Range Searches

[Osullivan L.]

Hi Folks,

I'm trying to implement a normalized LC Callnumber field based on the code found in SolrMarc tools which can be used for sorting and range searches. The sorting works as expected but the range searches only seem to work on the LC alpha sequence (e.g. BA - CF). Does anyone know if Solr capable of alphanumeric ranges?

Thanks,

Luke

[Demian Katz]

I can’t think of any reason why Solr would be unable to handle an alphanumeric range.  Have you tried looking at a query with debugQuery=true to see if that reveals any clues?

 

- Demian

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[Robert Haschart]

Depending on how the field is being indexed by Solr, it might be tokenized, which would split the index entry on the spaces following the initial letters.   Check your schema.xml file for Solr. 

The field you are using should be defined something like this:

   <field name="callnumber-normalized" type="string" indexed="true" stored="true" multiValued="false"/>

If the type is defined as "text" then that is the cause of the problem.

-Bob Haschart

[Osullivan L.]

Hi Bob,

Thanks for your e-mail.

I've set up the field using:

       <fieldType name="LCNormalized" class="solr.TextField" sortMissingLast="true" omitNorms="true">
        <analyzer>
        <tokenizer class="solr.KeywordTokenizerFactory"/>
        <filter class="org.vufind.solr.analysis.LCCNormalizeFilterFactory"/>
        </analyzer>
    </fieldType>

<field name="callnumber-normalized" type="LCNormalized" indexed="true" stored="true"/>

Should I explicitly set multiValued to false and try using solr.StrField (if that is possible with the tokenizer)?

Thanks,

Luke

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From: solrma...@googlegroups.com [solrma...@googlegroups.com] on behalf of Robert Haschart [rh...@virginia.edu]
Sent: 17 September 2012 15:24
To: solrma...@googlegroups.com
Subject: Re: [solrmarc-tech] RE: Range Searches