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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