greenplumn CDXLPhysicalGatherMotion 源码
greenplumn CDXLPhysicalGatherMotion 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLPhysicalGatherMotion.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2010 Greenplum, Inc.
//
// @filename:
// CDXLPhysicalGatherMotion.h
//
// @doc:
// Class for representing DXL Gather motion operators.
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLPhysicalGatherMotion_H
#define GPDXL_CDXLPhysicalGatherMotion_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLPhysicalMotion.h"
namespace gpdxl
{
// indices of gather motion elements in the children array
enum Edxlgm
{
EdxlgmIndexProjList = 0,
EdxlgmIndexFilter,
EdxlgmIndexSortColList,
EdxlgmIndexChild,
EdxlgmIndexSentinel
};
//---------------------------------------------------------------------------
// @class:
// CDXLPhysicalGatherMotion
//
// @doc:
// Class for representing DXL gather motion operators
//
//---------------------------------------------------------------------------
class CDXLPhysicalGatherMotion : public CDXLPhysicalMotion
{
private:
public:
CDXLPhysicalGatherMotion(const CDXLPhysicalGatherMotion &) = delete;
// ctor/dtor
CDXLPhysicalGatherMotion(CMemoryPool *mp);
~CDXLPhysicalGatherMotion() override = default;
// accessors
Edxlopid GetDXLOperator() const override;
const CWStringConst *GetOpNameStr() const override;
INT IOutputSegIdx() const;
// index of relational child node in the children array
ULONG
GetRelationChildIdx() const override
{
return EdxlgmIndexChild;
}
// serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *node) const override;
// conversion function
static CDXLPhysicalGatherMotion *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopPhysicalMotionGather == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLPhysicalGatherMotion *>(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_CDXLPhysicalGatherMotion_H
// EOF
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