We have just finished migrating from Cyrus 2.3 to Cyrus 2.4. One of my
users (almost the last to be moved!) spotted a small change in behaviour:
Cyrus 2.3:
. SEARCH SUBJECT ""
* SEARCH 1 2 3 ... 3873 <-- long list of messages
. OK Completed (3869 msgs in 0.000 secs)
Cyrus 2.4:
. SEARCH SUBJECT ""
* SEARCH <-- empty list of messages
. OK Completed (0 msgs in 0.030 secs)
The user was just trying to cancel an existing search. I have suggested a
more efficient approach in their mail client (Mulberry 4.0.8).
RFC 3501, section 6.4.4 "SEARCH Command" says:
In all search keys that use strings, a message matches the key if
the string is a substring of the field. The matching is
case-insensitive.
and I guess "" is strictly speaking a substring of all other strings.
Was this a deliberate change or just a consequence of the search engine
being reworked in 2.4? I don't imagine that it is a very common problem.
--
David Carter Email: David.Carter@xxxxxxxxxxxxx
University Computing Service, Phone: (01223) 334502
New Museums Site, Pembroke Street, Fax: (01223) 334679
Cambridge UK. CB2 3QH.
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