利用 TSQLCA_Index 对dbio进行索引，在 vr.cpp里有例子。        TSQLCA_Index idx;        idx.Build(data);        int search_rid,int_vid,rec_int_vid;      int keep_pos;      wchar_t * wval;        for(id=0;id<*dbio_attr.mRowCount;id++)      {        dbio_attr.GetRes(0,attr_vid);          if(!idx.Search_First(attr_vid,&search_rid,&keep_pos))        {          dbio_attr.Next();          continue;        };          data->Go_Row(search_rid);        sprintf(col_name,"%s",dbio_attr.GetRes(1));        if(data->GetFieldId(col_name,&fid))        {          while(1)          {            data->SetValue(fid,dbio_attr.GetRes(2));              if(!data->Next()) break;            if(w_strcmp(data->GetAddr(0),attr_vid)!=0)              break;          };        };          dbio_attr.Next();      };