Hitachi, Ltd.

Hitachi Software Engineering Company, Ltd.

Hitachi Microcomputer System, Ltd.

Hitachi System Engineering, Ltd.

Hirofumi Danno

Ichiro Naito

Kiyoshi Yamaguchi

Ryota Mibe

Yasunori Hashimoto

Gunji Tsukuda

Kentaro Yoshimura

Hiroyuki Maezawa

Katsuhiko Yuura

Hiroshi Tsukino

Akiko Fukuya

Hirokazu Mimura

Keishi Ooshima

Sadahiro Ishikawa

Hideo Kamiko

Fumihiko Iwabuchi

Kenichi Ohta

Kazutoshi Tamura

A test DB data generation method for generating a database for testing, which approximates an existing database, the test DB data generation apparatus comprising: extracting distribution information of values of each column of the existing database; extracting column dependency information of the existing database; and generating test DB data based on the distribution information and the column dependency information.

Test DB data generation apparatus

A database analyzer includes a data sorting unit sorting a data group acquired from an analysis target database based on data values in a table column and storing it as analysis target data in a storage unit; a data pattern creation processing unit creating a group for each data value based on differences between the data values and storing a data pattern in the storage unit; a data pattern judgment processing unit for judging validity of the data pattern; and a data pattern transformation processing unit for reconstructing the data pattern with respect to constituent elements of each group included in the data pattern by transforming each group in accordance with a specified conversion rule for converting the constituent elements, which are conceptually similar to each other, into the same constituent element, and storing it in the storage unit if a negative result is obtained for the validity judgment.

Database analyzer and database analysis method

Object oriented technology analysis and design supporting method

The present invention is a method for extracting and generating hierarchical specification information in which the derivative of data included in already-developed software is hierarchically related and the reusability of data which is stored together with a relating procedure is high. In the method of the present invention, an existing program is analyzed and a data item and a procedure are extracted, and a procedure relating to a data item is stored in relation to the data item, and data items sharing a used area, data items for transferring data, or comparison items are stored as similar items in relation to each other, and key items are selected from the similar items, and a hierarchical specification in which the selected key items are set is generated, and dependent data items are selected from a record having the data items related to the key items, and the selected data items are added as attribute data of the hierarchical specification.

Method for generating hierarchical specification information from

A reverse engineering method for supporting software reuse in generating an upper level software product from a lower level software product allowing the reuse of some software product's among multi-level software products ranging from an upper level data flow to a lower level job flow. The method includes the steps of: generating an upper level software product using a lower level software product; generating relational information between the lower and upper level software products; inputting a request for changing the upper level software product via an input/output interface; changing the upper level software product in response to the change request; and detecting a reusable field of the lower level software product which is not to be changed, in response to a change of the upper level software product. A pair of the lower level software product and the upper level software product comprise an internal design and an external design which is higher in level than coded programs and an external design and detailed requirements a user supplied. Information representative of a reusable field with no change and a field that is not reusable which requires a change of the lower level software product, may be provided. The information is obtained by comparing the upper level software product with the lower level software product.

Method and apparatus for detecting a lower level software reusable

In a system for data processing by use of a processing language controlled by a job control program for coupling a file having at least one data item to a data set, a method of standardizing data items in an existing program stored in a storage and having a procedure part and a data definition part is disclosed. The names of two data items including the source and destination items of moving in the transfer designated in a plurality of data transfer instructions in an existing program are stored in the storage, and the equivalence number attached to the name of the transfer source item of each of the plurality of data transfer instructions is attached to the name of the transfer destination item. If a plurality of files assigned in the data definition part are defined in a single data set, the file equivalence number is attached to the plurality of files in the storage. The starting position and length of the data items are stored in the storage on the basis of the data length for the data item name in the data definition part, and the data item name is changed on the basis of the relative positions therebetween and the equivalence number thereof.

Method of software standardization by unifying and standardizing the

Growing community of inventors

Tokyo, Japan

Hirofumi Danno