDXLDatumInt4 *
Cast(CDXLDatum *dxl_datum)
{
GPOS_ASSERT(nullptr != dxl_datum);
GPOS_ASSERT(CDXLDatum::EdxldatumInt4 == dxl_datum->GetDatumType());
return dynamic_cast<CDXLDatumInt4 *>(dxl_datum);
}
};
} // namespace gpdxl
#endif // !GPDXL_CDXLDatumInt4_H
// EOF
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