greenplumn CPhysicalMotionHashDistribute 源码

greenplumn CPhysicalMotionHashDistribute 代码

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

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2011 EMC Corp.
//
//	@filename:
//		CPhysicalMotionHashDistribute.h
//
//	@doc:
//		Physical Hash distribute motion operator
//---------------------------------------------------------------------------
#ifndef GPOPT_CPhysicalMotionHashDistribute_H
#define GPOPT_CPhysicalMotionHashDistribute_H

#include "gpos/base.h"

#include "gpopt/base/CDistributionSpecHashed.h"
#include "gpopt/base/COrderSpec.h"
#include "gpopt/operators/CPhysicalMotion.h"

namespace gpopt
{
//---------------------------------------------------------------------------
//	@class:
//		CPhysicalMotionHashDistribute
//
//	@doc:
//		Hash distribute motion operator
//
//---------------------------------------------------------------------------
class CPhysicalMotionHashDistribute : public CPhysicalMotion
{
private:
	// hash distribution spec
	CDistributionSpecHashed *m_pdsHashed;

	// required columns in distribution spec
	CColRefSet *m_pcrsRequiredLocal;

public:
	CPhysicalMotionHashDistribute(const CPhysicalMotionHashDistribute &) =
		delete;

	// ctor
	CPhysicalMotionHashDistribute(CMemoryPool *mp,
								  CDistributionSpecHashed *pdsHashed);

	// dtor
	~CPhysicalMotionHashDistribute() override;

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

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

	// output distribution accessor
	CDistributionSpec *
	Pds() const override
	{
		return m_pdsHashed;
	}

	// is motion eliminating duplicates
	BOOL
	IsDuplicateSensitive() const
	{
		return m_pdsHashed->IsDuplicateSensitive();
	}

	// match function
	BOOL Matches(COperator *) const override;

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

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

	// 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;

	// check if required columns are included in output columns
	BOOL FProvidesReqdCols(CExpressionHandle &exprhdl, CColRefSet *pcrsRequired,
						   ULONG ulOptReq) const override;

	//-------------------------------------------------------------------------------------
	// Derived Plan Properties
	//-------------------------------------------------------------------------------------

	// derive sort order
	COrderSpec *PosDerive(CMemoryPool *mp,
						  CExpressionHandle &exprhdl) const override;

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

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

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

	// print
	IOstream &OsPrint(IOstream &) const override;

	// conversion function
	static CPhysicalMotionHashDistribute *PopConvert(COperator *pop);

	CDistributionSpec *PdsRequired(CMemoryPool *mp, CExpressionHandle &exprhdl,
								   CDistributionSpec *pdsRequired,
								   ULONG child_index,
								   CDrvdPropArray *pdrgpdpCtxt,
								   ULONG ulOptReq) const override;

};	// class CPhysicalMotionHashDistribute

}  // namespace gpopt

#endif	// !GPOPT_CPhysicalMotionHashDistribute_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