greenplumn CPhysicalRightOuterHashJoin 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CPhysicalRightOuterHashJoin.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (c) 2020 VMware, Inc.
/
/ @filename:
/ CPhysicalRightOuterHashJoin.h
/
/ @doc:
/ Right outer hash join operator
/---------------------------------------------------------------------------
#ifndef GPOPT_CPhysicalRightOuterHashJoin_H
#define GPOPT_CPhysicalRightOuterHashJoin_H
#include "gpos/base.h"
#include "gpopt/operators/CPhysicalHashJoin.h"
namespace gpopt
{
/---------------------------------------------------------------------------
/ @class:
/ CPhysicalRightOuterHashJoin
/
/ @doc:
/ Right outer hash join operator
/
/---------------------------------------------------------------------------
class CPhysicalRightOuterHashJoin : public CPhysicalHashJoin
{
private:
protected:
/ create optimization requests
void CreateOptRequests(CMemoryPool *mp) override;
public:
CPhysicalRightOuterHashJoin(const CPhysicalRightOuterHashJoin &) = delete;
/ ctor
CPhysicalRightOuterHashJoin(
CMemoryPool *mp, CExpressionArray *pdrgpexprOuterKeys,
CExpressionArray *pdrgpexprInnerKeys, IMdIdArray *hash_opfamilies,
CXform::EXformId origin_xform = CXform::ExfSentinel);
/ dtor
~CPhysicalRightOuterHashJoin() override;
/ ident accessors
EOperatorId
Eopid() const override
{
return EopPhysicalRightOuterHashJoin;
}
/ return a string for operator name
const CHAR *
SzId() const override
{
return "CPhysicalRightOuterHashJoin";
}
/ conversion function
static CPhysicalRightOuterHashJoin *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopPhysicalRightOuterHashJoin == pop->Eopid());
return dynamic_cast<CPhysicalRightOuterHashJoin *>(pop);
}
/-------------------------------------------------------------------------------------
/ Required Plan Properties
/-------------------------------------------------------------------------------------
/ compute required distribution of the n-th child
CEnfdDistribution *Ped(CMemoryPool *mp, CExpressionHandle &exprhdl,
CReqdPropPlan *prppInput, ULONG child_index,
CDrvdPropArray *pdrgpdpCtxt,
ULONG ulOptReq) override;
}; / class CPhysicalRightOuterHashJoin
} / namespace gpopt
#endif / !GPOPT_CPhysicalRightOuterHashJoin_H
/ EOF
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