greenplumn CDXLDatumInt8 源码
greenplumn CDXLDatumInt8 代码
文件路径：/src/backend/gporca/libnaucrates/src/operators/CDXLDatumInt8.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CDXLDatumInt8.cpp
//
// @doc:
// Implementation of DXL datum of type long int
//
// @owner:
//
//
// @test:
//
//---------------------------------------------------------------------------
#include "naucrates/dxl/operators/CDXLDatumInt8.h"
#include "gpos/string/CWStringDynamic.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
using namespace gpos;
using namespace gpdxl;
//---------------------------------------------------------------------------
// @function:
// CDXLDatumInt8::CDXLDatumInt8
//
// @doc:
// Ctor
//
//---------------------------------------------------------------------------
CDXLDatumInt8::CDXLDatumInt8(CMemoryPool *mp, IMDId *mdid_type, BOOL is_null,
LINT val)
: CDXLDatum(mp, mdid_type, default_type_modifier, is_null, 8 /*length*/),
m_val(val)
{
if (is_null)
{
m_val = 0;
}
}
//---------------------------------------------------------------------------
// @function:
// CDXLDatumInt8::Value
//
// @doc:
// Return the long int value
//
//---------------------------------------------------------------------------
LINT
CDXLDatumInt8::Value() const
{
return m_val;
}
//---------------------------------------------------------------------------
// @function:
// CDXLDatumInt8::Serialize
//
// @doc:
// Serialize datum in DXL format
//
//---------------------------------------------------------------------------
void
CDXLDatumInt8::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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