greenplumn CDXLDatumInt4 源码
greenplumn CDXLDatumInt4 代码
文件路径：/src/backend/gporca/libnaucrates/src/operators/CDXLDatumInt4.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CDXLDatumInt4.cpp
//
// @doc:
// Implementation of DXL datum of type integer
//
// @owner:
//
//
// @test:
//
//---------------------------------------------------------------------------
#include "naucrates/dxl/operators/CDXLDatumInt4.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
using namespace gpos;
using namespace gpdxl;
//---------------------------------------------------------------------------
// @function:
// CDXLDatumInt4::CDXLDatumInt4
//
// @doc:
// Ctor
//
//---------------------------------------------------------------------------
CDXLDatumInt4::CDXLDatumInt4(CMemoryPool *mp, IMDId *mdid_type, BOOL is_null,
INT val)
: CDXLDatum(mp, mdid_type, default_type_modifier, is_null, 4 /*length*/),
m_val(val)
{
}
//---------------------------------------------------------------------------
// @function:
// CDXLDatumInt4::Value
//
// @doc:
// Return the integer value
//
//---------------------------------------------------------------------------
INT
CDXLDatumInt4::Value() const
{
return m_val;
}
//---------------------------------------------------------------------------
// @function:
// CDXLDatumInt4::Serialize
//
// @doc:
// Serialize datum in DXL format
//
//---------------------------------------------------------------------------
void
CDXLDatumInt4::Serialize(CXMLSerializer *xml_serializer)
{
m_mdid_type->Serialize(xml_serializer,
CDXLTokens::GetDXLTokenStr(EdxltokenTypeId));
if (!m_is_null)
{
xml_serializer->AddAttribute(CDXLTokens::GetDXLTokenStr(EdxltokenValue),
m_val);
}
else
{
xml_serializer->AddAttribute(
CDXLTokens::GetDXLTokenStr(EdxltokenIsNull), true);
}
}
// EOF
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