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