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https://issues.apache.org/jira/browse/DERBY-4259?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13564020#comment-13564020
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Dag H. Wanvik commented on DERBY-4259:
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Sorry for chiming in late on this, but reading the description i was left with
two questions:
"With is the value for not-so-newly-created data bases ? What is the value for
*soft* upgraded databases? Obvious to us, I'm sure, but reading the description
it seems as though not all cases are described... At a minimum it requires the
reader to understand what hard upgrading means, so a link to its definition
would be good. Since the description relates the property to the version of the
jar it would be good to state explicitly that the DD inherits the version of
the jar that either a) created the database or b) did the hard upgrade which
will *upgrade* the dictionary format (and hence version).
> Document database property for determining database format version
> ------------------------------------------------------------------
>
> Key: DERBY-4259
> URL: https://issues.apache.org/jira/browse/DERBY-4259
> Project: Derby
> Issue Type: Improvement
> Components: Documentation
> Affects Versions: 10.6.1.0
> Reporter: Kathey Marsden
> Assignee: Kim Haase
> Priority: Minor
> Fix For: 10.10.0.0
>
> Attachments: DERBY-4259-2.diff, DERBY-4259-2.zip, DERBY-4259-3.diff,
> DERBY-4259-3.zip, DERBY-4259.diff, DERBY-4259.stat, DERBY-4259.zip
>
>
> It would be useful to have a public interface for determining the database
> format when running in soft upgrade mode. In the derby-user thread:
> http://www.nabble.com/Hard-upgrade-failing--td23826558.html#a23835534
> Evan pointed out he was using an undocumented property
> 'DataDictionaryVersion' for this purpose, but this is not ideal because it
> does not conform to the normal derby.* naming convention and is not
> documented.
> Discussion in DERBY-4255 determined that there are not currently
> DatabaseMetaData methods that achieve the same result.
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