greenplumn CPhysicalNLJoin 源码

greenplumn CPhysicalNLJoin 代码

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

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2012 EMC Corp.
//
//	@filename:
//		CPhysicalNLJoin.h
//
//	@doc:
//		Base nested-loops join operator
//---------------------------------------------------------------------------
#ifndef GPOPT_CPhysicalNLJoin_H
#define GPOPT_CPhysicalNLJoin_H

#include "gpos/base.h"

#include "gpopt/base/CUtils.h"
#include "gpopt/operators/CPhysicalJoin.h"

namespace gpopt
{
//---------------------------------------------------------------------------
//	@class:
//		CPhysicalNLJoin
//
//	@doc:
//		Inner nested-loops join operator
//
//---------------------------------------------------------------------------
class CPhysicalNLJoin : public CPhysicalJoin
{
private:
public:
	CPhysicalNLJoin(const CPhysicalNLJoin &) = delete;

	// ctor
	explicit CPhysicalNLJoin(CMemoryPool *mp);

	// dtor
	~CPhysicalNLJoin() override;

	//-------------------------------------------------------------------------------------
	// Required Plan Properties
	//-------------------------------------------------------------------------------------

	// compute required sort order of the n-th child
	COrderSpec *PosRequired(CMemoryPool *mp, CExpressionHandle &exprhdl,
							COrderSpec *posInput, ULONG child_index,
							CDrvdPropArray *pdrgpdpCtxt,
							ULONG ulOptReq) const override;

	// 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;

	// compute required output columns of the n-th child
	CColRefSet *PcrsRequired(CMemoryPool *mp, CExpressionHandle &exprhdl,
							 CColRefSet *pcrsRequired, ULONG child_index,
							 CDrvdPropArray *,	// pdrgpdpCtxt
							 ULONG				// ulOptReq
							 ) override;

	//-------------------------------------------------------------------------------------
	// Enforced Properties
	//-------------------------------------------------------------------------------------

	// return order property enforcing type for this operator
	CEnfdProp::EPropEnforcingType EpetOrder(
		CExpressionHandle &exprhdl, const CEnfdOrder *peo) const override;

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

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

	// return required inner columns -- overloaded by correlated join children
	virtual CColRefArray *
	PdrgPcrInner() const
	{
		return nullptr;
	}

	// conversion function
	static CPhysicalNLJoin *
	PopConvert(COperator *pop)
	{
		GPOS_ASSERT(CUtils::FNLJoin(pop));

		return dynamic_cast<CPhysicalNLJoin *>(pop);
	}


};	// class CPhysicalNLJoin

}  // namespace gpopt

#endif	// !GPOPT_CPhysicalNLJoin_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