greenplumn CLogicalDynamicBitmapTableGet 源码

greenplumn CLogicalDynamicBitmapTableGet 代码

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

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2014 VMware, Inc. or its affiliates.
//
//	@filename:
//		CLogicalDynamicBitmapTableGet.h
//
//	@doc:
//		Logical operator for dynamic table access via bitmap indexes.
//
//	@owner:
//
//
//	@test:
//
//---------------------------------------------------------------------------

#ifndef GPOPT_CLogicalDynamicBitmapTableGet_H
#define GPOPT_CLogicalDynamicBitmapTableGet_H

#include "gpos/base.h"

#include "gpopt/operators/CLogicalDynamicGetBase.h"

namespace gpopt
{
// fwd declarations
class CColRefSet;
class CTableDescriptor;

//---------------------------------------------------------------------------
//	@class:
//		CLogicalDynamicBitmapTableGet
//
//	@doc:
//		Logical operator for dynamic table access via bitmap indexes.
//
//---------------------------------------------------------------------------
class CLogicalDynamicBitmapTableGet : public CLogicalDynamicGetBase
{
private:
	// origin operator id -- gpos::ulong_max if operator was not generated via a transformation
	ULONG m_ulOriginOpId;

public:
	CLogicalDynamicBitmapTableGet(const CLogicalDynamicBitmapTableGet &) =
		delete;

	// ctors
	CLogicalDynamicBitmapTableGet(CMemoryPool *mp, CTableDescriptor *ptabdesc,
								  ULONG ulOriginOpId,
								  const CName *pnameTableAlias,
								  ULONG ulPartIndex,
								  CColRefArray *pdrgpcrOutput,
								  CColRef2dArray *pdrgpdrgpcrPart,
								  IMdIdArray *partition_mdids);

	explicit CLogicalDynamicBitmapTableGet(CMemoryPool *mp);

	// dtor
	~CLogicalDynamicBitmapTableGet() override;

	// identifier
	EOperatorId
	Eopid() const override
	{
		return EopLogicalDynamicBitmapTableGet;
	}

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

	// 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 true;
	}

	// return a copy of the operator with remapped columns
	COperator *PopCopyWithRemappedColumns(CMemoryPool *mp,
										  UlongToColRefMap *colref_mapping,
										  BOOL must_exist) override;

	// derive outer references
	CColRefSet *DeriveOuterReferences(CMemoryPool *mp,
									  CExpressionHandle &exprhdl) override;

	// derive constraint property
	CPropConstraint *DerivePropertyConstraint(
		CMemoryPool *mp, CExpressionHandle &exprhdl) const override;

	// compute required stat columns of the n-th child
	CColRefSet *
	PcrsStat(CMemoryPool *mp,
			 CExpressionHandle &,  // exprhdl
			 CColRefSet *,		   //pcrsInput
			 ULONG				   // child_index
	) const override
	{
		return GPOS_NEW(mp) CColRefSet(mp);
	}

	// candidate set of xforms
	CXformSet *PxfsCandidates(CMemoryPool *mp) const override;

	// derive statistics
	IStatistics *PstatsDerive(CMemoryPool *mp, CExpressionHandle &exprhdl,
							  IStatisticsArray *stats_ctxt) const override;

	// stat promise
	EStatPromise
	Esp(CExpressionHandle &) const override
	{
		return CLogical::EspHigh;
	}

	// origin operator id -- gpos::ulong_max if operator was not generated via a transformation
	ULONG
	UlOriginOpId() const
	{
		return m_ulOriginOpId;
	}

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

	// conversion
	static CLogicalDynamicBitmapTableGet *
	PopConvert(COperator *pop)
	{
		GPOS_ASSERT(nullptr != pop);
		GPOS_ASSERT(EopLogicalDynamicBitmapTableGet == pop->Eopid());

		return dynamic_cast<CLogicalDynamicBitmapTableGet *>(pop);
	}

};	// class CLogicalDynamicBitmapTableGet
}  // namespace gpopt

#endif	// !GPOPT_CLogicalDynamicBitmapTableGet_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