greenplumn CDXLTableDescr 源码
greenplumn CDXLTableDescr 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLTableDescr.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2010 Greenplum, Inc.
//
// @filename:
// CDXLTableDescr.h
//
// @doc:
// Class for representing table descriptors.
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLTableDescriptor_H
#define GPDXL_CDXLTableDescriptor_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLColDescr.h"
#include "naucrates/md/CMDName.h"
#include "naucrates/md/IMDId.h"
namespace gpdxl
{
using namespace gpmd;
//---------------------------------------------------------------------------
// @class:
// CDXLTableDescr
//
// @doc:
// Class for representing table descriptors in a DXL tablescan node.
//
//---------------------------------------------------------------------------
class CDXLTableDescr : public CRefCount
{
private:
// id and version information for the table
IMDId *m_mdid;
// table name
CMDName *m_mdname;
// list of column descriptors
CDXLColDescrArray *m_dxl_column_descr_array;
// id of user the table needs to be accessed with
ULONG m_execute_as_user_id;
// lock mode from the parser
INT m_lockmode;
void SerializeMDId(CXMLSerializer *xml_serializer) const;
public:
CDXLTableDescr(const CDXLTableDescr &) = delete;
// ctor/dtor
CDXLTableDescr(CMemoryPool *mp, IMDId *mdid, CMDName *mdname,
ULONG ulExecuteAsUser, int lockmode);
~CDXLTableDescr() override;
// setters
void SetColumnDescriptors(CDXLColDescrArray *dxl_column_descr_array);
void AddColumnDescr(CDXLColDescr *pdxlcd);
// table name
const CMDName *MdName() const;
// table mdid
IMDId *MDId() const;
// table arity
ULONG Arity() const;
// user id
ULONG GetExecuteAsUserId() const;
// lock mode
INT LockMode() const;
// get the column descriptor at the given position
const CDXLColDescr *GetColumnDescrAt(ULONG idx) const;
// serialize to dxl format
void SerializeToDXL(CXMLSerializer *xml_serializer) const;
};
} // namespace gpdxl
#endif // !GPDXL_CDXLTableDescriptor_H
// EOF
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