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<div class="section" id="html-untag">
<h1>8.11.5. html_untag<a class="headerlink" href="#html-untag" title="Permalink to this headline">¶</a></h1>
<div class="section" id="summary">
<h2>8.11.5.1. Summary<a class="headerlink" href="#summary" title="Permalink to this headline">¶</a></h2>
<p><tt class="docutils literal"><span class="pre">html_untag</span></tt> strips HTML tags from HTML and outputs plain text.</p>
<p><tt class="docutils literal"><span class="pre">html_untag</span></tt> is used in <tt class="docutils literal"><span class="pre">--output_columns</span></tt> described at <a class="reference internal" href="../commands/select.html"><em>select</em></a>.</p>
</div>
<div class="section" id="syntax">
<h2>8.11.5.2. Syntax<a class="headerlink" href="#syntax" title="Permalink to this headline">¶</a></h2>
<p><tt class="docutils literal"><span class="pre">html_untag</span></tt> requires only one argument. It is <tt class="docutils literal"><span class="pre">column</span></tt>.</p>
<div class="highlight-none"><div class="highlight"><pre>html_untag(column)
</pre></div>
</div>
</div>
<div class="section" id="usage">
<h2>8.11.5.3. Usage<a class="headerlink" href="#usage" title="Permalink to this headline">¶</a></h2>
<p>Here are a schema definition and sample data to show usage.</p>
<p>Sample schema:</p>
<p>Execution example:</p>
<div class="highlight-none"><div class="highlight"><pre>table_create WebClips TABLE_NO_KEY
# [[0, 1337566253.89858, 0.000355720520019531], true]
column_create WebClips url COLUMN_SCALAR ShortText
# [[0, 1337566253.89858, 0.000355720520019531], true]
column_create WebClips content COLUMN_SCALAR ShortText
# [[0, 1337566253.89858, 0.000355720520019531], true]
column_create WebClips tag COLUMN_VECTOR ShortText
# [[0, 1337566253.89858, 0.000355720520019531], true]
</pre></div>
</div>
<p>Sample data:</p>
<p>Execution example:</p>
<div class="highlight-none"><div class="highlight"><pre>load --table WebClips
[
{"_key": 1, "url": "http://groonga.org", "tag": ["groonga"], "content": "groonga is <span class='emphasize'>fast</span>"},
{"_key": 2, "url": "http://mroonga.org", "tag": ["mroonga"], "content": "mroonga is <span class=\"emphasize\">fast</span>"},
]
# [[0, 1337566253.89858, 0.000355720520019531], 2]
</pre></div>
</div>
<p>Here is the simple usage of <tt class="docutils literal"><span class="pre">html_untag</span></tt> function which strips HTML tags from content of column.</p>
<p>Execution example:</p>
<div class="highlight-none"><div class="highlight"><pre>select WebClips --output_columns "_key, html_untag(content)" --command_version 2
# [
# [
# 0,
# 1337566253.89858,
# 0.000355720520019531
# ],
# [
# [
# [
# 2
# ],
# [
# [
# "html_untag",
# "null"
# ]
# ],
# [
# "groonga is fast"
# ],
# [
# "mroonga is fast"
# ]
# ]
# ]
# ]
</pre></div>
</div>
<p>When executing the above query, you can see "span" tag with "class" attribute is stripped.
Note that you must specify <tt class="docutils literal"><span class="pre">--command_version</span> <span class="pre">2</span></tt> to use <tt class="docutils literal"><span class="pre">html_untag</span></tt> function.</p>
</div>
<div class="section" id="parameters">
<h2>8.11.5.4. Parameters<a class="headerlink" href="#parameters" title="Permalink to this headline">¶</a></h2>
<p>There is one required parameter, <tt class="docutils literal"><span class="pre">column</span></tt>.</p>
<div class="section" id="column">
<h3>8.11.5.4.1. <tt class="docutils literal"><span class="pre">column</span></tt><a class="headerlink" href="#column" title="Permalink to this headline">¶</a></h3>
<p>It specifies a column of the table.</p>
</div>
</div>
<div class="section" id="return-value">
<h2>8.11.5.5. Return value<a class="headerlink" href="#return-value" title="Permalink to this headline">¶</a></h2>
<p><tt class="docutils literal"><span class="pre">html_untag</span></tt> returns plain text which is stripped HTML tags from content of column.</p>
</div>
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<h3><a href="../../index.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">8.11.5. html_untag</a><ul>
<li><a class="reference internal" href="#summary">8.11.5.1. Summary</a></li>
<li><a class="reference internal" href="#syntax">8.11.5.2. Syntax</a></li>
<li><a class="reference internal" href="#usage">8.11.5.3. Usage</a></li>
<li><a class="reference internal" href="#parameters">8.11.5.4. Parameters</a><ul>
<li><a class="reference internal" href="#column">8.11.5.4.1. <tt class="docutils literal"><span class="pre">column</span></tt></a></li>
</ul>
</li>
<li><a class="reference internal" href="#return-value">8.11.5.5. Return value</a></li>
</ul>
</li>
</ul>
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