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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