greenplumn CPhysicalCorrelatedLeftAntiSemiNLJoin 源码

greenplumn CPhysicalCorrelatedLeftAntiSemiNLJoin 代码

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

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2014 VMware, Inc. or its affiliates.
//
//	@filename:
//		CPhysicalCorrelatedLeftAntiSemiNLJoin.h
//
//	@doc:
//		Physical Left Anti Semi NLJ operator capturing correlated execution
//		of NOT EXISTS subqueries
//---------------------------------------------------------------------------
#ifndef GPOPT_CPhysicalCorrelatedLeftAntiSemiNLJoin_H
#define GPOPT_CPhysicalCorrelatedLeftAntiSemiNLJoin_H

#include "gpos/base.h"

#include "gpopt/operators/CPhysicalLeftAntiSemiNLJoin.h"

namespace gpopt
{
//---------------------------------------------------------------------------
//	@class:
//		CPhysicalCorrelatedLeftAntiSemiNLJoin
//
//	@doc:
//		Physical left anti semi NLJ operator capturing correlated execution of
//		NOT EXISTS subqueries
//
//---------------------------------------------------------------------------
class CPhysicalCorrelatedLeftAntiSemiNLJoin : public CPhysicalLeftAntiSemiNLJoin
{
private:
	// columns from inner child used in correlated execution
	CColRefArray *m_pdrgpcrInner;

	// origin subquery id
	EOperatorId m_eopidOriginSubq;

public:
	CPhysicalCorrelatedLeftAntiSemiNLJoin(
		const CPhysicalCorrelatedLeftAntiSemiNLJoin &) = delete;

	// ctor
	CPhysicalCorrelatedLeftAntiSemiNLJoin(CMemoryPool *mp,
										  CColRefArray *pdrgpcrInner,
										  EOperatorId eopidOriginSubq)
		: CPhysicalLeftAntiSemiNLJoin(mp),
		  m_pdrgpcrInner(pdrgpcrInner),
		  m_eopidOriginSubq(eopidOriginSubq)
	{
		GPOS_ASSERT(nullptr != pdrgpcrInner);

		SetDistrRequests(UlDistrRequestsForCorrelatedJoin());
		GPOS_ASSERT(0 < UlDistrRequests());
	}

	// dtor
	~CPhysicalCorrelatedLeftAntiSemiNLJoin() override
	{
		m_pdrgpcrInner->Release();
	}

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

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

	// match function
	BOOL
	Matches(COperator *pop) const override
	{
		if (pop->Eopid() == Eopid())
		{
			return m_pdrgpcrInner->Equals(
				CPhysicalCorrelatedLeftAntiSemiNLJoin::PopConvert(pop)
					->PdrgPcrInner());
		}

		return false;
	}

	// distribution matching type
	CEnfdDistribution::EDistributionMatching
	Edm(CReqdPropPlan *,   // prppInput
		ULONG,			   // child_index
		CDrvdPropArray *,  //pdrgpdpCtxt
		ULONG			   // ulOptReq
		) override
	{
		return CEnfdDistribution::EdmSatisfy;
	}

	CEnfdDistribution *
	Ped(CMemoryPool *mp, CExpressionHandle &exprhdl, CReqdPropPlan *prppInput,
		ULONG child_index, CDrvdPropArray *pdrgpdpCtxt, ULONG ulOptReq) override
	{
		return PedCorrelatedJoin(mp, exprhdl, prppInput, child_index,
								 pdrgpdpCtxt, ulOptReq);
	}

	// compute required distribution of the n-th child
	CDistributionSpec *
	PdsRequired(CMemoryPool *,		  // mp
				CExpressionHandle &,  // exprhdl,
				CDistributionSpec *,  // pdsRequired,
				ULONG,				  // child_index,
				CDrvdPropArray *,	  // pdrgpdpCtxt,
				ULONG				  //ulOptReq
	) const override
	{
		GPOS_RAISE(
			CException::ExmaInvalid, CException::ExmiInvalid,
			GPOS_WSZ_LIT(
				"PdsRequired should not be called for CPhysicalCorrelatedLeftAntiSemiNLJoin"));
		return nullptr;
	}

	// compute required rewindability of the n-th child
	CRewindabilitySpec *
	PrsRequired(CMemoryPool *mp, CExpressionHandle &exprhdl,
				CRewindabilitySpec *prsRequired, ULONG child_index,
				CDrvdPropArray *pdrgpdpCtxt, ULONG ulOptReq) const override
	{
		return PrsRequiredCorrelatedJoin(mp, exprhdl, prsRequired, child_index,
										 pdrgpdpCtxt, ulOptReq);
	}

	// return true if operator is a correlated NL Join
	BOOL
	FCorrelated() const override
	{
		return true;
	}

	// return required inner columns
	CColRefArray *
	PdrgPcrInner() const override
	{
		return m_pdrgpcrInner;
	}

	// print
	IOstream &
	OsPrint(IOstream &os) const override
	{
		os << this->SzId() << "(";
		(void) CUtils::OsPrintDrgPcr(os, m_pdrgpcrInner);
		os << ")";

		return os;
	}

	// origin subquery id
	EOperatorId
	EopidOriginSubq() const
	{
		return m_eopidOriginSubq;
	}

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

		return dynamic_cast<CPhysicalCorrelatedLeftAntiSemiNLJoin *>(pop);
	}

};	// class CPhysicalCorrelatedLeftAntiSemiNLJoin

}  // namespace gpopt


#endif	// !GPOPT_CPhysicalCorrelatedLeftAntiSemiNLJoin_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