greenplumn CDXLPhysicalValuesScan 源码
greenplumn CDXLPhysicalValuesScan 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLPhysicalValuesScan.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2017 VMware, Inc. or its affiliates.
//
// @filename:
// CDXLPhysicalValuesScan.h
//
// @doc:
// Class for representing DXL physical Values scan
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLPhysicalValuesScan_H
#define GPDXL_CDXLPhysicalValuesScan_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLPhysical.h"
namespace gpdxl
{
enum EdxlnVal
{
EdxlValIndexProjList = 0,
EdxlValIndexConstStart,
EdxlValIndexSentinel
};
// class for representing DXL physical Values scan
class CDXLPhysicalValuesScan : public CDXLPhysical
{
private:
public:
CDXLPhysicalValuesScan(CDXLPhysicalValuesScan &) = delete;
// ctor
CDXLPhysicalValuesScan(CMemoryPool *mp);
// dtor
~CDXLPhysicalValuesScan() override;
// get operator type
Edxlopid GetDXLOperator() const override;
// get operator name
const CWStringConst *GetOpNameStr() const override;
// serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const override;
// conversion function
static CDXLPhysicalValuesScan *Cast(CDXLOperator *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_CDXLPhysicalValuesScan_H
// EOF
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