greenplumn CDXLPhysicalRandomMotion 源码
greenplumn CDXLPhysicalRandomMotion 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLPhysicalRandomMotion.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CDXLPhysicalRandomMotion.h
//
// @doc:
// Class for representing DXL random motion operators.
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLPhysicalRandomMotion_H
#define GPDXL_CDXLPhysicalRandomMotion_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLPhysicalMotion.h"
namespace gpdxl
{
// indexes of random motion elements in the children array
enum Edxlrandomm
{
EdxlrandommIndexProjList = 0,
EdxlrandommIndexFilter,
EdxlrandommIndexSortColList,
EdxlrandommIndexChild,
EdxlrandommIndexSentinel
};
//---------------------------------------------------------------------------
// @class:
// CDXLPhysicalRandomMotion
//
// @doc:
// Class for representing DXL random motion operators
//
//---------------------------------------------------------------------------
class CDXLPhysicalRandomMotion : public CDXLPhysicalMotion
{
private:
// is distribution duplicate sensitive
BOOL m_is_duplicate_sensitive;
public:
CDXLPhysicalRandomMotion(const CDXLPhysicalRandomMotion &) = delete;
// ctor
CDXLPhysicalRandomMotion(CMemoryPool *mp, BOOL is_duplicate_sensitive);
// accessors
Edxlopid GetDXLOperator() const override;
const CWStringConst *GetOpNameStr() const override;
// is operator duplicate sensitive
BOOL
IsDuplicateSensitive() const
{
return m_is_duplicate_sensitive;
}
// index of relational child node in the children array
ULONG
GetRelationChildIdx() const override
{
return EdxlrandommIndexChild;
}
// serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const override;
// conversion function
static CDXLPhysicalRandomMotion *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopPhysicalMotionRandom == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLPhysicalRandomMotion *>(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_CDXLPhysicalRandomMotion_H
// EOF
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