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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">'2017-01-01'</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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