greenplumn CParseHandlerScalarSubPlanParamList 代码
文件路径：/src/backend/gporca/libnaucrates/src/parser/CParseHandlerScalarSubPlanParamList.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CParseHandlerScalarSubPlanParamList.cpp
/
/ @doc:
/
/ Implementation of the SAX parse handler class for parsing the ParamList
/ of a scalar SubPlan
/---------------------------------------------------------------------------
#include "naucrates/dxl/parser/CParseHandlerScalarSubPlanParamList.h"
#include "naucrates/dxl/CDXLUtils.h"
#include "naucrates/dxl/operators/CDXLOperatorFactory.h"
#include "naucrates/dxl/parser/CParseHandlerFactory.h"
#include "naucrates/dxl/parser/CParseHandlerScalarOp.h"
#include "naucrates/dxl/parser/CParseHandlerScalarSubPlanParam.h"
using namespace gpdxl;
XERCES_CPP_NAMESPACE_USE
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerScalarSubPlanParamList::CParseHandlerScalarSubPlanParamList
/
/ @doc:
/ Ctor
/
/---------------------------------------------------------------------------
CParseHandlerScalarSubPlanParamList::CParseHandlerScalarSubPlanParamList(
CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root)
: CParseHandlerScalarOp(mp, parse_handler_mgr, parse_handler_root)
{
m_dxl_colref_array = GPOS_NEW(mp) CDXLColRefArray(mp);
m_has_param_list = false;
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerScalarSubPlanParamList::~CParseHandlerScalarSubPlanParamList
/
/ @doc:
/ Dtor
/
/---------------------------------------------------------------------------
CParseHandlerScalarSubPlanParamList::~CParseHandlerScalarSubPlanParamList()
{
m_dxl_colref_array->Release();
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerScalarSubPlanParamList::StartElement
/
/ @doc:
/ Processes a Xerces start element event
/
/---------------------------------------------------------------------------
void
CParseHandlerScalarSubPlanParamList::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(EdxltokenScalarSubPlanParamList),
element_local_name))
{
/ we can't have seen a paramlist already
GPOS_ASSERT(!m_has_param_list);
/ start the paramlist
m_has_param_list = true;
}
else if (0 == XMLString::compareString(
CDXLTokens::XmlstrToken(EdxltokenScalarSubPlanParam),
element_local_name))
{
/ we must have seen a paramlist already
GPOS_ASSERT(m_has_param_list);
/ start new param
CParseHandlerBase *parse_handler_subplan_param =
CParseHandlerFactory::GetParseHandler(
m_mp, CDXLTokens::XmlstrToken(EdxltokenScalarSubPlanParam),
m_parse_handler_mgr, this);
m_parse_handler_mgr->ActivateParseHandler(parse_handler_subplan_param);
/ store parse handler
this->Append(parse_handler_subplan_param);
parse_handler_subplan_param->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:
/ CParseHandlerScalarSubPlanParamList::EndElement
/
/ @doc:
/ Processes a Xerces end element event
/
/---------------------------------------------------------------------------
void
CParseHandlerScalarSubPlanParamList::EndElement(
const XMLCh *const, / element_uri,
const XMLCh *const element_local_name,
const XMLCh *const / element_qname
)
{
if (0 != XMLString::compareString(
CDXLTokens::XmlstrToken(EdxltokenScalarSubPlanParamList),
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());
}
const ULONG arity = this->Length();
/ add constructed children from child parse handlers
for (ULONG ul = 0; ul < arity; ul++)
{
CParseHandlerScalarSubPlanParam *parse_handler_subplan_param =
dynamic_cast<CParseHandlerScalarSubPlanParam *>((*this)[ul]);
CDXLColRef *dxl_colref = parse_handler_subplan_param->MakeDXLColRef();
dxl_colref->AddRef();
m_dxl_colref_array->Append(dxl_colref);
}
/ deactivate handler
m_parse_handler_mgr->DeactivateHandler();
}
/ EOF
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