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<div class="section" id="arithmetic-operators">
<span id="id1"></span><h1>Arithmetic Operators<a class="headerlink" href="#arithmetic-operators" title="Permalink to this headline"></a></h1>
<p>CQL supports the following operators:</p>
<table border="1" class="docutils">
<colgroup>
<col width="13%" />
<col width="87%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">Operator</th>
<th class="head">Description</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td>- (unary)</td>
<td>Negates operand</td>
</tr>
<tr class="row-odd"><td>+</td>
<td>Addition</td>
</tr>
<tr class="row-even"><td>-</td>
<td>Substraction</td>
</tr>
<tr class="row-odd"><td>*</td>
<td>Multiplication</td>
</tr>
<tr class="row-even"><td>/</td>
<td>Division</td>
</tr>
<tr class="row-odd"><td>%</td>
<td>Returns the remainder of a division</td>
</tr>
</tbody>
</table>
<div class="section" id="number-arithmetic">
<span id="id2"></span><h2>Number Arithmetic<a class="headerlink" href="#number-arithmetic" title="Permalink to this headline"></a></h2>
<p>All arithmetic operations are supported on numeric types or counters.</p>
<p>The return type of the operation will be based on the operand types:</p>
<table border="1" class="docutils">
<colgroup>
<col width="13%" />
<col width="11%" />
<col width="10%" />
<col width="10%" />
<col width="10%" />
<col width="10%" />
<col width="10%" />
<col width="10%" />
<col width="10%" />
<col width="10%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">left/right</th>
<th class="head">tinyint</th>
<th class="head">smallint</th>
<th class="head">int</th>
<th class="head">bigint</th>
<th class="head">counter</th>
<th class="head">float</th>
<th class="head">double</th>
<th class="head">varint</th>
<th class="head">decimal</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td><strong>tinyint</strong></td>
<td>tinyint</td>
<td>smallint</td>
<td>int</td>
<td>bigint</td>
<td>bigint</td>
<td>float</td>
<td>double</td>
<td>varint</td>
<td>decimal</td>
</tr>
<tr class="row-odd"><td><strong>smallint</strong></td>
<td>smallint</td>
<td>smallint</td>
<td>int</td>
<td>bigint</td>
<td>bigint</td>
<td>float</td>
<td>double</td>
<td>varint</td>
<td>decimal</td>
</tr>
<tr class="row-even"><td><strong>int</strong></td>
<td>int</td>
<td>int</td>
<td>int</td>
<td>bigint</td>
<td>bigint</td>
<td>float</td>
<td>double</td>
<td>varint</td>
<td>decimal</td>
</tr>
<tr class="row-odd"><td><strong>bigint</strong></td>
<td>bigint</td>
<td>bigint</td>
<td>bigint</td>
<td>bigint</td>
<td>bigint</td>
<td>double</td>
<td>double</td>
<td>varint</td>
<td>decimal</td>
</tr>
<tr class="row-even"><td><strong>counter</strong></td>
<td>bigint</td>
<td>bigint</td>
<td>bigint</td>
<td>bigint</td>
<td>bigint</td>
<td>double</td>
<td>double</td>
<td>varint</td>
<td>decimal</td>
</tr>
<tr class="row-odd"><td><strong>float</strong></td>
<td>float</td>
<td>float</td>
<td>float</td>
<td>double</td>
<td>double</td>
<td>float</td>
<td>double</td>
<td>decimal</td>
<td>decimal</td>
</tr>
<tr class="row-even"><td><strong>double</strong></td>
<td>double</td>
<td>double</td>
<td>double</td>
<td>double</td>
<td>double</td>
<td>double</td>
<td>double</td>
<td>decimal</td>
<td>decimal</td>
</tr>
<tr class="row-odd"><td><strong>varint</strong></td>
<td>varint</td>
<td>varint</td>
<td>varint</td>
<td>decimal</td>
<td>decimal</td>
<td>decimal</td>
<td>decimal</td>
<td>decimal</td>
<td>decimal</td>
</tr>
<tr class="row-even"><td><strong>decimal</strong></td>
<td>decimal</td>
<td>decimal</td>
<td>decimal</td>
<td>decimal</td>
<td>decimal</td>
<td>decimal</td>
<td>decimal</td>
<td>decimal</td>
<td>decimal</td>
</tr>
</tbody>
</table>
<p><code class="docutils literal notranslate"><span class="pre">*</span></code>, <code class="docutils literal notranslate"><span class="pre">/</span></code> and <code class="docutils literal notranslate"><span class="pre">%</span></code> operators have a higher precedence level than <code class="docutils literal notranslate"><span class="pre">+</span></code> and <code class="docutils literal notranslate"><span class="pre">-</span></code> operator. By consequence,
they will be evaluated before. If two operator in an expression have the same precedence level, they will be evaluated
left to right based on their position in the expression.</p>
</div>
<div class="section" id="datetime-arithmetic">
<span id="id3"></span><h2>Datetime Arithmetic<a class="headerlink" href="#datetime-arithmetic" title="Permalink to this headline"></a></h2>
<p>A <code class="docutils literal notranslate"><span class="pre">duration</span></code> can be added (+) or substracted (-) from a <code class="docutils literal notranslate"><span class="pre">timestamp</span></code> or a <code class="docutils literal notranslate"><span class="pre">date</span></code> to create a new
<code class="docutils literal notranslate"><span class="pre">timestamp</span></code> or <code class="docutils literal notranslate"><span class="pre">date</span></code>. So for instance:</p>
<div class="highlight-cql notranslate"><div class="highlight"><pre><span></span><span class="k">SELECT</span> <span class="o">*</span> <span class="k">FROM</span> <span class="n">myTable</span> <span class="k">WHERE</span> <span class="n">t</span> <span class="o">=</span> <span class="s1">&#39;2017-01-01&#39;</span> <span class="o">-</span> <span class="mf">2</span><span class="n">d</span>
</pre></div>
</div>
<p>will select all the records with a value of <code class="docutils literal notranslate"><span class="pre">t</span></code> which is in the last 2 days of 2016.</p>
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