EP0449494A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method and apparatus for controlling the transfer of data between heterogeneous data base systems
Assignee: International Business Machines Corp
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Filing: 1991-03-20
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Granted: —
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Expires: 2011-03-20
Abstract
Abstract The invention relates to a system including a first database management system for managing a database (40) including data having a first data format and a second database management system for managing a database (50) including data having a second data format. The invention is a method for converting data transmitted between the first and second database management systems, the method including the steps of sending from the first to the second database management system a command containing data in a data format native to the first database management system; and at the second database management system, converting the data in the command into a data format native to the second database management system.
Inventors
- 👤 John Gary Adair
- 👤 Daniel Jerome Coyle, Jr.
- 👤 Robert Joseph Grafe
- 👤 Bruce Gilbert Lindsay
- 👤 Roger Alan Rainsch
- 👤 Robert Peter Resch
- 👤 Patricia Griffiths Selinger
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 21:12
CPC Classifications
G; G06; G06F; G06F17/00; G06F16/00; G06F16/20; G06F16/25; G06F16/258; Y; Y10; Y10S; Y10S707/00; Y10S707/912; Y10S707/922; Y10S707/99941; Y10S707/99942; Y10S707/99951; Y10S707/99952; Y10S707/99954
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
In a system including a first database management system for managing a database (40) including data having a first data format and a second database management system for managing a database (50) including data having a second data format, a method for converting data transmitted between the first and second database management systems, the method including the steps of: sending from the first to the second database management system a command containing data in a data format native to the first database management system; and at the second database management system, converting the data in the command into a data format native to the second database management system.
Claim 2
Dependent Claim
78 words
The method of Claim 1, further including: at the second database management system, processing the command to produce resulting data, the resulting data being in the data format native to the second database management system; sending the resulting data in the data format native to the second database management system to the first database management system; and at the first database management system, converting the resulting data into the data format native to the first database management system.
Claim 3
Dependent Claim
78 words
The method of Claim 2, wherein the system further includes a first database system unit connected between the first database management system and the second database management system, wherein: the step of sending the command includes receiving the command at the first database system unit and sending the command from the first database system unit to the second database system without converting the data in the command into a data format native to the first database system unit.
Claim 4
Dependent Claim
84 words
The method of Claim 3, wherein the system further includes a second database system unit connected between the first database management system and the second database management system, wherein: the step of sending the resulting data includes receiving the resulting data at the second database system unit and sending the resulting data from the second database system unit to the first database management system without converting the data format of the return data into a data format native to the second database system unit.
Claim 5
Dependent Claim
42 words
The method of Claim 2, wherein the first database management system is a first version of a database management system and the second database management system is a second version of the database management system, the first and second versions being non-identical.
Claim 6
Dependent Claim
57 words
The method of Claim 2, wherein the first database management system is for executing on a first digital computer which represents data in a first internal format and the second database management system is for executing on a second digital computer which represents data in a second internal format, the first and second internal formats being non-equivalent.
Claim 7
Dependent Claim
189 words
In a distributed database system including a plurality of database managers, each database manager for executing in a respective digital computer, a method for minimising conversion of data transferredbetween database managers, comprising the steps of: sending a command containing input data from a first database manager to a second database manager, the input data having a data format used by the first database manager; at the second database manager, if the second database manager uses a data format which is non-equivalent to the data format used by the first database manager, converting the input data into the data format used by the second database manager; at the second database manager, executing the command to produce resulting data in the data format used by the second database manager; sending the resulting data in the data format used by the second database manager to the first database manager; and at the first database manager, if the data format used by the first database manager is not equivalent to the data format used by the second database manager, converting the resulting data into the data format used by the first database manager.
Claim 8
Dependent Claim
165 words
In a system in which a user database manager controls a first database and a server database manager controls a second database, a method for minimising the conversion of data communicated between the user and server database managers, the method including the steps of: sending from the user database manager to the server database manager a command containing input data, the input data having a data format native to the user datahase manager; at the server database manager, converting the input data into a data format native to the server database manager; at the server database manager, executing the command by processing the input data after converting the input data; in response to executing the command, obtaining resulting data from the second database, the resulting data having the data format native to the server database manager; sending the resulting data to the user first database manager; and at the user database manager, converting the resulting data into the format native to the user database manager.
References Cited (Backward Citations)
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