greenplumn CXformAntiSemiJoinNotInSemiJoinSwap 源码
greenplumn CXformAntiSemiJoinNotInSemiJoinSwap 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformAntiSemiJoinNotInSemiJoinSwap.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2013 EMC Corp.
//
// @filename:
// CXformAntiSemiJoinNotInSemiJoinSwap.h
//
// @doc:
// Swap cascaded anti semi-join (NotIn) and semi-join
//---------------------------------------------------------------------------
#ifndef GPOPT_CXformAntiSemiJoinNotInSemiJoinSwap_H
#define GPOPT_CXformAntiSemiJoinNotInSemiJoinSwap_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:
// CXformAntiSemiJoinNotInSemiJoinSwap
//
// @doc:
// Swap cascaded anti semi-join (NotIn) and semi-join
//
//---------------------------------------------------------------------------
class CXformAntiSemiJoinNotInSemiJoinSwap
: public CXformJoinSwap<CLogicalLeftAntiSemiJoinNotIn, CLogicalLeftSemiJoin>
{
private:
public:
CXformAntiSemiJoinNotInSemiJoinSwap(
const CXformAntiSemiJoinNotInSemiJoinSwap &) = delete;
// ctor
explicit CXformAntiSemiJoinNotInSemiJoinSwap(CMemoryPool *mp)
: CXformJoinSwap<CLogicalLeftAntiSemiJoinNotIn, CLogicalLeftSemiJoin>(
mp)
{
}
// dtor
~CXformAntiSemiJoinNotInSemiJoinSwap() override = default;
// Compatibility function
BOOL
FCompatible(CXform::EXformId exfid) override
{
return ExfSemiJoinAntiSemiJoinNotInSwap != exfid;
}
// ident accessors
EXformId
Exfid() const override
{
return ExfAntiSemiJoinNotInSemiJoinSwap;
}
const CHAR *
SzId() const override
{
return "CXformAntiSemiJoinNotInSemiJoinSwap";
}
}; // class CXformAntiSemiJoinNotInSemiJoinSwap
} // namespace gpopt
#endif // !GPOPT_CXformAntiSemiJoinNotInSemiJoinSwap_H
// EOF
相关信息
相关文章
greenplumn CJoinOrderGreedy 源码
greenplumn CJoinOrderMinCard 源码
greenplumn CSubqueryHandler 源码
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
6、 golang
-
7、 openharmony