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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