[Koha-devel] LinkBibHeadingsToAuthorities not working as expected

[dcook at prosentient.com.au]

Using koha-testing-docker set up for ICU and with my fix from
https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=27198:

 

querytype ccl2rpn

set_cclfile /etc/koha/zebradb/ccl.properties

format xml

elements zebra::snippet

 

Z> f Match-heading,phr,ext,do-not-truncate="the Q"

Sent searchRequest.

Received SearchResponse.

Search was a success.

Number of hits: 34, setno 24

SearchResult-1: term=the cnt=34

records returned: 0

Elapsed: 0.000315

Z> show

Sent presentRequest (1+1).

Records: 1

Record type: XML

<record xmlns="http://www.indexdata.com/zebra/">

  <snippet name="Match-heading" type="p"
fields="Match">Xenophon<s>the</s>Historian</snippet>

</record>nextResultSetPosition = 2

Elapsed: 0.003864

 

So that's special. admittedly that's Zebra 2.0.59.

 

On Zebra 2.1.4 with ICU:

 

Z> f Match-heading,phr,ext,do-not-truncate="the Q"

Sent searchRequest.

Received SearchResponse.

Search was a success.

Number of hits: 0, setno 2

SearchResult-1: term=the  cnt=5383, term=Q cnt=10

records returned: 0

Elapsed: 0.009691

Z> f Match-heading,phr,ext,do-not-truncate="the"

Sent searchRequest.

Received SearchResponse.

Search was a success.

Number of hits: 85, setno 3

SearchResult-1: term=the cnt=85

records returned: 0

Elapsed: 0.002209

 

However, 85 results is still too many. It should be 0 results.

 

I can't add the diagnostics from
https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=27198 right now
though. so will have to get back to this one another day probably.

 

But maybe someone else using Zebra with ICU can look into this problem too.

 

It's leading to lots of duplicate authorities it seems.

 

David Cook

Software Engineer

Prosentient Systems

Suite 7.03

6a Glen St

Milsons Point NSW 2061

Australia

 

Office: 02 9212 0899

Online: 02 8005 0595

 

From: Koha-devel <koha-devel-bounces at lists.koha-community.org> On Behalf Of
dcook at prosentient.com.au
Sent: Friday, 11 December 2020 4:22 PM
To: 'Koha Devel' <koha-devel at lists.koha-community.org>
Subject: Re: [Koha-devel] LinkBibHeadingsToAuthorities not working as
expected

 

Ugh yeah no. I'm reproducing it with koha-testing-docker too.

 

Looks like yet another ICU bug.

 

David Cook

Software Engineer

Prosentient Systems

Suite 7.03

6a Glen St

Milsons Point NSW 2061

Australia

 

Office: 02 9212 0899

Online: 02 8005 0595

 

From: Koha-devel <koha-devel-bounces at lists.koha-community.org
<mailto:koha-devel-bounces at lists.koha-community.org> > On Behalf Of
dcook at prosentient.com.au <mailto:dcook at prosentient.com.au> 
Sent: Friday, 11 December 2020 3:50 PM
To: 'Koha Devel' <koha-devel at lists.koha-community.org
<mailto:koha-devel at lists.koha-community.org> >
Subject: Re: [Koha-devel] LinkBibHeadingsToAuthorities not working as
expected

 

Then again. I can't reproduce this problem on koha-testing-docker, but I can
on a prod Koha running Zebra 2.1.4 with. a very strange
/etc/koha/zebradb/etc/default.idx file.

 

David Cook

Software Engineer

Prosentient Systems

Suite 7.03

6a Glen St

Milsons Point NSW 2061

Australia

 

Office: 02 9212 0899

Online: 02 8005 0595

 

From: Koha-devel <koha-devel-bounces at lists.koha-community.org
<mailto:koha-devel-bounces at lists.koha-community.org> > On Behalf Of
dcook at prosentient.com.au <mailto:dcook at prosentient.com.au> 
Sent: Friday, 11 December 2020 3:32 PM
To: 'Koha Devel' <koha-devel at lists.koha-community.org
<mailto:koha-devel at lists.koha-community.org> >
Subject: [Koha-devel] LinkBibHeadingsToAuthorities not working as expected

 

Hi all,

 

I'm still investigating, but it seems to me that the C4::Linker::Default in
C4::Biblio::LinkBibHeadingsToAuthorities isn't searching accurately using
C4::Heading::authorities. 

 

I'm looking at C4::AuthoritiesMarc::SearchAuthorities and at a glance it
looks OK, but in practice I think that my search queries are getting way too
many results. 

 

By hand, if I try the following query:

Match-heading,phr,ext,do-not-truncate="e"

 

I get a huge number of results, which is odd, since that should be an
"exact" match.

 

I've opened https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=27198
because I need to improve the diagnostics available for a Zebra authorities
database, but yeah. not good. Hopefully I'll know more soon.

 

David Cook

Software Engineer

Prosentient Systems

Suite 7.03

6a Glen St

Milsons Point NSW 2061

Australia

 

Office: 02 9212 0899

Online: 02 8005 0595

 

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