greenplumn CDXLDatumGeneric 代码
文件路径：/src/backend/gporca/libnaucrates/src/operators/CDXLDatumGeneric.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CDXLDatumGeneric.cpp
/
/ @doc:
/ Implementation of DXL datum of type generic
/
/ @owner:
/
/
/ @test:
/
/---------------------------------------------------------------------------
#include "naucrates/dxl/operators/CDXLDatumGeneric.h"
#include "naucrates/dxl/CDXLUtils.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
using namespace gpos;
using namespace gpdxl;
/---------------------------------------------------------------------------
/ @function:
/ CDXLDatumGeneric::CDXLDatumGeneric
/
/ @doc:
/ Ctor
/
/---------------------------------------------------------------------------
CDXLDatumGeneric::CDXLDatumGeneric(CMemoryPool *mp, IMDId *mdid_type,
INT type_modifier, BOOL is_null,
BYTE *byte_array, ULONG length)
: CDXLDatum(mp, mdid_type, type_modifier, is_null, length),
m_byte_array(byte_array)
{
GPOS_ASSERT_IMP(m_is_null, (m_byte_array == nullptr) && (m_length == 0));
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLDatumGeneric::~CDXLDatumGeneric
/
/ @doc:
/ Dtor
/
/---------------------------------------------------------------------------
CDXLDatumGeneric::~CDXLDatumGeneric()
{
GPOS_DELETE_ARRAY(m_byte_array);
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLDatumGeneric::GetByteArray
/
/ @doc:
/ Returns the bytearray of the datum
/
/---------------------------------------------------------------------------
const BYTE *
CDXLDatumGeneric::GetByteArray() const
{
return m_byte_array;
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLDatumGeneric::Serialize
/
/ @doc:
/ Serialize datum in DXL format
/
/---------------------------------------------------------------------------
void
CDXLDatumGeneric::Serialize(CXMLSerializer *xml_serializer)
{
m_mdid_type->Serialize(xml_serializer,
CDXLTokens::GetDXLTokenStr(EdxltokenTypeId));
if (default_type_modifier != TypeModifier())
{
xml_serializer->AddAttribute(
CDXLTokens::GetDXLTokenStr(EdxltokenTypeMod), m_type_modifier);
}
if (!m_is_null)
{
xml_serializer->AddAttribute(CDXLTokens::GetDXLTokenStr(EdxltokenValue),
m_is_null, GetByteArray(), Length());
}
else
{
xml_serializer->AddAttribute(
CDXLTokens::GetDXLTokenStr(EdxltokenIsNull), true);
}
}
/ EOF