Christoph Straßer created SOLR-4873:
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Summary: star-wildcard (*) does not work together with stemming
Key: SOLR-4873
URL: https://issues.apache.org/jira/browse/SOLR-4873
Project: Solr
Issue Type: Bug
Components: search
Affects Versions: 4.2
Environment: Windows 7, Java 7
Reporter: Christoph Straßer
Without using a stemming-filter (e.g. solr.SnowballPorterFilterFactory)
http://localhost:8983/solr/collection1/select?q=Tochter*
matches "Tochter", "Tochterunternehmen" or "Töchter".
<fieldType name="text_general" class="solr.TextField"
positionIncrementGap="100">
<analyzer type="index">
<charFilter class="solr.MappingCharFilterFactory"
mapping="mapping-ISOLatin1Accent.txt"/>
<tokenizer class="solr.WhitespaceTokenizerFactory"/>
<filter class="solr.StopFilterFactory" ignoreCase="true"
words="stopwords.txt" enablePositionIncrements="true"/>
<filter class="solr.WordDelimiterFilterFactory"
generateWordParts="1" generateNumberParts="1" catenateWords="1"
catenateNumbers="1" catenateAll="0" splitOnCaseChange="0"/>
<filter class="solr.LowerCaseFilterFactory"/>
</analyzer>
With using a stemming-filter the same query
http://localhost:8983/solr/collection1/select?q=Tochter*
only matches "Tochterunternehmen" but not "Tochter" or "Töchter". (Stemming is
applied for type="index" and type="query")
<fieldType name="text_general" class="solr.TextField"
positionIncrementGap="100">
<analyzer type="index">
<charFilter class="solr.MappingCharFilterFactory"
mapping="mapping-ISOLatin1Accent.txt"/>
<tokenizer class="solr.WhitespaceTokenizerFactory"/>
<filter class="solr.StopFilterFactory" ignoreCase="true"
words="stopwords.txt" enablePositionIncrements="true"/>
<filter class="solr.WordDelimiterFilterFactory"
generateWordParts="1" generateNumberParts="1" catenateWords="1"
catenateNumbers="1" catenateAll="0" splitOnCaseChange="0"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.SnowballPorterFilterFactory"
language="German2" protected="protwords.txt" />
</analyzer>
Sample-Files attached.
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