greenplumn CDXLPhysicalResult 源码
greenplumn CDXLPhysicalResult 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLPhysicalResult.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2011 Greenplum, Inc.
//
// @filename:
// CDXLPhysicalResult.h
//
// @doc:
// Class for representing DXL physical result operators.
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLPhysicalResult_H
#define GPDXL_CDXLPhysicalResult_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLPhysical.h"
namespace gpdxl
{
// indices of result elements in the children array
enum Edxlresult
{
EdxlresultIndexProjList = 0,
EdxlresultIndexFilter,
EdxlresultIndexOneTimeFilter,
EdxlresultIndexChild,
EdxlresultIndexSentinel
};
//---------------------------------------------------------------------------
// @class:
// CDXLPhysicalResult
//
// @doc:
// Class for representing DXL result operators
//
//---------------------------------------------------------------------------
class CDXLPhysicalResult : public CDXLPhysical
{
private:
public:
CDXLPhysicalResult(CDXLPhysicalResult &) = delete;
// ctor/dtor
explicit CDXLPhysicalResult(CMemoryPool *mp);
// 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 CDXLPhysicalResult *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopPhysicalResult == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLPhysicalResult *>(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_CDXLPhysicalResult_H
// EOF
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