greenplumn CDXLPhysicalSequence 源码
greenplumn CDXLPhysicalSequence 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLPhysicalSequence.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CDXLPhysicalSequence.h
//
// @doc:
// Class for representing DXL physical sequence operators
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLPhysicalSequence_H
#define GPDXL_CDXLPhysicalSequence_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLPhysical.h"
#include "naucrates/dxl/operators/CDXLSpoolInfo.h"
namespace gpdxl
{
//---------------------------------------------------------------------------
// @class:
// CDXLPhysicalSequence
//
// @doc:
// Class for representing DXL physical sequence operators
//
//---------------------------------------------------------------------------
class CDXLPhysicalSequence : public CDXLPhysical
{
private:
public:
CDXLPhysicalSequence(CDXLPhysicalSequence &) = delete;
// ctor
CDXLPhysicalSequence(CMemoryPool *mp);
// dtor
~CDXLPhysicalSequence() override;
// accessors
Edxlopid GetDXLOperator() const override;
const CWStringConst *GetOpNameStr() const override;
// serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const override;
// conversion function
static CDXLPhysicalSequence *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopPhysicalSequence == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLPhysicalSequence *>(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_CDXLPhysicalSequence_H
// EOF
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