[Zope-CMF] is there a conflict error resistent index

[Joachim Schmitz]

hi,

during our recent search for the cause of the many conflict errors, we 
discovered that nearly all of them where caused during indexing the 
portal_catalog, when the same values are indexed. This can happen easily 
with date_indexes, since the dates are only stored with a resolution of 
1 minute. Even more conflict error prone is the reviewstate. Since there 
are only a few reviewstates.

In all cases there is actually an easy conflict resolution strategy, 
when two transactions try to change into the same review_state at the 
same time both object_ids must be stored in the index.


Did someone write such an index, or can someone give hints howto write 
such an index.

-- 
Gruß Joachim