+ * If this entry was created during the current transaction, + * creating_subid is the ID of the creating subxact; if created in a prior + * transaction, creating_subid is zero.
I don't see any place in the code where creating_subid can be zero? It looks like it's only there for future transactional implementation, but for now this attribute seems unnecessary?
The comment is not 100% valid. I removed the sentence about zero value of creating_subid.
I lost commit with this change. I am sending updated patch.
