number of source rows aggregated.</p></div>
</li>
</ul>
<a name="distinct-java.lang.Object-">
<!--   -->
</a>
<ul class="blockList">
<li class="blockList">
<h4>distinct</h4>
<pre>public static&nbsp;java.lang.Object&nbsp;distinct(java.lang.Object&nbsp;colname)</pre>
<div class="block"><p>Returns a distinct reducer produces a set of distinct values.</p></div>
</li>
</ul>
<a name="distinctUInt32-java.lang.Object-">
<!--   -->
</a>
<ul class="blockList">
<li class="blockList">
<h4>distinctUInt32</h4>
<pre>publi