greenplumn CDXLWindowKey 源码
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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