JPH04264975A - Auxiliary master retrieval system - Google Patents

Abstract

PURPOSE:To accelerate retrieval processing by generating a retrieval master file in which data targeted to retrieve is stored, and retrieving the retrieval master file when retrieval is performed. CONSTITUTION:This system is comprised of a master file 1, a submaster file 2, an update module 3, and a retrieval module 4. The update module 3 updates the master file 1 according to update instruction data 5. and furthermore, updates the submaster file 2 for instruction data that coincides with a retrieval condition. The retrieval module 4 retrieves the content of the submaster file 2 according to retrieval instruction data 6. The retrieval can be accelerated since the retrieval module 4 always refers to only the submaster file 2.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is applicable to files in which various types of information are accumulated (hereinafter referred to as master files), when the information to be searched is not all the information and speedy search processing is required. Regarding.

0002

2. Description of the Related Art In conventional information retrieval processing, as shown in FIG. 2, all the contents of a master file are checked against the retrieval conditions to obtain the results.

[0003] In this method, even when the number of information items in the master file is large and the number of information items to be searched is small, all items are compared, so a huge amount of time is spent executing the search process. I will do it.

0004

In the conventional search method described above, the time for the search process is determined in proportion to the number of information items in the master file. Therefore, in the case of a master file that stores a large amount of information, there is a problem that search processing cannot be performed efficiently.

[0005]

[Means for Solving the Problems] The auxiliary master search method of the present invention, in a system that searches a large number of master files in real-time processing, creates a search master file that stores data to be searched, and when searching, It is configured to search the search master file.

Further, the auxiliary master search method of the present invention is configured such that when updating a master file, if the updated data is data to be searched, the search master file is also updated with the updated data.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 is an explanatory diagram showing one embodiment of the present invention. In the figure, 1 is a master file, 2 is a submaster file, 3 is an update module, 4 is a search module,
5 represents update instruction data, and 6 represents search instruction data.

The update module 3 updates the master file 1 according to the update instruction data 5, and also updates the sub-master file 2 for instruction data that matches the search conditions.

The search module 4 searches the contents of the sub-master file 2 according to the search instruction data 6. Since the search module 4 always refers to only the submaster file 2, the search can be speeded up.

[0011]

Effects of the Invention As explained above, the present invention provides a sub-master file exclusively for search processing for the purpose of speeding up search processing, and updates the sub-master file at the same time during update processing, thereby retaining the same information as the master file. The search process can be performed as if searching directly. In other words, by limiting the information to be searched,
This method has the effect of dramatically reducing processing time compared to conventional methods.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

1 Master file 2 Sub master file 3 Update module 4 Search module

Claims (2)

[Claims] [Claim 1] An auxiliary master file in a system for searching a large number of master files in real-time processing, characterized in that a search master file is created that stores data to be searched, and the search master file is searched during a search. Search method. 2. The auxiliary master search method according to claim 1, wherein when updating the master file, if the updated data is data to be searched, the search master file is also updated with the updated data.