greenplumn CDXLLogicalWindow 源码
greenplumn CDXLLogicalWindow 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLLogicalWindow.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CDXLLogicalWindow.h
//
// @doc:
// Class for representing DXL logical window operators
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLLogicalWindow_H
#define GPDXL_CDXLLogicalWindow_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLLogical.h"
#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/operators/CDXLWindowSpec.h"
namespace gpdxl
{
//---------------------------------------------------------------------------
// @class:
// CDXLLogicalWindow
//
// @doc:
// Class for representing DXL logical window operators
//
//---------------------------------------------------------------------------
class CDXLLogicalWindow : public CDXLLogical
{
private:
// array of window specifications
CDXLWindowSpecArray *m_window_spec_array;
// private copy ctor
CDXLLogicalWindow(CDXLLogicalWindow &);
public:
//ctor
CDXLLogicalWindow(CMemoryPool *mp, CDXLWindowSpecArray *pdrgpdxlwinspec);
//dtor
~CDXLLogicalWindow() override;
// accessors
Edxlopid GetDXLOperator() const override;
const CWStringConst *GetOpNameStr() const override;
// number of window specs
ULONG NumOfWindowSpecs() const;
// return the window key at a given position
CDXLWindowSpec *GetWindowKeyAt(ULONG idx) const;
// serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *node) const override;
// conversion function
static CDXLLogicalWindow *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopLogicalWindow == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLLogicalWindow *>(dxl_op);
}
#ifdef GPOS_DEBUG
// checks whether the operator has valid structure, i.e. number and
// types of child nodes
void AssertValid(const CDXLNode *, BOOL validate_children) const override;
#endif // GPOS_DEBUG
};
} // namespace gpdxl
#endif // !GPDXL_CDXLLogicalWindow_H
// EOF
相关信息
相关文章
greenplumn CDXLCtasStorageOptions 源码
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
7、 golang
-
9、 openharmony