greenplumn CDXLPhysicalRoutedDistributeMotion 源码
greenplumn CDXLPhysicalRoutedDistributeMotion 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLPhysicalRoutedDistributeMotion.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CDXLPhysicalRoutedDistributeMotion.h
//
// @doc:
// Class for representing DXL routed redistribute motion operators.
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLPhysicalRoutedDistributeMotion_H
#define GPDXL_CDXLPhysicalRoutedDistributeMotion_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLPhysicalMotion.h"
namespace gpdxl
{
//---------------------------------------------------------------------------
// @class:
// CDXLPhysicalRoutedDistributeMotion
//
// @doc:
// Class for representing DXL routed redistribute motion operators
//
//---------------------------------------------------------------------------
class CDXLPhysicalRoutedDistributeMotion : public CDXLPhysicalMotion
{
private:
// indexes of the routed motion elements in the children array
enum Edxlroutedm
{
EdxlroutedmIndexProjList = 0,
EdxlroutedmIndexFilter,
EdxlroutedmIndexSortColList,
EdxlroutedmIndexChild,
EdxlroutedmIndexSentinel
};
// segment id column
ULONG m_segment_id_col;
public:
CDXLPhysicalRoutedDistributeMotion(
const CDXLPhysicalRoutedDistributeMotion &) = delete;
// ctor
CDXLPhysicalRoutedDistributeMotion(CMemoryPool *mp, ULONG segment_id_col);
// operator type
Edxlopid GetDXLOperator() const override;
// operator name
const CWStringConst *GetOpNameStr() const override;
// segment id column
ULONG
SegmentIdCol() const
{
return m_segment_id_col;
}
// index of relational child node in the children array
ULONG
GetRelationChildIdx() const override
{
return EdxlroutedmIndexChild;
}
// serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const override;
// conversion function
static CDXLPhysicalRoutedDistributeMotion *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopPhysicalMotionRoutedDistribute ==
dxl_op->GetDXLOperator());
return dynamic_cast<CDXLPhysicalRoutedDistributeMotion *>(dxl_op);
}
#ifdef GPOS_DEBUG
// checks whether the operator has valid structure, i.e. number and
// types of child nodes
void AssertValid(const CDXLNode *dxlnode,
BOOL validate_children) const override;
#endif // GPOS_DEBUG
};
} // namespace gpdxl
#endif // !GPDXL_CDXLPhysicalRoutedDistributeMotion_H
// EOF
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