--- a/roundup/hyperdb.py	Sun Aug 27 11:34:12 2006 +0000
+++ b/roundup/hyperdb.py	Tue Aug 29 04:20:50 2006 +0000
@@ -15,7 +15,7 @@
 # BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
 # SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 #
-# $Id: hyperdb.py,v 1.125 2006-08-22 19:33:02 schlatterbeck Exp $
+# $Id: hyperdb.py,v 1.126 2006-08-29 04:20:50 richard Exp $
 
 """Hyperdatabase implementation, especially field types.
 """
@@ -728,6 +728,12 @@
 
         Save all data changed since the database was opened or since the
         last commit() or rollback().
+
+        fail_ok indicates that the commit is allowed to fail. This is used
+        in the web interface when committing cleaning of the session
+        database. We don't care if there's a concurrency issue there.
+
+        The only backend this seems to affect is postgres.
         '''
         raise NotImplementedError