greenplumn CDXLPhysicalDynamicIndexScan 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLPhysicalDynamicIndexScan.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2013 EMC Corp.
/
/ @filename:
/ CDXLPhysicalDynamicIndexScan.h
/
/ @doc:
/ Class for representing DXL dynamic index scan operators
/---------------------------------------------------------------------------
#ifndef GPDXL_CDXLPhysicalDynamicIndexScan_H
#define GPDXL_CDXLPhysicalDynamicIndexScan_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLIndexDescr.h"
#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/operators/CDXLPhysical.h"
#include "naucrates/dxl/operators/CDXLTableDescr.h"
namespace gpdxl
{
/---------------------------------------------------------------------------
/ @class:
/ CDXLPhysicalDynamicIndexScan
/
/ @doc:
/ Class for representing DXL dynamic index scan operators
/
/---------------------------------------------------------------------------
class CDXLPhysicalDynamicIndexScan : public CDXLPhysical
{
private:
/ table descriptor for the scanned table
CDXLTableDescr *m_dxl_table_descr;
/ index descriptor associated with the scanned table
CDXLIndexDescr *m_dxl_index_descr;
/ scan direction of the index
EdxlIndexScanDirection m_index_scan_dir;
IMdIdArray *m_part_mdids;
ULongPtrArray *m_selector_ids = nullptr;
public:
CDXLPhysicalDynamicIndexScan(CDXLPhysicalDynamicIndexScan &) = delete;
/ indices of dynamic index scan elements in the children array
enum Edxldis
{
EdxldisIndexProjList = 0,
EdxldisIndexFilter,
EdxldisIndexCondition,
EdxldisSentinel
};
/ctor
CDXLPhysicalDynamicIndexScan(CMemoryPool *mp, CDXLTableDescr *table_descr,
CDXLIndexDescr *dxl_index_descr,
EdxlIndexScanDirection idx_scan_direction,
IMdIdArray *part_mdids,
ULongPtrArray *selector_ids);
/dtor
~CDXLPhysicalDynamicIndexScan() override;
/ operator type
Edxlopid GetDXLOperator() const override;
/ operator name
const CWStringConst *GetOpNameStr() const override;
/ index descriptor
const CDXLIndexDescr *GetDXLIndexDescr() const;
/table descriptor
const CDXLTableDescr *GetDXLTableDescr() const;
/ scan direction
EdxlIndexScanDirection GetIndexScanDir() 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 CDXLPhysicalDynamicIndexScan *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopPhysicalDynamicIndexScan == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLPhysicalDynamicIndexScan *>(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_CDXLPhysicalDynamicIndexScan_H
/ EOF
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