greenplumn CParseHandlerScalarSubPlanParam 代码
文件路径：/src/backend/gporca/libnaucrates/src/parser/CParseHandlerScalarSubPlanParam.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CParseHandlerScalarSubPlanParam.cpp
/
/ @doc:
/
/ Implementation of the SAX parse handler class for parsing a Param of
/ a scalar SubPlan
/---------------------------------------------------------------------------
#include "naucrates/dxl/parser/CParseHandlerScalarSubPlanParam.h"
#include "naucrates/dxl/CDXLUtils.h"
#include "naucrates/dxl/operators/CDXLOperatorFactory.h"
#include "naucrates/dxl/parser/CParseHandlerFactory.h"
#include "naucrates/dxl/parser/CParseHandlerPhysicalOp.h"
#include "naucrates/dxl/parser/CParseHandlerScalarOp.h"
using namespace gpdxl;
XERCES_CPP_NAMESPACE_USE
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerScalarSubPlanParam::CParseHandlerScalarSubPlanParam
/
/ @doc:
/ Ctor
/
/---------------------------------------------------------------------------
CParseHandlerScalarSubPlanParam::CParseHandlerScalarSubPlanParam(
CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root)
: CParseHandlerScalarOp(mp, parse_handler_mgr, parse_handler_root),
m_dxl_colref(nullptr)
{
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerScalarSubPlanParam::~CParseHandlerScalarSubPlanParam
/
/ @doc:
/ Dtor
/
/---------------------------------------------------------------------------
CParseHandlerScalarSubPlanParam::~CParseHandlerScalarSubPlanParam()
{
m_dxl_colref->Release();
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerScalarSubPlanParam::StartElement
/
/ @doc:
/ Processes a Xerces start element event
/
/---------------------------------------------------------------------------
void
CParseHandlerScalarSubPlanParam::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(EdxltokenScalarSubPlanParam),
element_local_name))
{
CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
str->GetBuffer());
}
m_dxl_colref = CDXLOperatorFactory::MakeDXLColRef(
m_parse_handler_mgr->GetDXLMemoryManager(), attrs,
EdxltokenScalarSubPlanParam);
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerScalarSubPlanParam::EndElement
/
/ @doc:
/ Processes a Xerces end element event
/
/---------------------------------------------------------------------------
void
CParseHandlerScalarSubPlanParam::EndElement(
const XMLCh *const, / element_uri,
const XMLCh *const element_local_name,
const XMLCh *const / element_qname
)
{
if (0 != XMLString::compareString(
CDXLTokens::XmlstrToken(EdxltokenScalarSubPlanParam),
element_local_name) &&
nullptr != m_dxl_node)
{
CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
str->GetBuffer());
}
/ deactivate handler
m_parse_handler_mgr->DeactivateHandler();
}
/ EOF
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