greenplumn CDXLPhysicalExternalScan 源码
greenplumn CDXLPhysicalExternalScan 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLPhysicalExternalScan.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2013 VMware, Inc. or its affiliates.
//
// @filename:
// CDXLPhysicalExternalScan.h
//
// @doc:
// Class for representing DXL external scan operators
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLPhysicalExternalScan_H
#define GPDXL_CDXLPhysicalExternalScan_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLPhysicalTableScan.h"
#include "naucrates/dxl/operators/CDXLTableDescr.h"
namespace gpdxl
{
//---------------------------------------------------------------------------
// @class:
// CDXLPhysicalExternalScan
//
// @doc:
// Class for representing DXL external scan operators
//
//---------------------------------------------------------------------------
class CDXLPhysicalExternalScan : public CDXLPhysicalTableScan
{
private:
public:
CDXLPhysicalExternalScan(CDXLPhysicalExternalScan &) = delete;
// ctors
explicit CDXLPhysicalExternalScan(CMemoryPool *mp);
CDXLPhysicalExternalScan(CMemoryPool *mp, CDXLTableDescr *table_descr);
// operator type
Edxlopid GetDXLOperator() const override;
// operator name
const CWStringConst *GetOpNameStr() const override;
// conversion function
static CDXLPhysicalExternalScan *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopPhysicalExternalScan == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLPhysicalExternalScan *>(dxl_op);
}
};
} // namespace gpdxl
#endif // !GPDXL_CDXLPhysicalExternalScan_H
// EOF
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