greenplumn CDXLPhysicalMaterialize 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLPhysicalMaterialize.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2011 Greenplum, Inc.
/
/ @filename:
/ CDXLPhysicalMaterialize.h
/
/ @doc:
/ Class for representing DXL physical materialize operators.
/---------------------------------------------------------------------------
#ifndef GPDXL_CDXLPhysicalMaterialize_H
#define GPDXL_CDXLPhysicalMaterialize_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLPhysical.h"
#include "naucrates/dxl/operators/CDXLSpoolInfo.h"
namespace gpdxl
{
/ indices of materialize elements in the children array
enum Edxlmaterialize
{
EdxlmatIndexProjList = 0,
EdxlmatIndexFilter,
EdxlmatIndexChild,
EdxlmatIndexSentinel
};
/---------------------------------------------------------------------------
/ @class:
/ CDXLPhysicalMaterialize
/
/ @doc:
/ Class for representing DXL materialize operators
/
/---------------------------------------------------------------------------
class CDXLPhysicalMaterialize : public CDXLPhysical
{
private:
/ eager materialization
BOOL m_is_eager;
/ spool info
/ id of the spooling operator
ULONG m_spooling_op_id;
/ type of the underlying spool
Edxlspooltype m_spool_type;
/ slice executing the underlying sort or materialize
INT m_executor_slice;
/ number of consumers in case the materialize is a spooling operator
ULONG m_num_consumer_slices;
public:
CDXLPhysicalMaterialize(CDXLPhysicalMaterialize &) = delete;
/ ctor/dtor
CDXLPhysicalMaterialize(CMemoryPool *mp, BOOL is_eager);
CDXLPhysicalMaterialize(CMemoryPool *mp, BOOL is_eager,
ULONG spooling_op_id, INT executor_slice,
ULONG num_consumer_slices);
/ accessors
Edxlopid GetDXLOperator() const override;
const CWStringConst *GetOpNameStr() const override;
ULONG GetSpoolingOpId() const;
INT GetExecutorSlice() const;
ULONG GetNumConsumerSlices() const;
/ is the operator spooling to other operators
BOOL IsSpooling() const;
/ does the operator do eager materialization
BOOL IsEager() const;
/ serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *node) const override;
/ conversion function
static CDXLPhysicalMaterialize *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopPhysicalMaterialize == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLPhysicalMaterialize *>(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_CDXLPhysicalMaterialize_H
/ EOF
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