greenplumn CXformAntiSemiJoinAntiSemiJoinSwap 源码

  • 2022-08-18
  • 浏览 (11)

greenplumn CXformAntiSemiJoinAntiSemiJoinSwap 代码

文件路径:/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformAntiSemiJoinAntiSemiJoinSwap.h

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2012 EMC Corp.
//
//	@filename:
//		CXformAntiSemiJoinAntiSemiJoinSwap.h
//
//	@doc:
//		Swap two cascaded anti semi-joins
//---------------------------------------------------------------------------
#ifndef GPOPT_CXformAntiSemiJoinAntiSemiJoinSwap_H
#define GPOPT_CXformAntiSemiJoinAntiSemiJoinSwap_H

#include "gpos/base.h"

#include "gpopt/operators/CLogicalLeftAntiSemiJoin.h"
#include "gpopt/xforms/CXformJoinSwap.h"

namespace gpopt
{
using namespace gpos;

//---------------------------------------------------------------------------
//	@class:
//		CXformAntiSemiJoinAntiSemiJoinSwap
//
//	@doc:
//		Swap two cascaded anti semi-joins
//
//---------------------------------------------------------------------------
class CXformAntiSemiJoinAntiSemiJoinSwap
	: public CXformJoinSwap<CLogicalLeftAntiSemiJoin, CLogicalLeftAntiSemiJoin>
{
private:
public:
	CXformAntiSemiJoinAntiSemiJoinSwap(
		const CXformAntiSemiJoinAntiSemiJoinSwap &) = delete;

	// ctor
	explicit CXformAntiSemiJoinAntiSemiJoinSwap(CMemoryPool *mp)
		: CXformJoinSwap<CLogicalLeftAntiSemiJoin, CLogicalLeftAntiSemiJoin>(mp)
	{
	}

	// dtor
	~CXformAntiSemiJoinAntiSemiJoinSwap() override = default;

	// Compatibility function
	BOOL
	FCompatible(CXform::EXformId exfid) override
	{
		return ExfAntiSemiJoinAntiSemiJoinSwap != exfid;
	}

	// ident accessors
	EXformId
	Exfid() const override
	{
		return ExfAntiSemiJoinAntiSemiJoinSwap;
	}

	const CHAR *
	SzId() const override
	{
		return "CXformAntiSemiJoinAntiSemiJoinSwap";
	}

};	// class CXformAntiSemiJoinAntiSemiJoinSwap

}  // namespace gpopt

#endif	// !GPOPT_CXformSemiJoinSemiJoinSwap_H

// EOF

相关信息

greenplumn 源码目录

相关文章

greenplumn CDecorrelator 源码

greenplumn CJoinOrder 源码

greenplumn CJoinOrderDP 源码

greenplumn CJoinOrderDPv2 源码

greenplumn CJoinOrderGreedy 源码

greenplumn CJoinOrderMinCard 源码

greenplumn CSubqueryHandler 源码

greenplumn CXform 源码

greenplumn CXformAntiSemiJoinAntiSemiJoinNotInSwap 源码

greenplumn CXformAntiSemiJoinInnerJoinSwap 源码

0  赞