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From Ryan Yacyshyn <>
Subject Spellcheck on first character
Date Fri, 27 Nov 2015 03:41:52 GMT
Hi all,

Is it possible to provide spelling suggestions if it's just the first
character that's wrong (or has an additional character added)?

We have users querying for "eappointment" when they should just be
searching for "appointment". I'd like to show "appointment" as a spelling
suggestion for "eappointment".

Is this possible?

I'm using 4.10.1 and below are my configs:

*<!-- the **spellchecking** defaults in my **requestHandler** -->*
<str name="spellcheck">on</str>
<str name="spellcheck.extendedResults">false</str>
<str name="spellcheck.count">1</str>
<str name="spellcheck.alternativeTermCount">1</str>
<str name="spellcheck.maxResultsForSuggest">1</str>
<str name="spellcheck.collate">true</str>
<str name="spellcheck.collateExtendedResults">false</str>
<str name="spellcheck.maxCollationTries">5</str>
<str name="spellcheck.maxCollations">1</str>

*<!-- **spellchecking** component -->*
<searchComponent name="spellcheck" class="solr.SpellCheckComponent">
  <!-- a spellchecker built from a field of the main index -->
  <lst name="spellchecker">
    <str name="name">default</str>
    <str name="field">spell</str>
    <str name="classname">solr.DirectSolrSpellChecker</str>
    <!-- the spellcheck distance measure used, the default is the internal
levenshtein -->
    <str name="distanceMeasure">internal</str>
    <!-- minimum accuracy needed to be considered a valid spellcheck
suggestion -->
    <float name="accuracy">0.5</float>
    <!-- the maximum #edits we consider when enumerating terms: can be 1 or
2 -->
    <int name="maxEdits">2</int>
    <!-- the minimum shared prefix when enumerating terms -->
    <int name="minPrefix">1</int>
    <!-- maximum number of inspections per result. -->
    <int name="maxInspections">5</int>
    <!-- minimum length of a query term to be considered for correction -->
    <int name="minQueryLength">4</int>
    <!-- maximum threshold of documents a query term can appear to be
considered for correction -->
    <float name="maxQueryFrequency">0.01</float>


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