I cannot get Solr 4.6.0 to do partial word search on a particular field that
is used for faceting. Most of the information I have found suggests
modifying the fieldType "text" to include either the NGramFilterFactory or
EdgeNGramFilterFactory in the filter. However since I am copying many other
fields to "text" for searching my expectation is that the NGramFilterFactory
would create ngrams for everything sent to it, which is unnecessary and
probably costly - right?
In an effort to try and troubleshoot the issue I created a new field in the
schema and stored it so that I could see what was getting populated.
However, what I'm finding is that no ngrams are being generated, just the
actual data that gets indexed from the database.
Here's what my setup looks like:
NOTE: Every record in my test environment has the same value "Example"
<field name="PartialSubject" type="partialWord" indexed="true" stored="true"
multiValued="true" />
<copyField source="PartialSubject" dest="text">
<fieldType name="partialWord" class="solr.TextField"
positionIncrementGap="100">
<analyzer>
<tokenizer class="solr.StandardTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.EdgeNGramFilterFactory" minGramSize="3"
maxGramSize="10" side="front"/>
</analyzer>
</fieldType>
When I query Solr it reports:
<arr name="PartialSubject">
<str>Example</str>
</arr>
I was expecting exa, exam, examp, example, example to be the values for
PartialSubject so that a search for "exam" would turn up all of the records
in this test index. Instead I get 0 results.
Can anyone provide any guidance on this please?
