Hi I am doing schema update using the SchemaUpdate class.

Due to programming environment constraints, I have to run the update thru command line. I believe the idea of doing update is so that you can update a single table with a single property. Howver, as I try this feature out, hibernate continues to throw exception because this table I want to update refers to an unmapped class. I can move to the next step by adding another map file, but then more and more unmapped classes get involved, and pretty soon, I am feeding the entire collection of map files. So that's no different from updating the entire database.

Am I missing something here? is there a way to get SchemaUpdate to just see these other map files without explicitly having to tack them as command line args? and without updating their tables as well?

Since assoications affect the generated sql its hard to not have them there.

Until we add a mechanism for schemaupdate/export to only generate updates for a specific table/entity then you are out of luck.

I don't mean to make light of your product, but having used jdo, and successfully update single tables, I know it must be doable. for example, you can make the assumption that the other tables have no changes and automatically read out their existing schema from the database. wouldn't that be one way to achieve this?

JDO is a spec, not an implementation ;)

Anyhow - it's opensource so feel free to come in and fix it.

obviously I used one of the implementations. just don't want to start a pissing contest by mentioning names.

I posted a JIRA for this to see if other people are in agreement to having this feature.

i can tell you that it has been asked before.

so sure, other people want it - just noone bad enough to actually implement it.