,b) only contains one occurrence of the previous event type pair.
</p></div><dl class="paramcmts block"><dt class="param">singleRDD</dt><dd class="cmt"><p>The RDD that contains the complete single inverted index</p></dd><dt class="param">last_checked</dt><dd class="cmt"><p>The loaded values from the LastChecked table (it should be null if it is the first time that
                    events are indexed in this log database).</p></dd><dt class="param">intervals</dt><dd class="cmt"><p>The list of the interval