greenplumn CEnfdPartitionPropagation 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/base/CEnfdPartitionPropagation.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CEnfdPartitionPropagation.h
/
/ @doc:
/ Enforceable partition propagation property
/---------------------------------------------------------------------------
#ifndef GPOPT_CEnfdPartitionPropagation_H
#define GPOPT_CEnfdPartitionPropagation_H
#include "gpos/base.h"
#include "gpopt/base/CEnfdProp.h"
#include "gpopt/base/CPartitionPropagationSpec.h"
namespace gpopt
{
using namespace gpos;
/---------------------------------------------------------------------------
/ @class:
/ CEnfdPartitionPropagation
/
/ @doc:
/ Enforceable distribution property;
/
/---------------------------------------------------------------------------
class CEnfdPartitionPropagation : public CEnfdProp
{
public:
/ type of partition matching function(s)
enum EPartitionPropagationMatching
{
EppmSatisfy = 0,
EppmSentinel
};
private:
/ partition propagation spec
CPartitionPropagationSpec *m_ppps;
/ partition propagation matching type
EPartitionPropagationMatching m_eppm;
public:
CEnfdPartitionPropagation(const CEnfdPartitionPropagation &) = delete;
/ ctor
CEnfdPartitionPropagation(CPartitionPropagationSpec *ppps,
EPartitionPropagationMatching eppm);
/ dtor
~CEnfdPartitionPropagation() override;
/ partition spec accessor
CPropSpec *
Pps() const override
{
return m_ppps;
}
/ hash function
ULONG HashValue() const override;
/ required propagation accessor
CPartitionPropagationSpec *
PppsRequired() const
{
return m_ppps;
}
/ get distribution enforcing type for the given operator
EPropEnforcingType Epet(CExpressionHandle &exprhdl, CPhysical *popPhysical,
BOOL fPropagationReqd) const;
/ return matching type
EPartitionPropagationMatching
Eppm() const
{
return m_eppm;
}
/ matching function
BOOL Matches(CEnfdPartitionPropagation *pepp);
BOOL FCompatible(CPartitionPropagationSpec *pps_drvd) const;
/ print function
IOstream &OsPrint(IOstream &os) const override;
/ name of propagation matching type
static const CHAR *SzPropagationMatching(
EPartitionPropagationMatching eppm);
}; / class CEnfdPartitionPropagation
} / namespace gpopt
#endif / !GPOPT_CEnfdPartitionPropagation_H
/ EOF
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