greenplumn CXformSemiJoinInnerJoinSwap 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformSemiJoinInnerJoinSwap.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CXformSemiJoinInnerJoinSwap.h
/
/ @doc:
/ Swap cascaded semi-join and inner join
/---------------------------------------------------------------------------
#ifndef GPOPT_CXformSemiJoinInnerJoinSwap_H
#define GPOPT_CXformSemiJoinInnerJoinSwap_H
#include "gpos/base.h"
#include "gpopt/operators/CLogicalInnerJoin.h"
#include "gpopt/operators/CLogicalLeftSemiJoin.h"
#include "gpopt/xforms/CXformJoinSwap.h"
namespace gpopt
{
using namespace gpos;
/---------------------------------------------------------------------------
/ @class:
/ CXformSemiJoinInnerJoinSwap
/
/ @doc:
/ Swap cascaded semi-join and inner join
/
/---------------------------------------------------------------------------
class CXformSemiJoinInnerJoinSwap
: public CXformJoinSwap<CLogicalLeftSemiJoin, CLogicalInnerJoin>
{
private:
public:
CXformSemiJoinInnerJoinSwap(const CXformSemiJoinInnerJoinSwap &) = delete;
/ ctor
explicit CXformSemiJoinInnerJoinSwap(CMemoryPool *mp)
: CXformJoinSwap<CLogicalLeftSemiJoin, CLogicalInnerJoin>(mp)
{
}
/ dtor
~CXformSemiJoinInnerJoinSwap() override = default;
/ ident accessors
EXformId
Exfid() const override
{
return ExfSemiJoinInnerJoinSwap;
}
const CHAR *
SzId() const override
{
return "CXformSemiJoinInnerJoinSwap";
}
}; / class CXformSemiJoinInnerJoinSwap
} / namespace gpopt
#endif / !GPOPT_CXformSemiJoinInnerJoinSwap_H
/ EOF
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