greenplumn CWindowOids 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/base/CWindowOids.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2017 VMware, Inc. or its affiliates.
/
/ @filename:
/ CWindowOids.h
/
/ @doc:
/ System specific oids for window operations
/---------------------------------------------------------------------------
#ifndef GPOPT_CWindowOids_H
#define GPOPT_CWindowOids_H
#include "gpos/common/CRefCount.h"
#include "naucrates/dxl/gpdb_types.h"
#define DUMMY_ROW_NUMBER_OID OID(7000)
#define DUMMY_WIN_RANK OID(7001)
namespace gpopt
{
/---------------------------------------------------------------------------
/ @class:
/ CWindowOids
/
/ @doc:
/ GPDB specific oids
/
/---------------------------------------------------------------------------
class CWindowOids : public CRefCount
{
private:
/ oid of window operation "row_number" function
OID m_oidRowNumber;
/ oid of window operation "rank" function
OID m_oidRank;
public:
CWindowOids(OID row_number_oid, OID rank_oid);
/ accessor of oid value of "row_number" function
OID OidRowNumber() const;
/ accessor of oid value of "rank" function
OID OidRank() const;
/ generate default window oids
static CWindowOids *GetWindowOids(CMemoryPool *mp);
}; / class CWindowOids
} / namespace gpopt
#endif / !GPOPT_CWindowOids_H
/ EOF
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