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