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    SIGNATURE HASH FOR CHECKING VERSIONS OF ABSTRACT DATA TYPES
    11.
    发明专利
    SIGNATURE HASH FOR CHECKING VERSIONS OF ABSTRACT DATA TYPES 未知

    公开(公告)号：CA2305969C

    公开(公告)日：2008-03-25

    申请号：CA2305969

    申请日：2000-04-19

    Applicant: IBM

    Inventor： KRISHNAMURTHY SAILESHWAR ,  ELLIOT STEVEN K ,  PANWAR RAJENDRA BHAGWATISINGH ,  LINDSAY BRUCE GILBERT

    IPC: G06F7/00 ,  G06F13/00

    Abstract: A method, apparatus, and article of manufacture for providing to a signature hash for checking versions of abstract data types. An identifier is constructed for the abstract data type that is substantially unique to the abstract data type, wherein the identifier comprises a concatenation of various attributes for the abstract data type. The constructed identifier is hashed to generate a signature hash value for the abstract data type, which is then stored both in the database and a class definition for the abstract data type. When the class definition is instantiated as a library function, it accesses the abstract data type from the database, and compares the signature hash value from the database and the signature hash value from the class definition in order to verify that the class definition is not outdated. The class definition is outdated when the abstract data type has been altered without the signature hash value being re- generated and re-stored in the database and the class definition.

    12.
    发明专利
    未知

    公开(公告)号：DE69131543D1

    公开(公告)日：1999-09-30

    申请号：DE69131543

    申请日：1991-03-20

    Applicant: IBM

    Inventor： ADAIR JOHN GARY ,  COYLE DANIEL JEROME ,  GRAFE ROBERT JOSEPH ,  LINDSAY BRUCE GILBERT ,  RAINSCH ROGER ALAN ,  RESCH ROBERT PETER ,  SELINGER PATRICIA GRIFFITHS

    IPC: G06F12/00 ,  G06F17/30

    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.

    16.
    发明专利
    未知

    公开(公告)号：DE69132908D1

    公开(公告)日：2002-03-14

    申请号：DE69132908

    申请日：1991-03-11

    Applicant: IBM

    Inventor： ADAIR JOHN GARY ,  DEMERS RICHARD AIME ,  ECIMOVIC DUSAN ,  JACKSON ROBERT DEAN ,  LINDSAY BRUCE GILBERT ,  MURPHY MICHAEL EDWARD ,  REINSCH ROGER ALAN ,  RESCH ROBERT PETER ,  SANDERS RICHARD ROLLAND ,  SELINGER PATRICIA GRIFFITHS ,  SUNDAY ROBERT LEO ,  ZIMOWSKI MELVIN RICHARD

    IPC: G06F12/00 ,  G06F17/30

    Abstract: The present invention relates to a data base system comprising a first computer (10) which is used to execute an application program (14), a data base (56) containing selected data for use in connection with the application program, a second computer (12) which is used to control the part of the data base system which contains the data base, the first and second computers being different types, means 17) for extracting from the application program data base commands which can be executed on the second computer but cannot be executed on the first computer, and means for replacing the extracted data base commands with call commands and for using the call commands to initiate the execution of the data base commands when required. According to the invention the data base system is characterised in that it also comprises means (46, 50) for transmitting the data base commands to the second computer, and means (52) for utilising the call commands in the application program to initiate the execution of the data base commands by the second computer on the selected data in the data base.

    17.
    发明专利
    未知

    公开(公告)号：ES2135387T3

    公开(公告)日：1999-11-01

    申请号：ES91302408

    申请日：1991-03-20

    Applicant: IBM

    Inventor： ADAIR JOHN GARY ,  COYLE DANIEL JEROME JR ,  GRAFE ROBERT JOSEPH ,  LINDSAY BRUCE GILBERT ,  RAINSCH ROGER ALAN ,  RESCH ROBERT PETER

    IPC: G06F12/00 ,  G06F17/30

    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.

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