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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