Dangling node_ids?

["Roll, Kevin" <Ke...@idexx.com>]

I am attempting to determine why certain nodes in my repository have large data bundles, and I have uncovered another mystery. I wrote a simple servlet that accepts a UUID and returns the corresponding path. It just queries:

select * from [nt:base] where [jcr:uuid]=?

When I started plugging values in I discovered that a great many node_ids in DEFAULT_BUNDLE do not return a result for this query. In other words many rows in the DEFAULT_BUNDLE table do not appear to have a corresponding node or path in the repository.

Is this expected behavior or are these rows dangling? Can I safely delete them?