greenplumn CParseHandlerCostParam 源码
greenplumn CParseHandlerCostParam 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/parser/CParseHandlerCostParam.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2013 EMC Corp.
//
// @filename:
// CParseHandlerCostParam.h
//
// @doc:
// SAX parse handler class for parsing cost model param.
//---------------------------------------------------------------------------
#ifndef GPDXL_CParseHandlerCostParam_H
#define GPDXL_CParseHandlerCostParam_H
#include "gpos/base.h"
#include "naucrates/dxl/parser/CParseHandlerBase.h"
namespace gpdxl
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CParseHandlerCostParam
//
// @doc:
// Parse handler for parsing cost model param
//
//---------------------------------------------------------------------------
class CParseHandlerCostParam : public CParseHandlerBase
{
private:
// param name
CHAR *m_param_name;
// param value
CDouble m_value;
// lower bound value
CDouble m_lower_bound_val;
// upper bound value
CDouble m_upper_bound_val;
// 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:
CParseHandlerCostParam(const CParseHandlerCostParam &) = delete;
// ctor
CParseHandlerCostParam(CMemoryPool *mp,
CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root);
// dtor
~CParseHandlerCostParam() override;
// return parsed param name
CHAR *
GetName() const
{
return m_param_name;
}
// return parsed param value
CDouble
Get() const
{
return m_value;
}
// return parsed param lower bound value
CDouble
GetLowerBoundVal() const
{
return m_lower_bound_val;
}
// return parsed param upper bound value
CDouble
GetUpperBoundVal() const
{
return m_upper_bound_val;
}
EDxlParseHandlerType
GetParseHandlerType() const override
{
return EdxlphCostParam;
}
};
} // namespace gpdxl
#endif // !GPDXL_CParseHandlerCostParam_H
// EOF
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