Re: Attempting to make memberUID searches case insensitive

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On Thu, 2018-08-09 at 18:45 -0500, Patrick Landry wrote:
> Sorry. I did not answer your db2index question. I have two servers
> using multimaster replication and I did run db2index.pl on both
> servers
> after adding the index.
> 
> As to Ludwig's suggestion, I can run the queries using
> ":caseIgnoreIA5Match:" 
> in an extensible match search filter
> (memberuid:caseIgnoreIA5Match:=c00001096)
> and the results are correct. I did not perform any timing tests on
> that before
> I created the index so I cannot say if it is faster after the index
> was created.
> My feel is that it is faster.
> 
> I will check the memberuid.db file.
> 
> I would not be surprised if, as Ludwig states, the default matching
> rule for
> the attribute is used unless it is overridden in the search filter.
> That was 
> just not my understanding going in.

Reading this email, and seeing the output of your memberuid.db, I
believe that Ludwig is correct. the caseIgnoreIA5Match is an *extended*
index type, which you must request on search. This is demonstrated by
the evidence and search results you have presented.

So I would have to say that you need to put in the MR in the search
request for this to function the way you desire.

Another (invasive) option would be to alter the memberuid schema to
change it's syntax type to affect the behaviour of the indexing code.
This has some risks on upgrade and compatability. If I recall, the
content of 99user.ldif is scanned on startup and duplicate schema
entries compared to the system schema are "removed" due to a past issue
with IPA I believe. This means if you over-loaded the schema in
99user.ldif it may vanish with a yum upgrade.

Hope that helps,

> 
> Thanks for your time so far.
> 
> > From: "William Brown" <william@xxxxxxxxxxxxxxxx>
> > To: "General discussion list for the 389 Directory server project."
> > <389-users@xxxxxxxxxxxxxxxxxxxxxxx>
> > Sent: Thursday, August 9, 2018 6:07:17 PM
> > Subject: [389-users] Re: Attempting to make memberUID searches case
> > insensitive
> > 
> > On Thu, 2018-08-09 at 08:23 -0500, Patrick Landry wrote:
> > > So what is the point of adding the matching rule when defining
> > the
> > > index? Is that
> > > simply so that the index is built with the *capability* of
> > supporting
> > > searches using
> > > that matching rule explicitly?
> > 
> > I think it would be worth trying Ludwig's suggestion so we can work
> > out
> > *what's* going on. Perhaps the assumption we are making about what
> > the
> > MR does is incorrect, and it's building a supplemental index. It's
> > good
> > to check these things to understand the behaviours. 
> > 
> > Perhaps something else to do is check to see what content is in the
> > memberuid.db file to see what indexes were added.
> > 
> > Finally, did you run db2index again? I don't know if you answered
> > this.
> > 
> > -- 
> > Sincerely,
> > 
> > William
> > _______________________________________________
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> 
> 
> _______________________________________________
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-- 
Sincerely,

William
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