greenplumn CXformProject2Apply 源码
greenplumn CXformProject2Apply 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformProject2Apply.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CXformProject2Apply.h
//
// @doc:
// Transform Project to Apply
//---------------------------------------------------------------------------
#ifndef GPOPT_CXformProject2Apply_H
#define GPOPT_CXformProject2Apply_H
#include "gpos/base.h"
#include "gpopt/xforms/CXformSubqueryUnnest.h"
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CXformProject2Apply
//
// @doc:
// Transform Project to Apply; this transformation is only applicable
// to a Project expression with subqueries in its scalar project list
//
//---------------------------------------------------------------------------
class CXformProject2Apply : public CXformSubqueryUnnest
{
private:
public:
CXformProject2Apply(const CXformProject2Apply &) = delete;
// ctor
explicit CXformProject2Apply(CMemoryPool *mp);
// dtor
~CXformProject2Apply() override = default;
// ident accessors
EXformId
Exfid() const override
{
return ExfProject2Apply;
}
// return a string for xform name
const CHAR *
SzId() const override
{
return "CXformProject2Apply";
}
}; // class CXformProject2Apply
} // namespace gpopt
#endif // !GPOPT_CXformProject2Apply_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