OrientDB：RID分配一次和永久？

Question

Imagine the following:

• a newly created node gets for example the RID #19:2
• some time later that node #19:2 gets deleted (so the id would be theoretically available again)

Now my question is: Is there a possibility/risk, that the RID #19:2 could be assigned again to another newly created node or can I be sure, that it won't be assigned ever again?

Answer 1

Luca Garulli (Founder and CEO of OrientDB LTD) wrote here on SO:

the RID (Record ID) is never recycled.

But it would probably be wise in general to regard it as an internal "implementation detail" whenever possible, if only because @rid values might not survive export/import. (For this reason, I think it would be nice to have a shorthand for SELECT FROM <class> WHERE <id> = <value> )