greenplumn CPhysicalCTEConsumer 源码

greenplumn CPhysicalCTEConsumer 代码

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

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2012 EMC Corp.
//
//	@filename:
//		CPhysicalCTEConsumer.h
//
//	@doc:
//		Physical CTE consumer operator
//---------------------------------------------------------------------------
#ifndef GPOPT_CPhysicalCTEConsumer_H
#define GPOPT_CPhysicalCTEConsumer_H

#include "gpos/base.h"

#include "gpopt/operators/CPhysical.h"

namespace gpopt
{
//---------------------------------------------------------------------------
//	@class:
//		CPhysicalCTEConsumer
//
//	@doc:
//		CTE consumer operator
//
//---------------------------------------------------------------------------
class CPhysicalCTEConsumer : public CPhysical
{
private:
	// cte identifier
	ULONG m_id;

	// cte columns
	CColRefArray *m_pdrgpcr;

	// hashmap for all the columns in the CTE expression
	UlongToColRefMap *m_phmulcr;

public:
	CPhysicalCTEConsumer(const CPhysicalCTEConsumer &) = delete;

	// ctor
	CPhysicalCTEConsumer(CMemoryPool *mp, ULONG id, CColRefArray *colref_array,
						 UlongToColRefMap *colref_mapping);

	// dtor
	~CPhysicalCTEConsumer() override;

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

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

	// cte identifier
	ULONG
	UlCTEId() const
	{
		return m_id;
	}

	// cte columns
	CColRefArray *
	Pdrgpcr() const
	{
		return m_pdrgpcr;
	}

	// column mapping
	UlongToColRefMap *
	Phmulcr() const
	{
		return m_phmulcr;
	}

	// operator specific hash function
	ULONG HashValue() const override;

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

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

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

	// 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;

	// 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 sort order of the n-th child
	COrderSpec *PosRequired(CMemoryPool *mp, CExpressionHandle &exprhdl,
							COrderSpec *posRequired, 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;

	// 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;

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

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

	// derive cte map
	CCTEMap *PcmDerive(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;

	// 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 false;
	}

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

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

		return dynamic_cast<CPhysicalCTEConsumer *>(pop);
	}

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

};	// class CPhysicalCTEConsumer

}  // namespace gpopt

#endif	// !GPOPT_CPhysicalCTEConsumer_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