greenplumn CParseHandlerWindowOids 代码
文件路径：/src/backend/gporca/libnaucrates/src/parser/CParseHandlerWindowOids.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2017 VMware, Inc. or its affiliates.
/
/ @filename:
/ CParseHandlerWindowOids.cpp
/
/ @doc:
/ Implementation of the SAX parse handler class for parsing window oids
/---------------------------------------------------------------------------
#include "naucrates/dxl/parser/CParseHandlerWindowOids.h"
#include "naucrates/dxl/operators/CDXLOperatorFactory.h"
#include "naucrates/dxl/parser/CParseHandlerFactory.h"
#include "naucrates/dxl/parser/CParseHandlerManager.h"
#include "naucrates/dxl/xml/dxltokens.h"
using namespace gpdxl;
using namespace gpopt;
XERCES_CPP_NAMESPACE_USE
CParseHandlerWindowOids::CParseHandlerWindowOids(
CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root)
: CParseHandlerBase(mp, parse_handler_mgr, parse_handler_root),
m_window_oids(nullptr)
{
}
CParseHandlerWindowOids::~CParseHandlerWindowOids()
{
CRefCount::SafeRelease(m_window_oids);
}
void
CParseHandlerWindowOids::StartElement(const XMLCh *const, /element_uri,
const XMLCh *const element_local_name,
const XMLCh *const, /element_qname,
const Attributes &attrs)
{
if (0 !=
XMLString::compareString(CDXLTokens::XmlstrToken(EdxltokenWindowOids),
element_local_name))
{
CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
str->GetBuffer());
}
/ parse window function oids
OID row_number_oid = CDXLOperatorFactory::ExtractConvertAttrValueToOid(
m_parse_handler_mgr->GetDXLMemoryManager(), attrs,
EdxltokenOidRowNumber, EdxltokenWindowOids);
OID rank_oid = CDXLOperatorFactory::ExtractConvertAttrValueToOid(
m_parse_handler_mgr->GetDXLMemoryManager(), attrs, EdxltokenOidRank,
EdxltokenWindowOids);
m_window_oids = GPOS_NEW(m_mp) CWindowOids(row_number_oid, rank_oid);
}
/ invoked by Xerces to process a closing tag
void
CParseHandlerWindowOids::EndElement(const XMLCh *const, / element_uri,
const XMLCh *const element_local_name,
const XMLCh *const / element_qname
)
{
if (0 !=
XMLString::compareString(CDXLTokens::XmlstrToken(EdxltokenWindowOids),
element_local_name))
{
CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
str->GetBuffer());
}
GPOS_ASSERT(nullptr != m_window_oids);
GPOS_ASSERT(0 == this->Length());
/ deactivate handler
m_parse_handler_mgr->DeactivateHandler();
}
/ return the type of the parse handler.
EDxlParseHandlerType
CParseHandlerWindowOids::GetParseHandlerType() const
{
return EdxlphWindowOids;
}
CWindowOids *
CParseHandlerWindowOids::GetWindowOids() const
{
return m_window_oids;
}
/ EOF
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