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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>68.5. Examples</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="gist-implementation.html" title="68.4. Implementation" /><link rel="next" href="spgist.html" title="Chapter 69. SP-GiST Indexes" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">68.5. Examples</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="gist-implementation.html" title="68.4. Implementation">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="gist.html" title="Chapter 68. GiST Indexes">Up</a></td><th width="60%" align="center">Chapter 68. 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.html" title="Chapter 69. SP-GiST Indexes">Next</a></td></tr></table><hr /></div><div class="sect1" id="GIST-EXAMPLES"><div class="titlepage"><div><div><h2 class="title" style="clear: both">68.5. Examples</h2></div></div></div><p>
+  The <span class="productname">PostgreSQL</span> source distribution includes
+  several examples of index methods implemented using
+  <acronym class="acronym">GiST</acronym>.  The core system currently provides text search
+  support (indexing for <code class="type">tsvector</code> and <code class="type">tsquery</code>) as well as
+  R-Tree equivalent functionality for some of the built-in geometric data types
+  (see <code class="filename">src/backend/access/gist/gistproc.c</code>).  The following
+  <code class="filename">contrib</code> modules also contain <acronym class="acronym">GiST</acronym>
+  operator classes:
+
+ </p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="filename">btree_gist</code></span></dt><dd><p>B-tree equivalent functionality for several data types</p></dd><dt><span class="term"><code class="filename">cube</code></span></dt><dd><p>Indexing for multidimensional cubes</p></dd><dt><span class="term"><code class="filename">hstore</code></span></dt><dd><p>Module for storing (key, value) pairs</p></dd><dt><span class="term"><code class="filename">intarray</code></span></dt><dd><p>RD-Tree for one-dimensional array of int4 values</p></dd><dt><span class="term"><code class="filename">ltree</code></span></dt><dd><p>Indexing for tree-like structures</p></dd><dt><span class="term"><code class="filename">pg_trgm</code></span></dt><dd><p>Text similarity using trigram matching</p></dd><dt><span class="term"><code class="filename">seg</code></span></dt><dd><p>Indexing for <span class="quote">“<span class="quote">float ranges</span>”</span></p></dd></dl></div><p>
+ </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="gist-implementation.html" title="68.4. Implementation">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="gist.html" title="Chapter 68. GiST Indexes">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="spgist.html" title="Chapter 69. SP-GiST Indexes">Next</a></td></tr><tr><td width="40%" align="left" valign="top">68.4. Implementation </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"> Chapter 69. SP-GiST Indexes</td></tr></table></div></body></html>
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