greenplumn CDXLPhysicalMaterialize 源码
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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