greenplumn CParseHandlerCostParams 源码
greenplumn CParseHandlerCostParams 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/parser/CParseHandlerCostParams.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2013 EMC Corp.
//
// @filename:
// CParseHandlerCostParams.h
//
// @doc:
// Parse handler for cost model paerameters
//---------------------------------------------------------------------------
#ifndef GPDXL_CParseHandlerCostParams_H
#define GPDXL_CParseHandlerCostParams_H
#include "gpos/base.h"
#include "gpopt/cost/ICostModelParams.h"
#include "naucrates/dxl/parser/CParseHandlerBase.h"
namespace gpdxl
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CParseHandlerCostParams
//
// @doc:
// Parse handler for cost model parameters
//
//---------------------------------------------------------------------------
class CParseHandlerCostParams : public CParseHandlerBase
{
private:
// cost params
ICostModelParams *m_cost_model_params;
// process the start of an element
void StartElement(
const XMLCh *const element_uri, // URI of element's namespace
const XMLCh *const element_local_name, // local part of element's name
const XMLCh *const element_qname, // element's qname
const Attributes &attr // element's attributes
) override;
// process the end of an element
void EndElement(
const XMLCh *const element_uri, // URI of element's namespace
const XMLCh *const element_local_name, // local part of element's name
const XMLCh *const element_qname // element's qname
) override;
public:
// private ctor
CParseHandlerCostParams(const CParseHandlerCostParams &) = delete;
// ctor/dtor
CParseHandlerCostParams(CMemoryPool *mp,
CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root);
~CParseHandlerCostParams() override;
// returns the dxl representation of cost parameters
ICostModelParams *
GetCostModelParams()
{
return m_cost_model_params;
}
EDxlParseHandlerType
GetParseHandlerType() const override
{
return EdxlphCostParams;
}
};
} // namespace gpdxl
#endif // !GPDXL_CParseHandlerCostParams_H
// EOF
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