Calling Abort()()(), Commit()()() or Discard()()() releases the resources held by the created object.

Transactions may only span threads if they do so serially; each transaction must be active in only a single thread of control at a time. This restriction holds for parents of nested transactions as well; no two children may be concurrently active in more than one thread of control at any one time.

Cursors may not span transactions; each cursor must be opened and closed within a single transaction.

A parent transaction may not issue any Berkeley DB operations except for BeginTransaction()()(), Abort()()()and Commit()()() while it has active child transactions (child transactions that have not yet been committed or aborted).