greenplumn IMDCacheObject 代码
文件路径：/src/backend/gporca/libnaucrates/src/md/IMDCacheObject.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2011 EMC Corp.
/
/ @filename:
/ IMDCacheObject.cpp
/
/ @doc:
/ Implementation of common methods for MD cache objects
/---------------------------------------------------------------------------
#include "naucrates/md/IMDCacheObject.h"
#include "gpos/string/CWStringDynamic.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
using namespace gpdxl;
using namespace gpmd;
/---------------------------------------------------------------------------
/ @function:
/ IMDCacheObject::SerializeMDIdAsElem
/
/ @doc:
/ Serialize MD operator info in DXL format
/
/---------------------------------------------------------------------------
void
IMDCacheObject::SerializeMDIdAsElem(CXMLSerializer *xml_serializer,
const CWStringConst *element_name,
const IMDId *mdid) const
{
if (nullptr == mdid)
{
return;
}
xml_serializer->OpenElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
mdid->Serialize(xml_serializer, CDXLTokens::GetDXLTokenStr(EdxltokenMdid));
xml_serializer->CloseElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
}
/---------------------------------------------------------------------------
/ @function:
/ IMDCacheObject::SerializeMDIdList
/
/ @doc:
/ Serialize a list of metadata ids into DXL
/
/---------------------------------------------------------------------------
void
IMDCacheObject::SerializeMDIdList(CXMLSerializer *xml_serializer,
const IMdIdArray *mdid_array,
const CWStringConst *strTokenList,
const CWStringConst *strTokenListItem)
{
/ serialize list of metadata ids
xml_serializer->OpenElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), strTokenList);
const ULONG length = mdid_array->Size();
for (ULONG ul = 0; ul < length; ul++)
{
xml_serializer->OpenElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix),
strTokenListItem);
IMDId *mdid = (*mdid_array)[ul];
mdid->Serialize(xml_serializer,
CDXLTokens::GetDXLTokenStr(EdxltokenMdid));
xml_serializer->CloseElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix),
strTokenListItem);
GPOS_CHECK_ABORT;
}
xml_serializer->CloseElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), strTokenList);
}
/ EOF
相关信息
相关文章
greenplumn CDXLStatsDerivedColumn 源码
greenplumn CDXLStatsDerivedRelation 源码
greenplumn CMDAggregateGPDB 源码
greenplumn CMDArrayCoerceCastGPDB 源码