greenplumn CEnfdPartitionPropagation 源码
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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