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<span>pgRouting Manual (2.1.0)</span></a></h1>
<h2 class="heading"><span>pgr_isColumnIndexed</span></h2>
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<div class="section" id="pgr-iscolumnindexed">
<span id="pgr-is-column-indexed"></span><h1>pgr_isColumnIndexed<a class="headerlink" href="#pgr-iscolumnindexed" title="Permalink to this headline">¶</a></h1>
<div class="section" id="name">
<span id="index-0"></span><h2>Name<a class="headerlink" href="#name" title="Permalink to this headline">¶</a></h2>
<p><code class="docutils literal"><span class="pre">pgr_isColumnIndexed</span></code> — Check if a column in a table is indexed.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">This function is intended for the developer’s aid.</p>
</div>
<div class="admonition warning">
<p class="first admonition-title">Warning</p>
<p class="last">This function is deprecated in 2.1
Use <cite>_pgr_isColumnIndexed</cite> instead</p>
</div>
</div>
<div class="section" id="synopsis">
<h2>Synopsis<a class="headerlink" href="#synopsis" title="Permalink to this headline">¶</a></h2>
<p>Returns <code class="docutils literal"><span class="pre">true</span></code> when the column “col” in table “tab” is indexed.</p>
<div class="highlight-sql"><div class="highlight"><pre><span class="nb">boolean</span> <span class="n">pgr_isColumnIndexed</span><span class="p">(</span><span class="nb">text</span> <span class="n">tab</span><span class="p">,</span> <span class="nb">text</span> <span class="n">col</span><span class="p">);</span>
</pre></div>
</div>
</div>
<div class="section" id="description">
<h2>Description<a class="headerlink" href="#description" title="Permalink to this headline">¶</a></h2>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">tab:</th><td class="field-body"><code class="docutils literal"><span class="pre">text</span></code> Table name with or without schema component.</td>
</tr>
<tr class="field-even field"><th class="field-name">col:</th><td class="field-body"><code class="docutils literal"><span class="pre">text</span></code> Column name to be checked for.</td>
</tr>
</tbody>
</table>
<p>Returns:</p>
<blockquote>
<div><ul class="simple">
<li><code class="docutils literal"><span class="pre">true</span></code> when the column “col” in table “tab” is indexed.</li>
<li><code class="docutils literal"><span class="pre">false</span></code> when:</li>
</ul>
<blockquote>
<div><ul class="simple">
<li>The table “tab” is not found or</li>
<li>Column “col” is not found in table “tab” or</li>
<li>Column “col” in table “tab” is not indexed</li>
</ul>
</div></blockquote>
</div></blockquote>
<p class="rubric">History</p>
<ul class="simple">
<li>New in version 2.0.0</li>
</ul>
</div>
<div class="section" id="examples">
<h2>Examples<a class="headerlink" href="#examples" title="Permalink to this headline">¶</a></h2>
<div class="highlight-sql"><div class="highlight"><pre><span class="k">SELECT</span> <span class="n">pgr_isColumnIndexed</span><span class="p">(</span><span class="s1">'edge_table'</span><span class="p">,</span><span class="s1">'x1'</span><span class="p">);</span>
<span class="n">pgr_iscolumnindexed</span>
<span class="c1">---------------------</span>
<span class="n">f</span>
<span class="p">(</span><span class="mi">1</span> <span class="k">row</span><span class="p">)</span>
<span class="k">SELECT</span> <span class="n">pgr_isColumnIndexed</span><span class="p">(</span><span class="s1">'public.edge_table'</span><span class="p">,</span><span class="s1">'cost'</span><span class="p">);</span>
<span class="n">pgr_iscolumnindexed</span>
<span class="c1">---------------------</span>
<span class="n">f</span>
<span class="p">(</span><span class="mi">1</span> <span class="k">row</span><span class="p">)</span>
</pre></div>
</div>
<p>The example use the <a class="reference internal" href="../../../../doc/src/developer/sampledata.html#sampledata"><span>Sample Data</span></a> network.</p>
</div>
<div class="section" id="see-also">
<h2>See Also<a class="headerlink" href="#see-also" title="Permalink to this headline">¶</a></h2>
<ul class="simple">
<li><a class="reference internal" href="../../../../doc/src/developer/index.html#developer"><span>Developer’s Guide</span></a> for the tree layout of the project.</li>
<li><a class="reference internal" href="is_column_in_table.html#pgr-is-column-in-table"><span>pgr_isColumnInTable</span></a> to check only for the existance of the column in the table.</li>
<li><a class="reference internal" href="get_column_name.html#pgr-get-column-name"><span>pgr_getColumnName</span></a> to get the name of the column as is stored in the postgres administration tables.</li>
<li><a class="reference internal" href="get_table_name.html#pgr-get-table-name"><span>pgr_getTableName</span></a> to get the name of the table as is stored in the postgres administration tables.</li>
</ul>
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