greenplumn CXformAntiSemiJoinAntiSemiJoinNotInSwap 源码
greenplumn CXformAntiSemiJoinAntiSemiJoinNotInSwap 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformAntiSemiJoinAntiSemiJoinNotInSwap.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2013 EMC Corp.
//
// @filename:
// CXformAntiSemiJoinAntiSemiJoinNotInSwap.h
//
// @doc:
// Swap cascaded anti semi-join and anti semi-join (NotIn)
//---------------------------------------------------------------------------
#ifndef GPOPT_CXformAntiSemiJoinAntiSemiJoinNotInSwap_H
#define GPOPT_CXformAntiSemiJoinAntiSemiJoinNotInSwap_H
#include "gpos/base.h"
#include "gpopt/operators/CLogicalLeftAntiSemiJoin.h"
#include "gpopt/operators/CLogicalLeftAntiSemiJoinNotIn.h"
#include "gpopt/xforms/CXformJoinSwap.h"
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CXformAntiSemiJoinAntiSemiJoinNotInSwap
//
// @doc:
// Swap cascaded anti semi-join and anti semi-join (NotIn)
//
//---------------------------------------------------------------------------
class CXformAntiSemiJoinAntiSemiJoinNotInSwap
: public CXformJoinSwap<CLogicalLeftAntiSemiJoin,
CLogicalLeftAntiSemiJoinNotIn>
{
private:
public:
CXformAntiSemiJoinAntiSemiJoinNotInSwap(
const CXformAntiSemiJoinAntiSemiJoinNotInSwap &) = delete;
// ctor
explicit CXformAntiSemiJoinAntiSemiJoinNotInSwap(CMemoryPool *mp)
: CXformJoinSwap<CLogicalLeftAntiSemiJoin,
CLogicalLeftAntiSemiJoinNotIn>(mp)
{
}
// dtor
~CXformAntiSemiJoinAntiSemiJoinNotInSwap() override = default;
// compatibility function
BOOL
FCompatible(CXform::EXformId exfid) override
{
return ExfAntiSemiJoinNotInAntiSemiJoinSwap != exfid;
}
// ident accessors
EXformId
Exfid() const override
{
return ExfAntiSemiJoinAntiSemiJoinNotInSwap;
}
const CHAR *
SzId() const override
{
return "CXformAntiSemiJoinAntiSemiJoinNotInSwap";
}
}; // class CXformAntiSemiJoinAntiSemiJoinNotInSwap
} // namespace gpopt
#endif // !GPOPT_CXformAntiSemiJoinAntiSemiJoinNotInSwap_H
// EOF
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