greenplumn CReqdPropPlan 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/base/CReqdPropPlan.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2009 - 2011 EMC CORP.
/
/ @filename:
/ CReqdPropPlan.h
/
/ @doc:
/ Derived required relational properties
/---------------------------------------------------------------------------
#ifndef GPOPT_CReqdPropPlan_H
#define GPOPT_CReqdPropPlan_H
#include "gpos/base.h"
#include "gpopt/base/CColRef.h"
#include "gpopt/base/CReqdProp.h"
namespace gpopt
{
using namespace gpos;
/ forward declaration
class CColRefSet;
class CDrvdPropRelational;
class CDrvdPropPlan;
class CEnfdOrder;
class CEnfdDistribution;
class CEnfdRewindability;
class CEnfdPartitionPropagation;
class CExpressionHandle;
class CCTEReq;
class CPartInfo;
class CPhysical;
class CPropSpec;
/---------------------------------------------------------------------------
/ @class:
/ CReqdPropPlan
/
/ @doc:
/ Required plan properties container.
/
/---------------------------------------------------------------------------
class CReqdPropPlan : public CReqdProp
{
private:
/ required columns
CColRefSet *m_pcrs{nullptr};
/ required sort order
CEnfdOrder *m_peo{nullptr};
/ required distribution
CEnfdDistribution *m_ped{nullptr};
/ required rewindability
CEnfdRewindability *m_per{nullptr};
/ required partition propagation
CEnfdPartitionPropagation *m_pepp{nullptr};
/ required ctes
CCTEReq *m_pcter{nullptr};
public:
CReqdPropPlan(const CReqdPropPlan &) = delete;
/ default ctor
CReqdPropPlan() = default;
/ ctor
CReqdPropPlan(CColRefSet *pcrs, CEnfdOrder *peo, CEnfdDistribution *ped,
CEnfdRewindability *per, CEnfdPartitionPropagation *pepp,
CCTEReq *pcter);
/ dtor
~CReqdPropPlan() override;
/ type of properties
BOOL
FPlan() const override
{
GPOS_ASSERT(!FRelational());
return true;
}
/ required properties computation function
void Compute(CMemoryPool *mp, CExpressionHandle &exprhdl,
CReqdProp *prpInput, ULONG child_index,
CDrvdPropArray *pdrgpdpCtxt, ULONG ulOptReq) override;
/ required columns computation function
void ComputeReqdCols(CMemoryPool *mp, CExpressionHandle &exprhdl,
CReqdProp *prpInput, ULONG child_index,
CDrvdPropArray *pdrgpdpCtxt);
/ required ctes computation function
void ComputeReqdCTEs(CMemoryPool *mp, CExpressionHandle &exprhdl,
CReqdProp *prpInput, ULONG child_index,
CDrvdPropArray *pdrgpdpCtxt);
/ required columns accessor
CColRefSet *
PcrsRequired() const
{
return m_pcrs;
}
/ required order accessor
CEnfdOrder *
Peo() const
{
return m_peo;
}
/ required distribution accessor
CEnfdDistribution *
Ped() const
{
return m_ped;
}
/ required rewindability accessor
CEnfdRewindability *
Per() const
{
return m_per;
}
/ required partition propagation accessor
CEnfdPartitionPropagation *
Pepp() const
{
return m_pepp;
}
/ required cte accessor
CCTEReq *
Pcter() const
{
return m_pcter;
}
/ given a property spec type, return the corresponding property spec member
CPropSpec *Pps(ULONG ul) const;
/ equality function
BOOL Equals(const CReqdPropPlan *prpp) const;
/ hash function
ULONG HashValue() const;
/ check if plan properties are satisfied by the given derived properties
BOOL FSatisfied(const CDrvdPropRelational *pdprel,
const CDrvdPropPlan *pdpplan) const;
/ check if plan properties are compatible with the given derived properties
BOOL FCompatible(CExpressionHandle &exprhdl, CPhysical *popPhysical,
const CDrvdPropRelational *pdprel,
const CDrvdPropPlan *pdpplan) const;
/ check if expression attached to handle provides required columns by all plan properties
BOOL FProvidesReqdCols(CMemoryPool *mp, CExpressionHandle &exprhdl,
ULONG ulOptReq) const;
/ shorthand for conversion
static CReqdPropPlan *
Prpp(CReqdProp *prp)
{
GPOS_ASSERT(nullptr != prp);
return dynamic_cast<CReqdPropPlan *>(prp);
}
/generate empty required properties
static CReqdPropPlan *PrppEmpty(CMemoryPool *mp);
/ hash function used for cost bounding
static ULONG UlHashForCostBounding(const CReqdPropPlan *prpp);
/ equality function used for cost bounding
static BOOL FEqualForCostBounding(const CReqdPropPlan *prppFst,
const CReqdPropPlan *prppSnd);
/ map input required and derived plan properties into new required plan properties
static CReqdPropPlan *PrppRemapForCTE(CMemoryPool *mp,
CReqdPropPlan *prppInput,
CDrvdPropPlan *pdpplanInput,
UlongToColRefMap *colref_mapping);
/ print function
IOstream &OsPrint(IOstream &os) const override;
}; / class CReqdPropPlan
} / namespace gpopt
#endif / !GPOPT_CReqdPropPlan_H
/ EOF
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