greenplumn CDXLWindowSpec 源码
greenplumn CDXLWindowSpec 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLWindowSpec.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CDXLWindowSpec.h
//
// @doc:
// Class for representing DXL window specification in the DXL
// representation of the logical query tree
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLWindowSpec_H
#define GPDXL_CDXLWindowSpec_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/operators/CDXLWindowFrame.h"
#include "naucrates/md/CMDName.h"
namespace gpdxl
{
using namespace gpos;
using namespace gpmd;
//---------------------------------------------------------------------------
// @class:
// CDXLWindowSpec
//
// @doc:
// Class for representing DXL window specification in the DXL
// representation of the logical query tree
//
//---------------------------------------------------------------------------
class CDXLWindowSpec : public CRefCount
{
private:
// memory pool;
CMemoryPool *m_mp;
// partition-by column identifiers
ULongPtrArray *m_partition_by_colid_array;
// name of window specification
CMDName *m_mdname;
// sorting columns
CDXLNode *m_sort_col_list_dxlnode;
// window frame associated with the window key
CDXLWindowFrame *m_window_frame;
// private copy ctor
CDXLWindowSpec(const CDXLWindowSpec &);
public:
// ctor
CDXLWindowSpec(CMemoryPool *mp, ULongPtrArray *partition_by_colid_array,
CMDName *mdname, CDXLNode *sort_col_list_dxlnode,
CDXLWindowFrame *window_frame);
// dtor
~CDXLWindowSpec() 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;
}
// partition-by column identifiers
ULongPtrArray *
GetPartitionByColIdArray() const
{
return m_partition_by_colid_array;
}
// sort columns
CDXLNode *
GetSortColListDXL() const
{
return m_sort_col_list_dxlnode;
}
// window specification name
CMDName *
MdName() const
{
return m_mdname;
}
};
using CDXLWindowSpecArray = CDynamicPtrArray<CDXLWindowSpec, CleanupRelease>;
} // namespace gpdxl
#endif // !GPDXL_CDXLWindowSpec_H
// EOF
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