greenplumn CPhysicalCTEProducer 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CPhysicalCTEProducer.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CPhysicalCTEProducer.h
/
/ @doc:
/ Physical CTE producer operator
/---------------------------------------------------------------------------
#ifndef GPOPT_CPhysicalCTEProducer_H
#define GPOPT_CPhysicalCTEProducer_H
#include "gpos/base.h"
#include "gpopt/operators/CPhysical.h"
namespace gpopt
{
/---------------------------------------------------------------------------
/ @class:
/ CPhysicalCTEProducer
/
/ @doc:
/ CTE producer operator
/
/---------------------------------------------------------------------------
class CPhysicalCTEProducer : public CPhysical
{
private:
/ cte identifier
ULONG m_id;
/ cte columns
CColRefArray *m_pdrgpcr;
/ set representation of cte columns
CColRefSet *m_pcrs;
public:
CPhysicalCTEProducer(const CPhysicalCTEProducer &) = delete;
/ ctor
CPhysicalCTEProducer(CMemoryPool *mp, ULONG id, CColRefArray *colref_array);
/ dtor
~CPhysicalCTEProducer() override;
/ ident accessors
EOperatorId
Eopid() const override
{
return EopPhysicalCTEProducer;
}
const CHAR *
SzId() const override
{
return "CPhysicalCTEProducer";
}
/ cte identifier
ULONG
UlCTEId() const
{
return m_id;
}
/ cte columns
CColRefArray *
Pdrgpcr() const
{
return m_pdrgpcr;
}
/ 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 CPhysicalCTEProducer *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopPhysicalCTEProducer == pop->Eopid());
return dynamic_cast<CPhysicalCTEProducer *>(pop);
}
/ debug print
IOstream &OsPrint(IOstream &) const override;
}; / class CPhysicalCTEProducer
} / namespace gpopt
#endif / !GPOPT_CPhysicalCTEProducer_H
/ EOF
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