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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