greenplumn CLogicalCTEProducer 源码

greenplumn CLogicalCTEProducer 代码

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

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2012 EMC Corp.
//
//	@filename:
//		CLogicalCTEProducer.h
//
//	@doc:
//		Logical CTE producer operator
//---------------------------------------------------------------------------
#ifndef GPOPT_CLogicalCTEProducer_H
#define GPOPT_CLogicalCTEProducer_H

#include "gpos/base.h"

#include "gpopt/operators/CExpressionHandle.h"
#include "gpopt/operators/CLogical.h"

namespace gpopt
{
//---------------------------------------------------------------------------
//	@class:
//		CLogicalCTEProducer
//
//	@doc:
//		CTE producer operator
//
//---------------------------------------------------------------------------
class CLogicalCTEProducer : public CLogical
{
private:
	// cte identifier
	ULONG m_id;

	// cte columns
	CColRefArray *m_pdrgpcr;

	// output columns, same as cte columns but in CColRefSet
	CColRefSet *m_pcrsOutput;

public:
	CLogicalCTEProducer(const CLogicalCTEProducer &) = delete;

	// ctor
	explicit CLogicalCTEProducer(CMemoryPool *mp);

	// ctor
	CLogicalCTEProducer(CMemoryPool *mp, ULONG id, CColRefArray *colref_array);

	// dtor
	~CLogicalCTEProducer() override;

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

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

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

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

	// cte columns in CColRefSet
	CColRefSet *
	DeriveOutputColumns() const
	{
		return m_pcrsOutput;
	}

	// 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;
	}

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

	//-------------------------------------------------------------------------------------
	// Derived Relational Properties
	//-------------------------------------------------------------------------------------

	// derive output columns
	CColRefSet *DeriveOutputColumns(CMemoryPool *mp,
									CExpressionHandle &exprhdl) override;

	// dervive keys
	CKeyCollection *DeriveKeyCollection(
		CMemoryPool *mp, CExpressionHandle &exprhdl) const override;

	// derive max card
	CMaxCard DeriveMaxCard(CMemoryPool *mp,
						   CExpressionHandle &exprhdl) const override;

	// derive not nullable output columns
	CColRefSet *DeriveNotNullColumns(CMemoryPool *mp,
									 CExpressionHandle &exprhdl) const override;

	// derive constraint property
	CPropConstraint *
	DerivePropertyConstraint(CMemoryPool *mp,
							 CExpressionHandle &exprhdl) const override
	{
		return PpcDeriveConstraintRestrict(mp, exprhdl, m_pcrsOutput);
	}

	// derive partition consumer info
	CPartInfo *
	DerivePartitionInfo(CMemoryPool *,	// mp,
						CExpressionHandle &exprhdl) const override
	{
		return PpartinfoPassThruOuter(exprhdl);
	}

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

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

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

	//-------------------------------------------------------------------------------------
	// Transformations
	//-------------------------------------------------------------------------------------

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

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

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

		return dynamic_cast<CLogicalCTEProducer *>(pop);
	}

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

};	// class CLogicalCTEProducer

}  // namespace gpopt

#endif	// !GPOPT_CLogicalCTEProducer_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