greenplumn CPhysicalLeftAntiSemiNLJoin 源码
greenplumn CPhysicalLeftAntiSemiNLJoin 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CPhysicalLeftAntiSemiNLJoin.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2011 EMC Corp.
//
// @filename:
// CPhysicalLeftAntiSemiNLJoin.h
//
// @doc:
// Left anti semi nested-loops join operator
//---------------------------------------------------------------------------
#ifndef GPOPT_CPhysicalLeftAntiSemiNLJoin_H
#define GPOPT_CPhysicalLeftAntiSemiNLJoin_H
#include "gpos/base.h"
#include "gpopt/operators/CPhysicalNLJoin.h"
namespace gpopt
{
//---------------------------------------------------------------------------
// @class:
// CPhysicalLeftAntiSemiNLJoin
//
// @doc:
// Left anti semi nested-loops join operator
//
//---------------------------------------------------------------------------
class CPhysicalLeftAntiSemiNLJoin : public CPhysicalNLJoin
{
private:
public:
CPhysicalLeftAntiSemiNLJoin(const CPhysicalLeftAntiSemiNLJoin &) = delete;
// ctor
explicit CPhysicalLeftAntiSemiNLJoin(CMemoryPool *mp);
// dtor
~CPhysicalLeftAntiSemiNLJoin() override;
// ident accessors
EOperatorId
Eopid() const override
{
return EopPhysicalLeftAntiSemiNLJoin;
}
// return a string for operator name
const CHAR *
SzId() const override
{
return "CPhysicalLeftAntiSemiNLJoin";
}
// check if required columns are included in output columns
BOOL FProvidesReqdCols(CExpressionHandle &exprhdl, CColRefSet *pcrsRequired,
ULONG ulOptReq) const override;
// conversion function
static CPhysicalLeftAntiSemiNLJoin *
PopConvert(COperator *pop)
{
GPOS_ASSERT(EopPhysicalLeftAntiSemiNLJoin == pop->Eopid());
return dynamic_cast<CPhysicalLeftAntiSemiNLJoin *>(pop);
}
}; // class CPhysicalLeftAntiSemiNLJoin
} // namespace gpopt
#endif // !GPOPT_CPhysicalLeftAntiSemiNLJoin_H
// EOF
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