greenplumn CDXLPhysicalIndexOnlyScan 源码
greenplumn CDXLPhysicalIndexOnlyScan 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLPhysicalIndexOnlyScan.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CDXLPhysicalIndexOnlyScan.h
//
// @doc:
// Class for representing DXL index only scan operators
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLPhysicalIndexOnlyScan_H
#define GPDXL_CDXLPhysicalIndexOnlyScan_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLIndexDescr.h"
#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/operators/CDXLPhysicalIndexScan.h"
#include "naucrates/dxl/operators/CDXLTableDescr.h"
namespace gpdxl
{
//---------------------------------------------------------------------------
// @class:
// CDXLPhysicalIndexOnlyScan
//
// @doc:
// Class for representing DXL index only scan operators
//
//---------------------------------------------------------------------------
class CDXLPhysicalIndexOnlyScan : public CDXLPhysicalIndexScan
{
private:
public:
CDXLPhysicalIndexOnlyScan(CDXLPhysicalIndexOnlyScan &) = delete;
//ctor
CDXLPhysicalIndexOnlyScan(CMemoryPool *mp, CDXLTableDescr *table_descr,
CDXLIndexDescr *dxl_index_descr,
EdxlIndexScanDirection idx_scan_direction);
//dtor
~CDXLPhysicalIndexOnlyScan() override = default;
// operator type
Edxlopid GetDXLOperator() const override;
// operator name
const CWStringConst *GetOpNameStr() const override;
// conversion function
static CDXLPhysicalIndexOnlyScan *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopPhysicalIndexOnlyScan == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLPhysicalIndexOnlyScan *>(dxl_op);
}
};
} // namespace gpdxl
#endif // !GPDXL_CDXLPhysicalIndexOnlyScan_H
// EOF
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