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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