Wildcard searches - field:aaaa* works but field:a*a does not

[Kelly, Frank]

Hello Lucene Folks,

  Newbie here -  I've found how Solr does Wildcard searches of the form   
field:aaaaa*   using the EdgeNGramFilterFactory
https://wiki.apache.org/solr/AnalyzersTokenizersTokenFilters#solr.EdgeNGramFilterFactory

but I can't seem to dig up how to support wildcards in the middle e.g. 
field:a*a.

I guess I am missing a Tokenizer / Filter somewhere but not sure where,

Here is my text configuration

 <fieldType name="text_general" class="solr.TextField" 
positionIncrementGap="100">
      <analyzer type="index">
        <tokenizer class="solr.StandardTokenizerFactory"/>
        <filter class="solr.StopFilterFactory" ignoreCase="true" 
words="stopwords.txt" />
        <filter class="solr.LowerCaseFilterFactory"/>
        <filter class="solr.EdgeNGramFilterFactory" minGramSize="2" 
maxGramSize="64"/>
      </analyzer>
      <analyzer type="query">
        <tokenizer class="solr.StandardTokenizerFactory"/>
        <filter class="solr.StopFilterFactory" ignoreCase="true" 
words="stopwords.txt" />
        <filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt" 
ignoreCase="true" expand="true"/>
        <filter class="solr.LowerCaseFilterFactory"/>
      </analyzer>
    </fieldType>

-Frank