greenplumn CParseHandlerStatistics 源码
greenplumn CParseHandlerStatistics 代码
文件路径:/src/backend/gporca/libnaucrates/src/parser/CParseHandlerStatistics.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CParseHandlerStatistics.cpp
//
// @doc:
// Implementation of the SAX parse handler class for parsing a DXL document
//---------------------------------------------------------------------------
#include "naucrates/dxl/parser/CParseHandlerStatistics.h"
#include "naucrates/dxl/operators/CDXLOperatorFactory.h"
#include "naucrates/dxl/parser/CParseHandlerFactory.h"
#include "naucrates/dxl/parser/CParseHandlerManager.h"
#include "naucrates/dxl/parser/CParseHandlerStatsDerivedRelation.h"
using namespace gpdxl;
XERCES_CPP_NAMESPACE_USE
//---------------------------------------------------------------------------
// @function:
// CParseHandlerStatistics::CParseHandlerStatistics
//
// @doc:
// Ctor
//
//---------------------------------------------------------------------------
CParseHandlerStatistics::CParseHandlerStatistics(
CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root)
: CParseHandlerBase(mp, parse_handler_mgr, parse_handler_root),
m_dxl_stats_derived_rel_array(nullptr)
{
}
//---------------------------------------------------------------------------
// @function:
// CParseHandlerStatistics::~CParseHandlerStatistics
//
// @doc:
// Dtor
//
//---------------------------------------------------------------------------
CParseHandlerStatistics::~CParseHandlerStatistics()
{
CRefCount::SafeRelease(m_dxl_stats_derived_rel_array);
}
//---------------------------------------------------------------------------
// @function:
// CParseHandlerStatistics::GetParseHandlerType
//
// @doc:
// Return the type of the parse handler. Currently we overload this method to
// return a specific type for the plann, query and metadata parse handlers.
//
//---------------------------------------------------------------------------
EDxlParseHandlerType
CParseHandlerStatistics::GetParseHandlerType() const
{
return EdxlphStatistics;
}
//---------------------------------------------------------------------------
// @function:
// CParseHandlerStatistics::GetStatsDerivedRelDXLArray
//
// @doc:
// Returns the list of statistics objects constructed by the parser
//
//---------------------------------------------------------------------------
CDXLStatsDerivedRelationArray *
CParseHandlerStatistics::GetStatsDerivedRelDXLArray() const
{
return m_dxl_stats_derived_rel_array;
}
//---------------------------------------------------------------------------
// @function:
// CParseHandlerStatistics::StartElement
//
// @doc:
// Invoked by Xerces to process an opening tag
//
//---------------------------------------------------------------------------
void
CParseHandlerStatistics::StartElement(const XMLCh *const element_uri,
const XMLCh *const element_local_name,
const XMLCh *const element_qname,
const Attributes &attrs)
{
if (0 ==
XMLString::compareString(element_local_name,
CDXLTokens::XmlstrToken(EdxltokenStatistics)))
{
// start of the statistics section in the DXL document
GPOS_ASSERT(nullptr == m_dxl_stats_derived_rel_array);
m_dxl_stats_derived_rel_array =
GPOS_NEW(m_mp) CDXLStatsDerivedRelationArray(m_mp);
}
else
{
// currently we only have derived relation statistics objects
GPOS_ASSERT(nullptr != m_dxl_stats_derived_rel_array);
// install a parse handler for the given element
CParseHandlerBase *parse_handler_base =
CParseHandlerFactory::GetParseHandler(m_mp, element_local_name,
m_parse_handler_mgr, this);
m_parse_handler_mgr->ActivateParseHandler(parse_handler_base);
// store parse handler
this->Append(parse_handler_base);
parse_handler_base->startElement(element_uri, element_local_name,
element_qname, attrs);
}
}
//---------------------------------------------------------------------------
// @function:
// CParseHandlerStatistics::EndElement
//
// @doc:
// Invoked by Xerces to process a closing tag
//
//---------------------------------------------------------------------------
void
CParseHandlerStatistics::EndElement(const XMLCh *const, // element_uri,
const XMLCh *const element_local_name,
const XMLCh *const // element_qname
)
{
if (0 !=
XMLString::compareString(element_local_name,
CDXLTokens::XmlstrToken(EdxltokenStatistics)))
{
CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
str->GetBuffer());
}
GPOS_ASSERT(nullptr != m_dxl_stats_derived_rel_array);
const ULONG num_of_stats = this->Length();
for (ULONG idx = 0; idx < num_of_stats; idx++)
{
CParseHandlerStatsDerivedRelation *stats_derived_rel_parse_handler =
dynamic_cast<CParseHandlerStatsDerivedRelation *>((*this)[idx]);
CDXLStatsDerivedRelation *dxl_stats_derived_relation =
stats_derived_rel_parse_handler->GetDxlStatsDrvdRelation();
dxl_stats_derived_relation->AddRef();
m_dxl_stats_derived_rel_array->Append(dxl_stats_derived_relation);
}
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
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
7、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦