Synchronous change data capture in a relational database

G - Physics – 06 – F

Patent

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G06F 17/30 (2006.01)

Patent

CA 2447522

A synchronous change data capture system and methodology are described in which, for each statement of a transaction, a transaction identifier (233, 241) that uniquely identifies each transaction is recorded along with the change data (231). When the transaction is committed, the transaction identifier (233, 241) and a system change number (243) for the commit is recorded in a transaction table (250). To identify the commit system change number for each statement in the change data, the transaction identifier (233, 241) in the change data is used to fetch the commit system change number (243) from the transaction table (250).

L'invention concerne un système et un procédé de capture de données de changement synchrone dans lesquels, pour chaque instruction de transaction, un identificateur (233, 241) identifiant chaque transaction est enregistré avec les données (231) de changement. Lorsque la transaction est sauvegardée, l'identificateur (233, 241) et un numéro (243) de changement du système pour la sauvegarde sont enregistrés dans une table (250) de transaction. Pour identifier le numéro de changement du système de sauvegarde pour chaque instruction dans les données de changement, l'identificateur (233, 241) de transaction des données de changement est utilisé afin de récupérer le numéro (243) de changement du système dans la table (250) de transaction.

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