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    <h1 class="heading"><a href="../index.html">
        <span>Presto 317 Documentation</span></a></h1>
    <h2 class="heading"><span>7.25. Teradata Functions</span></h2>
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  <div class="section" id="teradata-functions">
<h1>7.25. Teradata Functions</h1>
<p>These functions provide compatibility with Teradata SQL.</p>
<div class="section" id="string-functions">
<h2>String Functions</h2>
<dl class="function">
<dt id="char2hexint">
<code class="descname">char2hexint</code><span class="sig-paren">(</span><em>string</em><span class="sig-paren">)</span> &#x2192; varchar</dt>
<dd><p>Returns the hexadecimal representation of the UTF-16BE encoding of the string.</p>
</dd></dl>

<dl class="function">
<dt id="index">
<code class="descname">index</code><span class="sig-paren">(</span><em>string</em>, <em>substring</em><span class="sig-paren">)</span> &#x2192; bigint</dt>
<dd><p>Alias for <a class="reference internal" href="string.html#strpos" title="strpos"><code class="xref py py-func docutils literal"><span class="pre">strpos()</span></code></a> function.</p>
</dd></dl>

<dl class="function">
<dt id="substring">
<code class="descname">substring</code><span class="sig-paren">(</span><em>string</em>, <em>start</em><span class="sig-paren">)</span> &#x2192; varchar</dt>
<dd><p>Alias for <a class="reference internal" href="string.html#substr" title="substr"><code class="xref py py-func docutils literal"><span class="pre">substr()</span></code></a> function.</p>
</dd></dl>

<dl class="function">
<dt>
<code class="descname">substring</code><span class="sig-paren">(</span><em>string</em>, <em>start</em>, <em>length</em><span class="sig-paren">)</span> &#x2192; varchar</dt>
<dd><p>Alias for <a class="reference internal" href="string.html#substr" title="substr"><code class="xref py py-func docutils literal"><span class="pre">substr()</span></code></a> function.</p>
</dd></dl>

</div>
<div class="section" id="date-functions">
<h2>Date Functions</h2>
<p>The functions in this section use a format string that is compatible with
the Teradata datetime functions. The following table, based on the
Teradata reference manual, describes the supported format specifiers:</p>
<table border="1" class="docutils">
<colgroup>
<col width="31%" />
<col width="69%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">Specifier</th>
<th class="head">Description</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td><code class="docutils literal"><span class="pre">-</span> <span class="pre">/</span> <span class="pre">,</span> <span class="pre">.</span> <span class="pre">;</span> <span class="pre">:</span></code></td>
<td>Punctuation characters are ignored</td>
</tr>
<tr class="row-odd"><td><code class="docutils literal"><span class="pre">dd</span></code></td>
<td>Day of month (1-31)</td>
</tr>
<tr class="row-even"><td><code class="docutils literal"><span class="pre">hh</span></code></td>
<td>Hour of day (1-12)</td>
</tr>
<tr class="row-odd"><td><code class="docutils literal"><span class="pre">hh24</span></code></td>
<td>Hour of the day (0-23)</td>
</tr>
<tr class="row-even"><td><code class="docutils literal"><span class="pre">mi</span></code></td>
<td>Minute (0-59)</td>
</tr>
<tr class="row-odd"><td><code class="docutils literal"><span class="pre">mm</span></code></td>
<td>Month (01-12)</td>
</tr>
<tr class="row-even"><td><code class="docutils literal"><span class="pre">ss</span></code></td>
<td>Second (0-59)</td>
</tr>
<tr class="row-odd"><td><code class="docutils literal"><span class="pre">yyyy</span></code></td>
<td>4-digit year</td>
</tr>
<tr class="row-even"><td><code class="docutils literal"><span class="pre">yy</span></code></td>
<td>2-digit year</td>
</tr>
</tbody>
</table>
<div class="admonition warning">
<p class="first admonition-title">Warning</p>
<p class="last">Case insensitivity is not currently supported. All specifiers must be lowercase.</p>
</div>
<dl class="function">
<dt id="to_char">
<code class="descname">to_char</code><span class="sig-paren">(</span><em>timestamp</em>, <em>format</em><span class="sig-paren">)</span> &#x2192; varchar</dt>
<dd><p>Formats <code class="docutils literal"><span class="pre">timestamp</span></code> as a string using <code class="docutils literal"><span class="pre">format</span></code>.</p>
</dd></dl>

<dl class="function">
<dt id="to_timestamp">
<code class="descname">to_timestamp</code><span class="sig-paren">(</span><em>string</em>, <em>format</em><span class="sig-paren">)</span> &#x2192; timestamp</dt>
<dd><p>Parses <code class="docutils literal"><span class="pre">string</span></code> into a <code class="docutils literal"><span class="pre">TIMESTAMP</span></code> using <code class="docutils literal"><span class="pre">format</span></code>.</p>
</dd></dl>

<dl class="function">
<dt id="to_date">
<code class="descname">to_date</code><span class="sig-paren">(</span><em>string</em>, <em>format</em><span class="sig-paren">)</span> &#x2192; date</dt>
<dd><p>Parses <code class="docutils literal"><span class="pre">string</span></code> into a <code class="docutils literal"><span class="pre">DATE</span></code> using <code class="docutils literal"><span class="pre">format</span></code>.</p>
</dd></dl>

</div>
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