greenplumn CDXLIndexDescr 代码
文件路径：/src/backend/gporca/libnaucrates/src/operators/CDXLIndexDescr.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CDXLIndexDescr.cpp
/
/ @doc:
/ Implementation of DXL index descriptors
/---------------------------------------------------------------------------
#include "naucrates/dxl/operators/CDXLIndexDescr.h"
#include "gpos/string/CWStringDynamic.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
using namespace gpos;
using namespace gpdxl;
/---------------------------------------------------------------------------
/ @function:
/ CDXLIndexDescr::CDXLIndexDescr
/
/ @doc:
/ Constructor
/
/---------------------------------------------------------------------------
CDXLIndexDescr::CDXLIndexDescr(IMDId *mdid, CMDName *mdname)
: m_mdid(mdid), m_mdname(mdname)
{
GPOS_ASSERT(m_mdid->IsValid());
GPOS_ASSERT(nullptr != m_mdname);
GPOS_ASSERT(m_mdname->GetMDName()->IsValid());
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLIndexDescr::~CDXLIndexDescr
/
/ @doc:
/ Destructor
/
/---------------------------------------------------------------------------
CDXLIndexDescr::~CDXLIndexDescr()
{
m_mdid->Release();
GPOS_DELETE(m_mdname);
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLIndexDescr::MDId
/
/ @doc:
/ Return the metadata id for the index
/
/---------------------------------------------------------------------------
IMDId *
CDXLIndexDescr::MDId() const
{
return m_mdid;
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLIndexDescr::MdName
/
/ @doc:
/ Return index name
/
/---------------------------------------------------------------------------
const CMDName *
CDXLIndexDescr::MdName() const
{
return m_mdname;
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLIndexDescr::SerializeToDXL
/
/ @doc:
/ Serialize index descriptor in DXL format
/
/---------------------------------------------------------------------------
void
CDXLIndexDescr::SerializeToDXL(CXMLSerializer *xml_serializer) const
{
xml_serializer->OpenElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix),
CDXLTokens::GetDXLTokenStr(EdxltokenIndexDescr));
m_mdid->Serialize(xml_serializer,
CDXLTokens::GetDXLTokenStr(EdxltokenMdid));
xml_serializer->AddAttribute(CDXLTokens::GetDXLTokenStr(EdxltokenIndexName),
m_mdname->GetMDName());
xml_serializer->CloseElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix),
CDXLTokens::GetDXLTokenStr(EdxltokenIndexDescr));
}
/ EOF
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