greenplumn CParseHandlerSearchStrategy 源码
greenplumn CParseHandlerSearchStrategy 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/parser/CParseHandlerSearchStrategy.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CParseHandlerSearchStrategy.h
//
// @doc:
// Parse handler for search strategy
//---------------------------------------------------------------------------
#ifndef GPDXL_CParseHandlerSearchStrategy_H
#define GPDXL_CParseHandlerSearchStrategy_H
#include "gpos/base.h"
#include "gpopt/search/CSearchStage.h"
#include "naucrates/dxl/parser/CParseHandlerBase.h"
namespace gpdxl
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CParseHandlerSearchStrategy
//
// @doc:
// Parse handler for search strategy
//
//---------------------------------------------------------------------------
class CParseHandlerSearchStrategy : public CParseHandlerBase
{
private:
// search stages
CSearchStageArray *m_search_stage_array;
// 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
CParseHandlerSearchStrategy(const CParseHandlerSearchStrategy &) = delete;
// ctor/dtor
CParseHandlerSearchStrategy(CMemoryPool *mp,
CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root);
~CParseHandlerSearchStrategy() override;
// returns the dxl representation of search stages
CSearchStageArray *
GetSearchStageArray()
{
return m_search_stage_array;
}
EDxlParseHandlerType
GetParseHandlerType() const override
{
return EdxlphSearchStrategy;
}
};
} // namespace gpdxl
#endif // !GPDXL_CParseHandlerSearchStrategy_H
// EOF
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