| 摘要 |
PROBLEM TO BE SOLVED: To provide a step of deleting a data record from a second-level storage or a main store.SOLUTION: In a first-level storage, a look-up relating to a data record prescribed by a row identifier is executed. When the row identifier is detected in the first-level storage, a look-up relating to an updated row identifier that represents an update of the data record prescribed by the updated row identifier is executed in the second-level storage and the main store. When the updated row identifier is detected in the second-level storage, a deletion log of the row identifier for invalidating the row identifier is generated from the first-level storage. A flag representing an invalid updated row identifier is generated and a re-execution log for restoring the data record is generated in the first-level storage. |
