greenplumn CPhysicalMotion 源码

greenplumn CPhysicalMotion 代码

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

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2011 EMC Corp.
//
//	@filename:
//		CPhysicalMotion.h
//
//	@doc:
//		Base class for Motion operators
//---------------------------------------------------------------------------
#ifndef GPOPT_CPhysicalMotion_H
#define GPOPT_CPhysicalMotion_H

#include "gpos/base.h"

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


namespace gpopt
{
//---------------------------------------------------------------------------
//	@class:
//		CPhysicalMotion
//
//	@doc:
//		Base class for Motion operators
//
//---------------------------------------------------------------------------
class CPhysicalMotion : public CPhysical
{
private:
protected:
	// ctor
	explicit CPhysicalMotion(CMemoryPool *mp) : CPhysical(mp)
	{
	}

	// sensitivity to order of inputs
	BOOL
	FInputOrderSensitive() const override
	{
		return true;
	}

public:
	CPhysicalMotion(const CPhysicalMotion &) = delete;

	// output distribution accessor
	virtual CDistributionSpec *Pds() const = 0;

	// check if optimization contexts is valid
	BOOL FValidContext(CMemoryPool *mp, COptimizationContext *poc,
					   COptimizationContextArray *pdrgpocChild) const override;

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

	// compute required ctes of the n-th child
	CCTEReq *PcteRequired(CMemoryPool *mp, CExpressionHandle &exprhdl,
						  CCTEReq *pcter, ULONG child_index,
						  CDrvdPropArray *pdrgpdpCtxt,
						  ULONG ulOptReq) const override;

	// 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;

	// 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 partition propoagation spec of the n-th child
	CPartitionPropagationSpec *PppsRequired(
		CMemoryPool *mp, CExpressionHandle &exprhdl,
		CPartitionPropagationSpec *pppsRequired, ULONG child_index,
		CDrvdPropArray *pdrgpdpCtxt, ULONG ulOptReq) const override;

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

	// derive distribution
	CDistributionSpec *PdsDerive(CMemoryPool *mp,
								 CExpressionHandle &exprhdl) const override;

	// derive rewindability
	CRewindabilitySpec *PrsDerive(CMemoryPool *mp,
								  CExpressionHandle &exprhdl) const override;

	// derived properties: derive partition propagation spec
	CPartitionPropagationSpec *PppsDerive(
		CMemoryPool *mp, CExpressionHandle &exprhdl) const override;

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

	// return distribution property enforcing type for this operator
	CEnfdProp::EPropEnforcingType EpetDistribution(
		CExpressionHandle &exprhdl,
		const CEnfdDistribution *ped) const override;

	// return rewindability property enforcing type for this operator
	CEnfdProp::EPropEnforcingType EpetRewindability(
		CExpressionHandle &,		// exprhdl
		const CEnfdRewindability *	// per
	) const override;

	// return true if operator passes through stats obtained from children,
	// this is used when computing stats during costing
	BOOL
	FPassThruStats() const override
	{
		return true;
	}

	// conversion function
	static CPhysicalMotion *
	PopConvert(COperator *pop)
	{
		GPOS_ASSERT(CUtils::FPhysicalMotion(pop));

		return dynamic_cast<CPhysicalMotion *>(pop);
	}

};	// class CPhysicalMotion

}  // namespace gpopt

#endif	// !GPOPT_CPhysicalMotion_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