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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