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Date: Mon, 18 Apr 2016 15:27:10 +0530
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Subject: Re: Wildcard query behavior.
From: Modassar Ather <modather1981@gmail.com>
To: solr-user@lucene.apache.org
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Thanks Reth for your response.

When validator is changed to validate, both at query time and index time,
then should not validator*/validator return the same results at-least?

E.g. 5 documents contains validator. At index time validator got changed to
validate.
Now when validator* is searched it will also change to validate and should
match all 5 documents. In this case I am not sure how the wildcard
internally is handled meaning what the query will transform to.

Please help me understand the internals of wildcard with stemming or point
me to some documents as I could not find any details on it.

Best,
Modassar

On Mon, Apr 18, 2016 at 1:04 PM, Reth RM <reth.iksam@gmail.com> wrote:

> If you search for f:validat*, then I believe you will get same number of
> results. Please check.
>
> f:validator* is searching for records that have prefix "validator" where as
> field with stemmer which stems "validator" to "validate" (if this stemming
> was applied at index time as well as query time) its looking for records
> that have "validate" or "validator", so for obvious reasons, numFound might
> have been different.
>
>
>
> On Mon, Apr 18, 2016 at 12:48 PM, Modassar Ather <modather1981@gmail.com>
> wrote:
>
> > Hi,
> >
> > Please help me understand following.
> >
> > I have analysis chain which uses KStemFilterFactory for a field. Solr
> > version is 5.4.0
> >
> > When I search for f:validator I get 80K+ documents whereas if I search
> for
> > f:validator* I get only around 150 results.
> >
> > When I checked on analysis page I see that validator is changed to
> > validate. Per my understanding in both the above cases it should at-least
> > give the exact same result of around 80K+ documents.
> >
> > I understand in some cases wildcards can result in sub-optimal results
> for
> > stemmed content. Please correct me if I am wrong.
> >
> > Thanks,
> > Modassar
> >
>

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