greenplumn CDXLPhysicalDynamicTableScan 源码
greenplumn CDXLPhysicalDynamicTableScan 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLPhysicalDynamicTableScan.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CDXLPhysicalDynamicTableScan.h
//
// @doc:
// Class for representing DXL dynamic table scan operators
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLPhysicalDynamicTableScan_H
#define GPDXL_CDXLPhysicalDynamicTableScan_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLPhysical.h"
#include "naucrates/dxl/operators/CDXLTableDescr.h"
namespace gpdxl
{
// indices of dynamic table scan elements in the children array
enum Edxldts
{
EdxldtsIndexProjList = 0,
EdxldtsIndexFilter,
EdxldtsSentinel
};
//---------------------------------------------------------------------------
// @class:
// CDXLPhysicalDynamicTableScan
//
// @doc:
// Class for representing DXL dynamic table scan operators
//
//---------------------------------------------------------------------------
class CDXLPhysicalDynamicTableScan : public CDXLPhysical
{
private:
// table descriptor for the scanned table
CDXLTableDescr *m_dxl_table_descr;
IMdIdArray *m_part_mdids;
ULongPtrArray *m_selector_ids = nullptr;
public:
CDXLPhysicalDynamicTableScan(CDXLPhysicalDynamicTableScan &) = delete;
// ctor
CDXLPhysicalDynamicTableScan(CMemoryPool *mp, CDXLTableDescr *table_descr,
IMdIdArray *part_mdids,
ULongPtrArray *selector_ids);
// dtor
~CDXLPhysicalDynamicTableScan() override;
// operator type
Edxlopid GetDXLOperator() const override;
// operator name
const CWStringConst *GetOpNameStr() const override;
// table descriptor
const CDXLTableDescr *GetDXLTableDescr() const;
IMdIdArray *GetParts() const;
const ULongPtrArray *
GetSelectorIds() const
{
return m_selector_ids;
}
// serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *node) const override;
// conversion function
static CDXLPhysicalDynamicTableScan *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopPhysicalDynamicTableScan == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLPhysicalDynamicTableScan *>(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_CDXLPhysicalDynamicTableScan_H
// EOF
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