| 摘要 |
A method, system, and computer program product for managing upgrades of database systems using a transparently-patched seed data table. The method commences on a running system by copying (while software applications are running) portions of data comprising a seed data table to database table rows that are temporarily inaccessible by the software applications. The copy operation creates new rows (a seed data table copy) in a database table. The method continues while software applications are running by modifying the seed data table copy (e.g., by applying a patch). For a brief time, the method stops the software applications, then changes the database table rows that were temporarily inaccessible by the software applications to become accessible by the software applications and restarts the software application to point to the patched seed data table copy. The patch can add or change a column of the seed data table copy or its schema. |
