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