Julian Reschke created OAK-3739:
-----------------------------------
Summary: RDB*Store: allow schema evolution
Key: OAK-3739
URL: https://issues.apache.org/jira/browse/OAK-3739
Project: Jackrabbit Oak
Issue Type: Technical task
Components: rdbmk
Reporter: Julian Reschke
Assignee: Julian Reschke
In the future, we may have to add new table columns (for instance, see
OAK-3730).
We can somewhat decouple database changes from code changes by only using new
columns when they are present.
However, we need to make sure that once the columns have been added and the
system has started to use them, no older code writes to the DB (potentially
causing inconsistencies because of not updating these columns).
To prevent this, code could check that it understands all columns it finds on
startup. If there are unknown columns, it would need to abort and log an error
that explains the compatibility issue.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
