公开(公告)号：US4428057A

公开(公告)日：1984-01-24

申请号：US271917

申请日：1981-06-09

申请人： Jerry Setliff ,  Gerald Burnham ,  Michael Smith ,  Richard D. Hoffman

发明人： Jerry Setliff ,  Gerald Burnham ,  Michael Smith ,  Richard D. Hoffman

IPC分类号： G01C21/20 ,  G06F15/50

CPC分类号： G01C21/20

摘要： An electronic chart system in which charts of the earth are stored in digital representation and communicated to the operator by a visual display. Through the use of a Loran-C receiver or the like, the system additionally plots the carrier's position on the visual representation of the chart. The visual display is a cathode ray tube on which the visual representation is compressed or expanded to meet the demands of the operator so that the appropriate resolution is thereby obtained. To minimize memory size an encoding format is used which provides a data word for indicating the first physical element of the run line, a data word for the number of runs per line and data words for the lengths of N-1 runs of up to two variables for each line of the chart.

摘要翻译： 一种电子海图系统，其中地球的图表以数字表示存储并通过视觉显示传送给操作者。 通过使用Loran-C接收机等，该系统另外在图表的视觉表示上绘制载体的位置。 视觉显示器是阴极射线管，视觉表示被压缩或扩大以满足操作者的要求，从而获得适当的分辨率。 为了最小化存储器大小，使用编码格式，其提供用于指示运行线的第一物理元件的数据字，用于每行的运行次数的数据字和用于N-1个运行长度的数据字高达两个 图表的每一行的变量。

公开(公告)号：US5446858A

公开(公告)日：1995-08-29

申请号：US923679

申请日：1992-08-03

申请人： George P. Copeland ,  Richard D. Hoffman ,  Timothy R. Malkemus ,  Marc G. Smith

发明人： George P. Copeland ,  Richard D. Hoffman ,  Timothy R. Malkemus ,  Marc G. Smith

IPC分类号： G06F12/00 ,  G06F12/08 ,  G06F17/30 ,  G06F12/12

CPC分类号： G06F17/30067 ,  G06F12/0837 ,  Y10S707/99938

摘要： A method, system and process for providing an improved database blocking technique for updatable and scrollable cursors is disclosed. The invention is facilitated by the operation of a process in the memory of a processor. The processor, under the control of the process, builds a reserved area in the memory of the computer. The reserved area in the memory contains an image of a portion of the information residing on disk in the database. When an application opens a cursor to a database, the type of blocking is specified for that cursor. The application issues a fetch request, and if the row is not in the block in the reserved area in the memory, then a remote procedure call is performed to get the required next block of rows and return the block containing the rows back to the application. Various lock data structures are employed to manage and control the processing.

摘要翻译： 公开了一种用于为可更新和可滚动游标提供改进的数据库阻塞技术的方法，系统和过程。 通过处理器的存储器中的处理的操作便于本发明。 处理器在该过程的控制下，在计算机的存储器中建立一个保留区域。 存储器中的保留区域包含数据库中驻留在磁盘上的信息的一部分的映像。 当应用程序打开一个游标到数据库时，为该游标指定了阻止类型。 应用程序发出提取请求，如果该行不在存储器的保留区域中的块中，则执行远程过程调用以获取所需的下一行行并将包含行的块返回到应用程序 。 采用各种锁数据结构来管理和控制处理。

公开(公告)号：US5261102A

公开(公告)日：1993-11-09

申请号：US678572

申请日：1991-03-28

申请人： Richard D. Hoffman

发明人： Richard D. Hoffman

IPC分类号： G06F12/00 ,  G06F1/00 ,  G06F21/00 ,  G06F15/401

CPC分类号： G06F21/6227 ,  G06F2221/2141

摘要： A method and computer system are disclosed for determining the access privileges currently held by a database user with respect to objects in the database. The steps of the method are: (a) requesting a determination of those objects to which a given user has access privileges; (b) automatically determining those objects to which the user has direct access privileges; and (c) automatically determining those objects to which the user has indirect access privileges. This last step (c) is accomplished by (1) automatically determining all access groups to which the user belongs; and (2) automatically determining those objects to which those access groups, determined in step (1), have access privileges.

摘要翻译： 公开了一种用于确定数据库用户当前对数据库中的对象持有的访问特权的方法和计算机系统。 该方法的步骤是：（a）请求确定给定用户具有访问权限的那些对象; （b）自动确定用户具有直接访问权限的对象; 和（c）自动确定用户具有间接访问权限的对象。 最后一步（c）是通过（1）自动确定用户所属的所有接入组来完成的; 和（2）自动确定在步骤（1）中确定的那些访问组具有访问权限的那些对象。