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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