JPH0279118A - Data management system - Google Patents

Abstract

PURPOSE:To efficiently manage data by combining a recording medium which is exclusively used for readout and a recording medium which can be used for writing and readout any time. CONSTITUTION:In case the data of a data storing means 7 which is exclusively used for readout is to be supplemented or modified, only the adding or modifying data are written in a data storing means 6 which can be used for writing and readout any time and the index information of an index information storing means 5 is modified by means of an index information processing means 4. When the data are retrieved again, the data of the data storing means 7 and 6 are outputted. Therefore, the readout-only data storing means, such as a CD-ROM, etc., can be used as if the data stored in the data storing means can be supplemented and modified.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a database system on a computer system, which includes a read-only data storage means such as a C'D-ROM, and an optional read/write data storage means such as a hard disk. This paper relates to a data management method that uses a combination of

[Conventional technology]

In conventional database systems, CD-ROM
For those that use read-only storage media such as, a data management method dedicated to information retrieval is used, and for those that use storage media that can be written and retrieved at any time such as hard disks, a data management method that allows information storage and retrieval is used independently. was adopted.

[Problem to be solved by the invention]

Read-only storage media such as CD-ROMs have various advantages, such as large data capacity and high-speed searching. However, users cannot add to or modify the stored information.

Users can freely add information to storage media such as hard disks that can be written and read at any time.

Although it allows for modification, it is inferior to read-only storage media in terms of data capacity, search speed, etc.

An object of the present invention is to provide a data management method that eliminates the drawbacks of both by combining a read-only storage medium and a storage medium that can be written and read at any time, thereby making it possible to efficiently manage data. .

[Means to solve the problem]

The data management system of the present invention includes a data input means for inputting data, search information, etc., a read-only data storage means, an occasional write-read data storage means, the read-only data storage means, and the occasional write-read data storage means. index information storage means for storing index information of the index information storage means; index information processing means for processing the index information of the index information storage means; and a search processing means for processing information in the read/write data storage means, and a processing result data output means for outputting a processing result of the search processing means.

[Effect]

According to the configuration of the present invention, when searching for data, the user first inputs search information such as a keyword for the data that the user wants to search for using the data input means.

A search processing means receives search information from the data input means and queries the index information processing means for index information corresponding to the search information. The index information processing means receives index information from the index information storage means storing index information of the read-only data storage means and the occasional write/read data storage means, and passes it to the search processing means. The search processing means searches for data stored in the read-only data storage means and the occasional write/read data storage means based on the index information received from the index information processing means. The retrieved data is output to the processing result data output means.

Next, adding and modifying data will be explained. When there is an addition or modification to the data in the read-only data storage means, only the added and modified amount is written into the occasional write-read data storage means, and the index information in the index information storage means is modified by the index information processing means. When the data is retrieved again, the data in the read-only data storage means and the occasional write/read data storage means will be output.

〔Example〕

FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, first, a case of searching for data will be explained. The data input means 1 receives search information from the signal line 14 and outputs it to the signal line 8. The search processing means 3 receives search information from the signal line 8, generates an inquiry signal for the index of the information to be searched, and outputs it to the signal line 10. The index information processing means 4 receives and receives an index inquiry signal from the signal line 10, searches the index information stored in the index information storage means 5 through the signal line 11, and outputs the corresponding index information to the signal line 10. .

The search processing means 3 receives index information from the signal line 10,
Based on the index information, the data stored in the read-only data storage means 7 through the signal line 13 or the data stored in the read-only data storage means 6 through the signal line 12 is retrieved and outputted to the signal line 9. Information regarding whether to search the read-only data storage means 7, the occasional write/read data storage means 6, or both data storage means is also recorded in the index information stored in the index information storage means 5. has been done. The processing result data output means 2 processes and outputs the data received from the signal line 9.

Next, a case where data is added or modified will be explained. When a user attempts to modify data stored in the read-only data storage means 7, the user inputs the modified data into the data input means 1. The modified data is passed to the search processing means 3 through the signal line 8. The search processing means 3 writes only the modified data into the read/write data storage means 6 at any time. Furthermore, the search processing means 3 generates index information regarding the modified data written in the read/write data storage means 6 at any time, and passes it to the index information processing means 4 through the signal line 10.

The index information processing means 4 receives the index information of the data stored in the read-only data storage means 7 that is subject to modification from the index information storage means 5 through the signal line 11. Next, the index information processing means 4 adds and corrects the index information received from the signal line 10 to the index information received from the signal line 1.1, and stores the index information through the signal line 11 again. The information is stored in means 5.

When adding or modifying data in the read/write data storage means 6, it is done by adding or modifying the stored data itself.

〔Effect of the invention〕

As explained in detail above, according to the data management method according to the present invention, in a database system, users can
Data in a read-only data storage means such as a D-ROM can be used as if it could be added or modified.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Data input means, 2... Processing result data output means, 3... Search processing means, 4... Index information processing means, 5... Index information storage means, 6... Occasional writing Read data storage means, 7... Read-only data storage means.

Claims (1)

[Claims] a data input means for inputting data, search information, etc.;
a read-only data storage means, an occasional write-read data storage means, an index information storage means for storing index information of the read-only data storage means and the occasional write-read data storage means, and index information of the index information storage means. an index information processing means for processing; a search processing means for receiving information from the data input means and the index information processing means and processing information from the read-only data storage means and the occasional write-read data storage means; and the search processing means. A data management method comprising processing result data output means for outputting processing results of the means.