greenplumn CColRefSetIter 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/base/CColRefSetIter.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2009 Greenplum, Inc.
/
/ @filename:
/ CColRefSetIter.h
/
/ @doc:
/ Implementation of iterator for column ref sets
/---------------------------------------------------------------------------
#ifndef GPOS_CColRefSetIter_H
#define GPOS_CColRefSetIter_H
#include "gpos/base.h"
#include "gpos/common/CBitSetIter.h"
#include "gpopt/base/CColRefSet.h"
namespace gpopt
{
/ fwd declarations
class CColumnFactory;
/---------------------------------------------------------------------------
/ @class:
/ CColRefSetIter
/
/ @doc:
/ Iterator for colref set's; defined as friend, ie can access colrefset's
/ internal links
/
/---------------------------------------------------------------------------
class CColRefSetIter : public CBitSetIter
{
private:
/ a copy of the pointer to column factory, obtained at construction time
CColumnFactory *m_pcf;
/ private copy ctor
CColRefSetIter(const CColRefSetIter &);
/ current bit -- private to make super class' inaccessible
ULONG UlBit() const;
public:
/ ctor
explicit CColRefSetIter(const CColRefSet &bs);
/ dtor
~CColRefSetIter() = default;
/ current colref
CColRef *Pcr() const;
}; / class CColRefSetIter
} / namespace gpopt
#endif / !GPOS_CColRefSetIter_H
/ EOF
相关信息
相关文章
greenplumn CColConstraintsArrayMapper 源码