greenplumn CPhysicalTVF 源码

greenplumn CPhysicalTVF 代码

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

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2012 EMC Corp.
//
//	@filename:
//		CPhysicalTVF.h
//
//	@doc:
//		Physical Table-valued function
//---------------------------------------------------------------------------
#ifndef GPOPT_CPhysicalTVF_H
#define GPOPT_CPhysicalTVF_H

#include "gpos/base.h"

#include "gpopt/metadata/CTableDescriptor.h"
#include "gpopt/operators/CPhysical.h"

namespace gpopt
{
//---------------------------------------------------------------------------
//	@class:
//		CPhysicalTVF
//
//	@doc:
//		Physical Table-valued function
//
//---------------------------------------------------------------------------
class CPhysicalTVF : public CPhysical
{
private:
	// function mdid
	IMDId *m_func_mdid;

	// return type
	IMDId *m_return_type_mdid;

	// function name
	CWStringConst *m_pstr;

	// MD cache info
	const IMDFunction *m_pmdfunc;

	// array of column descriptors: the schema of the function result
	CColumnDescriptorArray *m_pdrgpcoldesc;

	// output columns
	CColRefSet *m_pcrsOutput;

public:
	CPhysicalTVF(const CPhysicalTVF &) = delete;

	// ctor
	CPhysicalTVF(CMemoryPool *mp, IMDId *mdid_func, IMDId *mdid_return_type,
				 CWStringConst *str, CColumnDescriptorArray *pdrgpcoldesc,
				 CColRefSet *pcrsOutput);

	// dtor
	~CPhysicalTVF() override;

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

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

	// function mdid
	IMDId *
	FuncMdId() const
	{
		return m_func_mdid;
	}

	// return type
	IMDId *
	ReturnTypeMdId() const
	{
		return m_return_type_mdid;
	}

	// function name
	const CWStringConst *
	Pstr() const
	{
		return m_pstr;
	}

	// col descr accessor
	CColumnDescriptorArray *
	Pdrgpcoldesc() const
	{
		return m_pdrgpcoldesc;
	}

	// accessors
	CColRefSet *
	DeriveOutputColumns() const
	{
		return m_pcrsOutput;
	}

	// sensitivity to order of inputs
	BOOL FInputOrderSensitive() const override;

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

	//-------------------------------------------------------------------------------------
	// 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 partition propagation
	CPartitionPropagationSpec *PppsDerive(
		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 CPhysicalTVF *
	PopConvert(COperator *pop)
	{
		GPOS_ASSERT(nullptr != pop);
		GPOS_ASSERT(EopPhysicalTVF == pop->Eopid());

		return dynamic_cast<CPhysicalTVF *>(pop);
	}

};	// class CPhysicalTVF

}  // namespace gpopt

#endif	// !GPOPT_CPhysicalTVF_H

// EOF

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