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
相关信息
相关文章
greenplumn CDXLCtasStorageOptions 源码