greenplumn CDXLPhysicalPartitionSelector 源码
greenplumn CDXLPhysicalPartitionSelector 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLPhysicalPartitionSelector.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2014 VMware, Inc. or its affiliates.
//
// @filename:
// CDXLPhysicalPartitionSelector.h
//
// @doc:
// Class for representing DXL partition selector
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLPhysicalPartitionSelector_H
#define GPDXL_CDXLPhysicalPartitionSelector_H
#include "gpos/base.h"
#include "gpos/common/CBitSet.h"
#include "naucrates/dxl/operators/CDXLPhysical.h"
namespace gpdxl
{
// indices of partition selector elements in the children array
enum Edxlps
{
EdxlpsIndexProjList = 0,
EdxlpsIndexEqFilters,
EdxlpsIndexFilters,
EdxlpsIndexResidualFilter,
EdxlpsIndexPropExpr,
EdxlpsIndexPrintableFilter,
EdxlpsIndexChild,
EdxlpsIndexSentinel
};
//---------------------------------------------------------------------------
// @class:
// CDXLPhysicalPartitionSelector
//
// @doc:
// Class for representing DXL partition selector
//
//---------------------------------------------------------------------------
class CDXLPhysicalPartitionSelector : public CDXLPhysical
{
private:
// table id
IMDId *m_rel_mdid;
// selector id
ULONG m_selector_id;
// scan id
ULONG m_scan_id;
ULongPtrArray *m_parts;
public:
CDXLPhysicalPartitionSelector(CDXLPhysicalPartitionSelector &) = delete;
// ctor
CDXLPhysicalPartitionSelector(CMemoryPool *mp, IMDId *mdid_rel,
ULONG selector_id, ULONG scan_id,
ULongPtrArray *parts);
// dtor
~CDXLPhysicalPartitionSelector() override;
// operator type
Edxlopid GetDXLOperator() const override;
// operator name
const CWStringConst *GetOpNameStr() const override;
// table id
IMDId *
GetRelMdId() const
{
return m_rel_mdid;
}
// number of partitioning levels
ULONG
SelectorId() const
{
return m_selector_id;
}
// scan id
ULONG
ScanId() const
{
return m_scan_id;
}
ULongPtrArray *
Partitions() const
{
return m_parts;
}
// serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const override;
#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
// conversion function
static CDXLPhysicalPartitionSelector *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopPhysicalPartitionSelector ==
dxl_op->GetDXLOperator());
return dynamic_cast<CDXLPhysicalPartitionSelector *>(dxl_op);
}
};
} // namespace gpdxl
#endif // !GPDXL_CDXLPhysicalPartitionSelector_H
// EOF
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