JPH0370049A - File controller - Google Patents

Abstract

PURPOSE:To quickly find desired control information records by merging three indexes to prepare one index for one control information record and reading control information when a processing instructor needs many control information in a directory file. CONSTITUTION:Of the control information record, an index 10 that control the control information record of the data which only 1 user of a data base system can use and is generated for each user, an index 11 which makes plural users as one group and is generated for each group so that only the users who are a part of the group can use it, and an index 12 which all users can use and one is made for a system, are merged into one merged index 8, and this merged index 8 is temporarily stored in a work file 7. The merged index 8 prepared at the work file is read in, and the desired control information record is found from the directory file 9 based on this merged index. Thus, the time for examining the index can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is utilized in an information processing system. In particular, it relates to database control means.

〔overview〕

The present invention is a means for investigating the indexes of a large number of management information records in a directory file, by merging a usage index, a group shared index, and a system shared index that can be used by a processing instructor into a single merged index. This makes it possible to quickly search for a desired management information record.

[Conventional technology]

In the conventional example, among the management information records in the directory file, the management information records of data that can be used by the processing instructor are managed using three indexes. In order to obtain a management information record of data that can be used by a processing instructor, three indexes are examined in this order: a user index, a group shared index, and a system shared index. [Problem to be solved by the invention] Such a conventional example Now, when a processing instructor needs a lot of management information in a directory file, he has to check three indexes for one management information record and repeat this process for the required number of records. The drawback was that it took time to check the index.

The present invention aims to eliminate such drawbacks and to provide a file control device that can shorten the time it takes to check an index.

[Means for solving problems]

The present invention provides a plurality of records that correspond one-to-one to management information, a user index that manages records that can be used by one specific user among these records, and a user index that manages records that can be used by one specific user among these records; It is connected to a directory file that stores a group shared index that manages records available to users and a system shared index that manages records available to all users. In a file control device equipped with reud reading means for reading a desired record from a directory file, a user index relating to a record that corresponds one-to-one to desired management information from the directory file in accordance with an instruction from a processing instructor; The present invention is characterized by comprising index merging and holding means for reading a group shared index and a system shared index, creating and holding a merged index.

[Effect]

Among the many management information records stored in a file, management information records of data that can be used only by one user of the database system are managed, and an index created for each user (user index) and multiple usage The system manages management information records for data that can only be used by users belonging to the group, and manages indexes created for each group (group shared index) and management information records for data that can be used by all users. One index created in the system (a system shared index) is merged, and one merged index is temporarily stored in a work file. A merged index created in a work file is read, and a desired management information record is quickly found from a directory file based on the merged index.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

Referring to FIG. 1, this embodiment includes a processing start instructing device (2) for instructing the start of record processing for a directory file 9, and a directory information processing means 2 for reading records from the directory file 9. The information processing means 2 includes a merged index creation instruction means 3 that instructs to create a merged index, and a merged index read instruction child actor 4 that instructs to read the merged index. Merge index 8 according to the instructions of
a merge index creating means 5 for creating a merge index 8 in a work file 7; a merge index reading means 6 for reading a merge index 8 from the work file 7 in accordance with an instruction from the merge index read instruction means 4; The directory file 9 includes a work file 7 having an index 8 and a directory file 9 storing management information for storing data of a database system. Among the information records, management of data that can be used only by one user of the database system.The user index 10, which is an index created for each user, manages the information records and organizes the data that can be used by only one user of the database system. Group shared index 11, which is an index created for each group and manages management information records of data that can only be used by users belonging to the group.
It manages data management information records that can be used by all users, and is composed of a system shared index 12, which is an index created in the system, and a subfile 13, which is a subset of data management information. Ru. That is, this embodiment includes a plurality of records that correspond one-to-one to management information, a user index 10 that manages records that can be used by a specific user among these records, and a user index 10 that manages records that can be used by a specific user among these records. It is connected to a directory file 9 that stores a group shared index 11 that manages records that can be used by multiple users and a system shared index 12 that manages records that can be used by all users. The present invention is further equipped with record reading means for reading a desired record from the directory file 9 based on the index 11 and the system shared index 12. Merged index creation means 5 and merged index 8 which are index merging holding means for reading user indexes, group shared indexes, and system shared indexes related to records that correspond one-to-one to desired management information, and creating and holding a merged index. A work file 7 is provided for storing.

Next, the operation of this embodiment will be explained. When processing start is requested from processing start instructing device (2), directory information processing means 2 instructs merged index creation instructing means 3 to create a merged index using the inputted processing instructing person name. The merge index creation means 5 creates a user index 10 of the processing instructor in the directory file 9;
A merged index 8 is created in the work file 7 by reading from the group shared index 11 and the system shared index 12 of the group to which the processing instructor belongs, and by merging all the indexes. Next, the directory information processing means 2 uses the management information record name to instruct the merged index reading instruction means 4 to read the merged index. The merged index reading means 6 reads the corresponding index record from the merged index 8 and passes it to the directory information processing means 2. The directory information processing means 2 reads the target management information record from the subfile 13 based on the passed index record.

〔Effect of the invention〕

As explained above, the present invention creates two indexes by merging three indexes for one management information record when a processing instructor requires a large amount of management information in a dayreg l-IJ file. This has the effect of allowing you to quickly find the desired management information record by reading it.

[Brief explanation of drawings]

The figure is a block configuration diagram showing the configuration of an embodiment of the present invention. ■...Processing start instruction device, 2...Directory information processing means, 3...Merge index creation instruction means, 4
. . . Merged index reading instruction means, 5 . . Merged index creation means, 6 . . Merged index reading means, 7. Work file, 8. Merged index, 9. Directory file, 10. ...User index, 11-...Group shared index,
12... System shared index, 13... Subfile.

Claims (1)

[Claims] 1. A plurality of records that correspond one-to-one to management information, a user index that manages records that can be used by a specific user among these records, and a user index that manages records that can be used by a specific user among these records; It is connected to a directory file that stores a group shared index that manages records that can be used by multiple users and a system shared index that manages records that can be used by all users. In a file control device equipped with a record reading means for reading a desired record from this directory file based on an index, a record related to a record that corresponds one-to-one to desired management information from the directory file in accordance with an instruction from a processing instructor. 1. A file control device comprising index merging and holding means for reading a user index, a group shared index, and a system shared index, and creating and holding a merged index.