A method relating to databases

摘要

The present invention relates to a method pertaining to databases and intended to provide reliable collection of log-information in connection with changes in the database. So-called fuzzy check-points are used in combination with a physiological log with the intention of enabling log-information to be collected in real time. The data-information belonging to the database is divided into smaller parts in accordance with a predetermined data-structure, where respective parts are distributed on mutually the same pages or on separate pages belonging to the database. The logical UNDO-information required for the fuzzy check-point is implemented through the creation of a further part (1') on one of the pages, in the event of a change of one of the parts (1) where old data-information shall be replaced with new data-information. This further part (1') is structurally a replica of the changed part (1). The changed part (1) includes the new data-information (A') and the further part (1') includes the old data-information (A).