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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>69.2. Built-in Operator Classes</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="spgist-intro.html" title="69.1. Introduction" /><link rel="next" href="spgist-extensibility.html" title="69.3. Extensibility" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">69.2. Built-in Operator Classes</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="spgist-intro.html" title="69.1. Introduction">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="spgist.html" title="Chapter 69. SP-GiST Indexes">Up</a></td><th width="60%" align="center">Chapter 69. SP-GiST Indexes</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="spgist-extensibility.html" title="69.3. Extensibility">Next</a></td></tr></table><hr /></div><div class="sect1" id="SPGIST-BUILTIN-OPCLASSES"><div class="titlepage"><div><div><h2 class="title" style="clear: both">69.2. Built-in Operator Classes</h2></div></div></div><p>
+ The core <span class="productname">PostgreSQL</span> distribution
+ includes the <acronym class="acronym">SP-GiST</acronym> operator classes shown in
+ <a class="xref" href="spgist-builtin-opclasses.html#SPGIST-BUILTIN-OPCLASSES-TABLE" title="Table 69.1. Built-in SP-GiST Operator Classes">Table 69.1</a>.
+ </p><div class="table" id="SPGIST-BUILTIN-OPCLASSES-TABLE"><p class="title"><strong>Table 69.1. Built-in <acronym class="acronym">SP-GiST</acronym> Operator Classes</strong></p><div class="table-contents"><table class="table" summary="Built-in SP-GiST Operator Classes" border="1"><colgroup><col /><col /><col /></colgroup><thead><tr><th>Name</th><th>Indexable Operators</th><th>Ordering Operators</th></tr></thead><tbody><tr><td rowspan="12" valign="middle"><code class="literal">box_ops</code></td><td><code class="literal">&lt;&lt; (box,box)</code></td><td rowspan="12" valign="middle"><code class="literal">&lt;-&gt; (box,point)</code></td></tr><tr><td><code class="literal">&amp;&lt; (box,box)</code></td></tr><tr><td><code class="literal">&amp;&gt; (box,box)</code></td></tr><tr><td><code class="literal">&gt;&gt; (box,box)</code></td></tr><tr><td><code class="literal">&lt;@ (box,box)</code></td></tr><tr><td><code class="literal">@&gt; (box,box)</code></td></tr><tr><td><code class="literal">~= (box,box)</code></td></tr><tr><td><code class="literal">&amp;&amp; (box,box)</code></td></tr><tr><td><code class="literal">&lt;&lt;| (box,box)</code></td></tr><tr><td><code class="literal">&amp;&lt;| (box,box)</code></td></tr><tr><td><code class="literal">|&amp;&gt; (box,box)</code></td></tr><tr><td><code class="literal">|&gt;&gt; (box,box)</code></td></tr><tr><td rowspan="11" valign="middle"><code class="literal">inet_ops</code></td><td><code class="literal">&lt;&lt; (inet,inet)</code></td><td rowspan="11" valign="middle"> </td></tr><tr><td><code class="literal">&lt;&lt;= (inet,inet)</code></td></tr><tr><td><code class="literal">&gt;&gt; (inet,inet)</code></td></tr><tr><td><code class="literal">&gt;&gt;= (inet,inet)</code></td></tr><tr><td><code class="literal">= (inet,inet)</code></td></tr><tr><td><code class="literal">&lt;&gt; (inet,inet)</code></td></tr><tr><td><code class="literal">&lt; (inet,inet)</code></td></tr><tr><td><code class="literal">&lt;= (inet,inet)</code></td></tr><tr><td><code class="literal">&gt; (inet,inet)</code></td></tr><tr><td><code class="literal">&gt;= (inet,inet)</code></td></tr><tr><td><code class="literal">&amp;&amp; (inet,inet)</code></td></tr><tr><td rowspan="6" valign="middle"><code class="literal">kd_point_ops</code></td><td><code class="literal">|&gt;&gt; (point,point)</code></td><td rowspan="6" valign="middle"><code class="literal">&lt;-&gt; (point,point)</code></td></tr><tr><td><code class="literal">&lt;&lt; (point,point)</code></td></tr><tr><td><code class="literal">&gt;&gt; (point,point)</code></td></tr><tr><td><code class="literal">&lt;&lt;| (point,point)</code></td></tr><tr><td><code class="literal">~= (point,point)</code></td></tr><tr><td><code class="literal">&lt;@ (point,box)</code></td></tr><tr><td rowspan="12" valign="middle"><code class="literal">poly_ops</code></td><td><code class="literal">&lt;&lt; (polygon,polygon)</code></td><td rowspan="12" valign="middle"><code class="literal">&lt;-&gt; (polygon,point)</code></td></tr><tr><td><code class="literal">&amp;&lt; (polygon,polygon)</code></td></tr><tr><td><code class="literal">&amp;&gt; (polygon,polygon)</code></td></tr><tr><td><code class="literal">&gt;&gt; (polygon,polygon)</code></td></tr><tr><td><code class="literal">&lt;@ (polygon,polygon)</code></td></tr><tr><td><code class="literal">@&gt; (polygon,polygon)</code></td></tr><tr><td><code class="literal">~= (polygon,polygon)</code></td></tr><tr><td><code class="literal">&amp;&amp; (polygon,polygon)</code></td></tr><tr><td><code class="literal">&lt;&lt;| (polygon,polygon)</code></td></tr><tr><td><code class="literal">&amp;&lt;| (polygon,polygon)</code></td></tr><tr><td><code class="literal">|&gt;&gt; (polygon,polygon)</code></td></tr><tr><td><code class="literal">|&amp;&gt; (polygon,polygon)</code></td></tr><tr><td rowspan="6" valign="middle"><code class="literal">quad_point_ops</code></td><td><code class="literal">|&gt;&gt; (point,point)</code></td><td rowspan="6" valign="middle"><code class="literal">&lt;-&gt; (point,point)</code></td></tr><tr><td><code class="literal">&lt;&lt; (point,point)</code></td></tr><tr><td><code class="literal">&gt;&gt; (point,point)</code></td></tr><tr><td><code class="literal">&lt;&lt;| (point,point)</code></td></tr><tr><td><code class="literal">~= (point,point)</code></td></tr><tr><td><code class="literal">&lt;@ (point,box)</code></td></tr><tr><td rowspan="10" valign="middle"><code class="literal">range_ops</code></td><td><code class="literal">= (anyrange,anyrange)</code></td><td rowspan="10" valign="middle"> </td></tr><tr><td><code class="literal">&amp;&amp; (anyrange,anyrange)</code></td></tr><tr><td><code class="literal">@&gt; (anyrange,anyelement)</code></td></tr><tr><td><code class="literal">@&gt; (anyrange,anyrange)</code></td></tr><tr><td><code class="literal">&lt;@ (anyrange,anyrange)</code></td></tr><tr><td><code class="literal">&lt;&lt; (anyrange,anyrange)</code></td></tr><tr><td><code class="literal">&gt;&gt; (anyrange,anyrange)</code></td></tr><tr><td><code class="literal">&amp;&lt; (anyrange,anyrange)</code></td></tr><tr><td><code class="literal">&amp;&gt; (anyrange,anyrange)</code></td></tr><tr><td><code class="literal">-|- (anyrange,anyrange)</code></td></tr><tr><td rowspan="10" valign="middle"><code class="literal">text_ops</code></td><td><code class="literal">= (text,text)</code></td><td rowspan="10" valign="middle"> </td></tr><tr><td><code class="literal">&lt; (text,text)</code></td></tr><tr><td><code class="literal">&lt;= (text,text)</code></td></tr><tr><td><code class="literal">&gt; (text,text)</code></td></tr><tr><td><code class="literal">&gt;= (text,text)</code></td></tr><tr><td><code class="literal">~&lt;~ (text,text)</code></td></tr><tr><td><code class="literal">~&lt;=~ (text,text)</code></td></tr><tr><td><code class="literal">~&gt;=~ (text,text)</code></td></tr><tr><td><code class="literal">~&gt;~ (text,text)</code></td></tr><tr><td><code class="literal">^@ (text,text)</code></td></tr></tbody></table></div></div><br class="table-break" /><p>
+ Of the two operator classes for type <code class="type">point</code>,
+ <code class="literal">quad_point_ops</code> is the default. <code class="literal">kd_point_ops</code>
+ supports the same operators but uses a different index data structure that
+ may offer better performance in some applications.
+ </p><p>
+ The <code class="literal">quad_point_ops</code>, <code class="literal">kd_point_ops</code> and
+ <code class="literal">poly_ops</code> operator classes support the <code class="literal">&lt;-&gt;</code>
+ ordering operator, which enables the k-nearest neighbor (<code class="literal">k-NN</code>)
+ search over indexed point or polygon data sets.
+ </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="spgist-intro.html" title="69.1. Introduction">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="spgist.html" title="Chapter 69. SP-GiST Indexes">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="spgist-extensibility.html" title="69.3. Extensibility">Next</a></td></tr><tr><td width="40%" align="left" valign="top">69.1. Introduction </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 69.3. Extensibility</td></tr></table></div></body></html> \ No newline at end of file