greenplumn CParseHandlerSearchStrategy 代码
文件路径：/src/backend/gporca/libnaucrates/src/parser/CParseHandlerSearchStrategy.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CParseHandlerSearchStrategy.cpp
/
/ @doc:
/ Implementation of the SAX parse handler class for parsing search strategy.
/
/---------------------------------------------------------------------------
#include "naucrates/dxl/parser/CParseHandlerSearchStrategy.h"
#include "naucrates/dxl/parser/CParseHandlerFactory.h"
#include "naucrates/dxl/parser/CParseHandlerManager.h"
#include "naucrates/dxl/parser/CParseHandlerSearchStage.h"
using namespace gpdxl;
using namespace gpopt;
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerSearchStrategy::CParseHandlerSearchStrategy
/
/ @doc:
/ Ctor
/
/---------------------------------------------------------------------------
CParseHandlerSearchStrategy::CParseHandlerSearchStrategy(
CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root)
: CParseHandlerBase(mp, parse_handler_mgr, parse_handler_root),
m_search_stage_array(nullptr)
{
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerSearchStrategy::~CParseHandlerSearchStrategy
/
/ @doc:
/ Dtor
/
/---------------------------------------------------------------------------
CParseHandlerSearchStrategy::~CParseHandlerSearchStrategy()
{
CRefCount::SafeRelease(m_search_stage_array);
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerSearchStrategy::StartElement
/
/ @doc:
/ Invoked by Xerces to process an opening tag
/
/---------------------------------------------------------------------------
void
CParseHandlerSearchStrategy::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(EdxltokenSearchStrategy),
element_local_name))
{
m_search_stage_array = GPOS_NEW(m_mp) CSearchStageArray(m_mp);
}
else if (0 == XMLString::compareString(
CDXLTokens::XmlstrToken(EdxltokenSearchStage),
element_local_name))
{
GPOS_ASSERT(nullptr != m_search_stage_array);
/ start new search stage
CParseHandlerBase *search_stage_parse_handler =
CParseHandlerFactory::GetParseHandler(
m_mp, CDXLTokens::XmlstrToken(EdxltokenSearchStage),
m_parse_handler_mgr, this);
m_parse_handler_mgr->ActivateParseHandler(search_stage_parse_handler);
/ store parse handler
this->Append(search_stage_parse_handler);
search_stage_parse_handler->startElement(
element_uri, element_local_name, element_qname, attrs);
}
else
{
CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
str->GetBuffer());
}
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerSearchStrategy::EndElement
/
/ @doc:
/ Invoked by Xerces to process a closing tag
/
/---------------------------------------------------------------------------
void
CParseHandlerSearchStrategy::EndElement(const XMLCh *const, / element_uri,
const XMLCh *const element_local_name,
const XMLCh *const / element_qname
)
{
if (0 != XMLString::compareString(
CDXLTokens::XmlstrToken(EdxltokenSearchStrategy),
element_local_name))
{
CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
str->GetBuffer());
}
const ULONG size = this->Length();
for (ULONG idx = 0; idx < size; idx++)
{
CParseHandlerSearchStage *search_stage_parse_handler =
dynamic_cast<CParseHandlerSearchStage *>((*this)[idx]);
CXformSet *xform_set = search_stage_parse_handler->GetXformSet();
xform_set->AddRef();
CSearchStage *search_stage = GPOS_NEW(m_mp)
CSearchStage(xform_set, search_stage_parse_handler->TimeThreshold(),
search_stage_parse_handler->CostThreshold());
m_search_stage_array->Append(search_stage);
}
/ deactivate handler
m_parse_handler_mgr->DeactivateHandler();
}
/ EOF
相关信息
相关文章
greenplumn CParseHandlerAgg 源码
greenplumn CParseHandlerAppend 源码
greenplumn CParseHandlerArray 源码
greenplumn CParseHandlerAssert 源码
greenplumn CParseHandlerBase 源码
greenplumn CParseHandlerBroadcastMotion 源码
greenplumn CParseHandlerCTEConfig 源码
greenplumn CParseHandlerCTEList 源码