greenplumn CXformLeftAntiSemiJoin2CrossProduct 源码
greenplumn CXformLeftAntiSemiJoin2CrossProduct 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformLeftAntiSemiJoin2CrossProduct.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2013 EMC Corp.
//
// @filename:
// CXformLeftAntiSemiJoin2CrossProduct.h
//
// @doc:
// Transform left anti semi join to cross product
//---------------------------------------------------------------------------
#ifndef GPOPT_CXformLeftAntiSemiJoin2CrossProduct_H
#define GPOPT_CXformLeftAntiSemiJoin2CrossProduct_H
#include "gpos/base.h"
#include "gpopt/xforms/CXformExploration.h"
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CXformLeftAntiSemiJoin2CrossProduct
//
// @doc:
// Transform left anti semi join to cross product
//
//---------------------------------------------------------------------------
class CXformLeftAntiSemiJoin2CrossProduct : public CXformExploration
{
private:
public:
CXformLeftAntiSemiJoin2CrossProduct(
const CXformLeftAntiSemiJoin2CrossProduct &) = delete;
// ctor
explicit CXformLeftAntiSemiJoin2CrossProduct(CMemoryPool *mp);
// ctor
explicit CXformLeftAntiSemiJoin2CrossProduct(CExpression *pexprPattern);
// dtor
~CXformLeftAntiSemiJoin2CrossProduct() override = default;
// ident accessors
EXformId
Exfid() const override
{
return ExfLeftAntiSemiJoin2CrossProduct;
}
// return a string for xform name
const CHAR *
SzId() const override
{
return "CXformLeftAntiSemiJoin2CrossProduct";
}
// compute xform promise for a given expression handle
EXformPromise Exfp(CExpressionHandle &exprhdl) const override;
// actual transform
void Transform(CXformContext *pxfctxt, CXformResult *pxfres,
CExpression *pexpr) const override;
}; // class CXformLeftAntiSemiJoin2CrossProduct
} // namespace gpopt
#endif // !GPOPT_CXformLeftAntiSemiJoin2CrossProduct_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
-
7、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦