code: public void addTermIndexColumn(TableDefinition tableDef, DBObject dbObj, String fieldName, String term) {
          addColumn(SpiderService.termsStoreName(tableDef),
                    SpiderService.termIndexRowKey(tableDef, dbObj, fieldName, term),
                    dbObj.getObjectID());
      }
docs: Index the given term by adding a Terms column for the given DBObject, field name,
  and term. Non-sharded format:
  <pre>
  [field name]/[field value]> = {[object ID]:null}
  </pre>
  Term record for a sharded object:
  <pre>
  [shard number]/[field name]/[field value] = {[object ID]:null}
  </pre>
  
  @param dbObj     DBObject that owns field.
  @param fieldName Field name.
  @param term      Term being indexed.