Re: patch to filterindex.c (ITS#228)

[Kurt@OpenLDAP.org]

I believe your fix is correct.  I've applied it to -devel code
for testing.  Feedback encouraged.  Likely to be brought into
releng 1.2 soon.

	Kurt

At 07:02 PM 7/16/99 GMT, benno@columbia.edu wrote:
>Full_Name: Benn Oshrin
>Version: 1.2.4
>OS: solaris 7
>URL: http://www.columbia.edu/~benno/servers-slapd-back-ldbm-filterindex.diff
>Submission from: (NULL) (128.59.39.90)
>
>
>We noticed a situation where (with 400,000 records in our database) certain
>searches would time out rather than respond quickly (even if there were no
>entries to be found).  
>
>For our database, cn=matheson\* timed out while cn=mathesom\* failed
>immediately.  We traced this problem to faulty logic in 
>substring_comp_candidates.
>
>The patch (available at the URL provided) simply breaks the search if a NULL
>intersection of search candidates is returned since at that point it is
>impossible to find a match.
>
>
>