title: In Solr 7.x, how to tokenize only on comma and not on whitespace or other special character?
body: <p>In my schema, I have one column having comma separated list of actors. For example, Chris Pratt, Vin Diesel, Bradley Cooper, Zoe Saldana. And another column with comma separated Genre. For example Action,Adventure,Sci-Fi. In both cases I would like to tokenize only on ',' and not on white space or '-'. 
  I tried creating new FieldType as suggested by another stackoverflow question,</p>
  
  <pre><code>&lt;fieldType name="commaDelimited" class="solr.TextField"&gt;
      &lt;analyzer&gt;
          &lt;tokenizer class="solr.PatternTokenizerFactory" pattern="[,]" /&gt;
      &lt;/analyzer&gt;
  &lt;/fieldType&gt;
  </code></pre>
  
  <p>It is being split on ',' but it is also splitting on whitespace and '-', resulting in tokens such as Chris,Pratt,Vin,Diesel,Bradley,Cooper,Zoe,Saldana, sci, fi.
  I would like it to split only on ',' and not on any other special character.
  How can I do this ?</p>