greenplumn CLogicalLeftAntiSemiJoin 源码

  • 2022-08-18
  • 浏览 (464)

greenplumn CLogicalLeftAntiSemiJoin 代码

文件路径:/src/backend/gporca/libgpopt/include/gpopt/operators/CLogicalLeftAntiSemiJoin.h

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2011 EMC Corp.
//
//	@filename:
//		CLogicalLeftAntiSemiJoin.h
//
//	@doc:
//		Left anti semi join operator
//---------------------------------------------------------------------------
#ifndef GPOS_CLogicalLeftAntiSemiJoin_H
#define GPOS_CLogicalLeftAntiSemiJoin_H

#include "gpos/base.h"

#include "gpopt/operators/CLogicalJoin.h"

namespace gpopt
{
//---------------------------------------------------------------------------
//	@class:
//		CLogicalLeftAntiSemiJoin
//
//	@doc:
//		Left anti semi join operator
//
//---------------------------------------------------------------------------
class CLogicalLeftAntiSemiJoin : public CLogicalJoin
{
private:
public:
	CLogicalLeftAntiSemiJoin(const CLogicalLeftAntiSemiJoin &) = delete;

	// ctor
	explicit CLogicalLeftAntiSemiJoin(
		CMemoryPool *mp, CXform::EXformId origin_xform = CXform::ExfSentinel);

	// dtor
	~CLogicalLeftAntiSemiJoin() override = default;

	// ident accessors
	EOperatorId
	Eopid() const override
	{
		return EopLogicalLeftAntiSemiJoin;
	}

	// return a string for operator name
	const CHAR *
	SzId() const override
	{
		return "CLogicalLeftAntiSemiJoin";
	}

	// return true if we can pull projections up past this operator from its given child
	BOOL
	FCanPullProjectionsUp(ULONG child_index) const override
	{
		return (0 == child_index);
	}

	//-------------------------------------------------------------------------------------
	// Derived Relational Properties
	//-------------------------------------------------------------------------------------

	// derive output columns
	CColRefSet *DeriveOutputColumns(CMemoryPool *mp,
									CExpressionHandle &exprhdl) override;

	// derive not nullable output columns
	CColRefSet *
	DeriveNotNullColumns(CMemoryPool *,	 // mp
						 CExpressionHandle &exprhdl) const override
	{
		return PcrsDeriveNotNullPassThruOuter(exprhdl);
	}

	// dervive keys
	CKeyCollection *DeriveKeyCollection(
		CMemoryPool *mp, CExpressionHandle &exprhdl) const override;

	// derive max card
	virtual CMaxCard MaxCard(CMemoryPool *mp, CExpressionHandle &exprhdl) const;

	// derive constraint property
	CPropConstraint *
	DerivePropertyConstraint(CMemoryPool *,	 //mp,
							 CExpressionHandle &exprhdl) const override
	{
		return PpcDeriveConstraintPassThru(exprhdl, 0 /*ulChild*/);
	}

	//-------------------------------------------------------------------------------------
	// Transformations
	//-------------------------------------------------------------------------------------

	// candidate set of xforms
	CXformSet *PxfsCandidates(CMemoryPool *mp) const override;

	// derive statistics
	IStatistics *PstatsDerive(CMemoryPool *mp, CExpressionHandle &exprhdl,
							  IStatisticsArray *stats_ctxt) const override;

	//-------------------------------------------------------------------------------------
	//-------------------------------------------------------------------------------------
	//-------------------------------------------------------------------------------------

	// conversion function
	static CLogicalLeftAntiSemiJoin *
	PopConvert(COperator *pop)
	{
		GPOS_ASSERT(nullptr != pop);
		GPOS_ASSERT(EopLogicalLeftAntiSemiJoin == pop->Eopid());

		return dynamic_cast<CLogicalLeftAntiSemiJoin *>(pop);
	}

};	// class CLogicalLeftAntiSemiJoin

}  // namespace gpopt


#endif	// !GPOS_CLogicalLeftAntiSemiJoin_H

// EOF

相关信息

greenplumn 源码目录

相关文章

greenplumn CExpression 源码

greenplumn CExpressionFactorizer 源码

greenplumn CExpressionHandle 源码

greenplumn CExpressionPreprocessor 源码

greenplumn CExpressionUtils 源码

greenplumn CHashedDistributions 源码

greenplumn CLogical 源码

greenplumn CLogicalApply 源码

greenplumn CLogicalAssert 源码

greenplumn CLogicalBitmapTableGet 源码

0  赞