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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