greenplumn CXformImplementation 源码
greenplumn CXformImplementation 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformImplementation.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2009 Greenplum, Inc.
//
// @filename:
// CXformImplementation.h
//
// @doc:
// Base class for implementation transforms
//---------------------------------------------------------------------------
#ifndef GPOPT_CXformImplementation_H
#define GPOPT_CXformImplementation_H
#include "gpos/base.h"
#include "gpopt/xforms/CXform.h"
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CXformImplementation
//
// @doc:
// base class for all implementations
//
//---------------------------------------------------------------------------
class CXformImplementation : public CXform
{
private:
public:
CXformImplementation(const CXformImplementation &) = delete;
// ctor
explicit CXformImplementation(CExpression *);
// dtor
~CXformImplementation() override;
// type of operator
BOOL
FImplementation() const override
{
GPOS_ASSERT(!FSubstitution() && !FExploration());
return true;
}
}; // class CXformImplementation
} // namespace gpopt
#endif // !GPOPT_CXformImplementation_H
// EOF
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