greenplumn CPhysicalInnerNLJoin 源码
greenplumn CPhysicalInnerNLJoin 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CPhysicalInnerNLJoin.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2009 Greenplum, Inc.
//
// @filename:
// CPhysicalInnerNLJoin.h
//
// @doc:
// Inner nested-loops join operator
//---------------------------------------------------------------------------
#ifndef GPOPT_CPhysicalInnerNLJoin_H
#define GPOPT_CPhysicalInnerNLJoin_H
#include "gpos/base.h"
#include "gpopt/operators/CPhysicalNLJoin.h"
namespace gpopt
{
//---------------------------------------------------------------------------
// @class:
// CPhysicalInnerNLJoin
//
// @doc:
// Inner nested-loops join operator
//
//---------------------------------------------------------------------------
class CPhysicalInnerNLJoin : public CPhysicalNLJoin
{
private:
public:
CPhysicalInnerNLJoin(const CPhysicalInnerNLJoin &) = delete;
// ctor
explicit CPhysicalInnerNLJoin(CMemoryPool *mp);
// dtor
~CPhysicalInnerNLJoin() override;
// ident accessors
EOperatorId
Eopid() const override
{
return EopPhysicalInnerNLJoin;
}
// return a string for operator name
const CHAR *
SzId() const override
{
return "CPhysicalInnerNLJoin";
}
// 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;
CEnfdDistribution *Ped(CMemoryPool *mp, CExpressionHandle &exprhdl,
CReqdPropPlan *prppInput, ULONG child_index,
CDrvdPropArray *pdrgpdpCtxt,
ULONG ulDistrReq) override;
// conversion function
static CPhysicalInnerNLJoin *
PopConvert(COperator *pop)
{
GPOS_ASSERT(EopPhysicalInnerNLJoin == pop->Eopid());
return dynamic_cast<CPhysicalInnerNLJoin *>(pop);
}
}; // class CPhysicalInnerNLJoin
} // namespace gpopt
#endif // !GPOPT_CPhysicalInnerNLJoin_H
// EOF
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