greenplumn CPhysicalHashAggDeduplicate 源码

greenplumn CPhysicalHashAggDeduplicate 代码

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

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2013 VMware, Inc. or its affiliates.
//
//	@filename:
//		CPhysicalHashAggDeduplicate.h
//
//	@doc:
//		Hash Aggregate operator for deduplicating join outputs
//---------------------------------------------------------------------------
#ifndef GPOS_CPhysicalHashAggDeduplicate_H
#define GPOS_CPhysicalHashAggDeduplicate_H

#include "gpos/base.h"

#include "gpopt/operators/CPhysicalHashAgg.h"

namespace gpopt
{
//---------------------------------------------------------------------------
//	@class:
//		CPhysicalHashAggDeduplicate
//
//	@doc:
//		Hash-based aggregate operator for deduplicating join outputs
//
//---------------------------------------------------------------------------
class CPhysicalHashAggDeduplicate : public CPhysicalHashAgg
{
private:
	// array of keys from the join's child
	CColRefArray *m_pdrgpcrKeys;

public:
	CPhysicalHashAggDeduplicate(const CPhysicalHashAggDeduplicate &) = delete;

	// ctor
	CPhysicalHashAggDeduplicate(CMemoryPool *mp, CColRefArray *colref_array,
								CColRefArray *pdrgpcrMinimal,
								COperator::EGbAggType egbaggtype,
								CColRefArray *pdrgpcrKeys,
								BOOL fGeneratesDuplicates, BOOL fMultiStage,
								BOOL isAggFromSplitDQA,
								CLogicalGbAgg::EAggStage aggStage,
								BOOL should_enforce_distribution);

	// dtor
	~CPhysicalHashAggDeduplicate() override;


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

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

	// array of keys from the join's child
	CColRefArray *
	PdrgpcrKeys() const
	{
		return m_pdrgpcrKeys;
	}

	//-------------------------------------------------------------------------------------
	// 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
	{
		return PcrsRequiredAgg(mp, exprhdl, pcrsRequired, child_index,
							   m_pdrgpcrKeys);
	}

	// 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
	{
		return PdsRequiredAgg(mp, exprhdl, pdsRequired, child_index, ulOptReq,
							  m_pdrgpcrKeys, m_pdrgpcrKeys);
	}

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

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

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

		return dynamic_cast<CPhysicalHashAggDeduplicate *>(pop);
	}

};	// class CPhysicalHashAggDeduplicate

}  // namespace gpopt


#endif	// !GPOS_CPhysicalHashAggDeduplicate_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