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From Mikhail Khludnev <m...@apache.org>
Subject Re: [ANN] InvisibleQueriesRequestHandler
Date Mon, 19 Dec 2016 08:40:26 GMT
> It has an interesting failure mode. If the user misspells a word (about
> 10% of
> queries do), and the misspelling matches a misspelled document, then you
> are stuck. It will never show the correctly-spelled document.
>

FWIW (and I'm sorry for hijacking) I've faced this challenge too, and found
that DirectSpellchecker has a parameter for it: thresholdTokenFrequency see
https://cwiki.apache.org/confluence/display/solr/Spell+Checking. It can
supress lowfrequent suggestions considered as misspelling in the index.

On Mon, Dec 5, 2016 at 8:16 PM, Walter Underwood <wunder@wunderwood.org>
wrote:

> We used to run that way, with an exact search first, then a broad search if
> there were no results.
>
> It has an interesting failure mode. If the user misspells a word (about
> 10% of
> queries do), and the misspelling matches a misspelled document, then you
> are stuck. It will never show the correctly-spelled document.
>
> For the very popular book Campbell Biology, if you searched for “cambell”,
> it would show a book with Greek plays and one misspelled author. Oops.
>
> We integrated fuzzy search into edismax. With that, we get the popular
> book for misspelled queries.
>
> You can find that patch in SOLR-629. I first implemented it for Solr 1.3,
> and
> I’ve been updating it for years. Very useful, especially with the fast
> fuzzy
> introduced in 4.x.
>
> https://issues.apache.org/jira/browse/SOLR-629 <https://issues.apache.org/
> jira/browse/SOLR-629>
>
> wunder
> Walter Underwood
> wunder@wunderwood.org
> http://observer.wunderwood.org/  (my blog)
>
>
> > On Dec 5, 2016, at 9:08 AM, Charlie Hull <charlie@flax.co.uk> wrote:
> >
> > On 05/12/2016 09:18, Andrea Gazzarini wrote:
> >> Hi guys,
> >> I developed this handler [1] while doing some work on a Magento ->  Solr
> >> project.
> >>
> >> If someone is interested (this is a post [2] where I briefly explain the
> >> goal), or wants to contribute with some idea / improvement, feel free to
> >> give me a shout or a feedback.
> >>
> >> Best,
> >> Andrea
> >>
> >> [1] https://github.com/agazzarini/invisible-queries-request-handler
> >> [2]
> >> https://andreagazzarini.blogspot.it/2016/12/composing-
> and-reusing-request-handlers.html
> >>
> > We like this idea: we've seen plenty of systems where it's hard to
> change what the container system using Solr is doing (e.g. Hybris,
> Drupal...) so to be able to run multiple searches in Solr itself is very
> useful. Nice one!
> >
> > Charlie
> >
> >
> > --
> > Charlie Hull
> > Flax - Open Source Enterprise Search
> >
> > tel/fax: +44 (0)8700 118334
> > mobile:  +44 (0)7767 825828
> > web: www.flax.co.uk
> >
>
>


-- 
Sincerely yours
Mikhail Khludnev

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