greenplumn CDXLScalarArrayRefIndexList 源码
greenplumn CDXLScalarArrayRefIndexList 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLScalarArrayRefIndexList.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2014 VMware, Inc. or its affiliates.
//
// @filename:
// CDXLScalarArrayRefIndexList.h
//
// @doc:
// Class for representing DXL scalar arrayref index list
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLScalarArrayRefIndexList_H
#define GPDXL_CDXLScalarArrayRefIndexList_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLScalar.h"
#include "naucrates/md/IMDId.h"
namespace gpdxl
{
using namespace gpmd;
//---------------------------------------------------------------------------
// @class:
// CDXLScalarArrayRefIndexList
//
// @doc:
// Class for representing DXL scalar arrayref index list
//
//---------------------------------------------------------------------------
class CDXLScalarArrayRefIndexList : public CDXLScalar
{
public:
enum EIndexListBound
{
EilbLower, // lower index
EilbUpper, // upper index
EilbSentinel
};
private:
// index list bound
EIndexListBound m_index_list_bound;
// string representation of index list bound
static const CWStringConst *GetDXLIndexListBoundStr(
EIndexListBound index_list_bound);
public:
CDXLScalarArrayRefIndexList(const CDXLScalarArrayRefIndexList &) = delete;
// ctor
CDXLScalarArrayRefIndexList(CMemoryPool *mp,
EIndexListBound index_list_bound);
// ident accessors
Edxlopid GetDXLOperator() const override;
// operator name
const CWStringConst *GetOpNameStr() const override;
// index list bound
EIndexListBound
GetDXLIndexListBound() const
{
return m_index_list_bound;
}
// serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const override;
// does the operator return a boolean result
BOOL
HasBoolResult(CMDAccessor * //md_accessor
) const override
{
return false;
}
#ifdef GPOS_DEBUG
// checks whether the operator has valid structure, i.e. number and
// types of child nodes
void AssertValid(const CDXLNode *dxlnode,
BOOL validate_children) const override;
#endif // GPOS_DEBUG
// conversion function
static CDXLScalarArrayRefIndexList *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopScalarArrayRefIndexList == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLScalarArrayRefIndexList *>(dxl_op);
}
};
} // namespace gpdxl
#endif // !GPDXL_CDXLScalarArrayRefIndexList_H
// EOF
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