greenplumn CDXLWindowKey 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLWindowKey.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CDXLWindowKey.h
/
/ @doc:
/ Class for representing DXL window key
/---------------------------------------------------------------------------
#ifndef GPDXL_CDXLWindowKey_H
#define GPDXL_CDXLWindowKey_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLWindowFrame.h"
namespace gpdxl
{
using namespace gpos;
/---------------------------------------------------------------------------
/ @class:
/ CDXLWindowKey
/
/ @doc:
/ Class for representing DXL window key
/
/---------------------------------------------------------------------------
class CDXLWindowKey : public CRefCount
{
private:
/ window frame associated with the window key
CDXLWindowFrame *m_window_frame_dxl{nullptr};
/ sorting columns
CDXLNode *m_sort_col_list_dxlnode{nullptr};
public:
CDXLWindowKey(const CDXLWindowKey &) = delete;
/ ctor
CDXLWindowKey();
/ dtor
~CDXLWindowKey() override;
/ serialize operator in DXL format
virtual void SerializeToDXL(CXMLSerializer *) const;
/ set window frame definition
void SetWindowFrame(CDXLWindowFrame *window_frame);
/ return window frame
CDXLWindowFrame *
GetWindowFrame() const
{
return m_window_frame_dxl;
}
/ set the list of sort columns
void SetSortColList(CDXLNode *sort_col_list_dxlnode);
/ sort columns
CDXLNode *
GetSortColListDXL() const
{
return m_sort_col_list_dxlnode;
}
};
using CDXLWindowKeyArray = CDynamicPtrArray<CDXLWindowKey, CleanupRelease>;
} / namespace gpdxl
#endif / !GPDXL_CDXLWindowKey_H
/ EOF
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