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2 <!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>Chapter 65. Built-in Index Access Methods</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="custom-rmgr.html" title="64.2. Custom WAL Resource Managers" /><link rel="next" href="btree.html" title="65.1. B-Tree 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">Chapter 65. Built-in Index Access Methods</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="custom-rmgr.html" title="64.2. Custom WAL Resource Managers">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="internals.html" title="Part VII. Internals">Up</a></td><th width="60%" align="center">Part VII. Internals</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 18.0 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="btree.html" title="65.1. B-Tree Indexes">Next</a></td></tr></table><hr /></div><div class="chapter" id="INDEXTYPES"><div class="titlepage"><div><div><h2 class="title">Chapter 65. Built-in Index Access Methods</h2></div></div></div><div class="toc"><p><strong>Table of Contents</strong></p><dl class="toc"><dt><span class="sect1"><a href="btree.html">65.1. B-Tree Indexes</a></span></dt><dd><dl><dt><span class="sect2"><a href="btree.html#BTREE-INTRO">65.1.1. Introduction</a></span></dt><dt><span class="sect2"><a href="btree.html#BTREE-BEHAVIOR">65.1.2. Behavior of B-Tree Operator Classes</a></span></dt><dt><span class="sect2"><a href="btree.html#BTREE-SUPPORT-FUNCS">65.1.3. B-Tree Support Functions</a></span></dt><dt><span class="sect2"><a href="btree.html#BTREE-IMPLEMENTATION">65.1.4. Implementation</a></span></dt></dl></dd><dt><span class="sect1"><a href="gist.html">65.2. GiST Indexes</a></span></dt><dd><dl><dt><span class="sect2"><a href="gist.html#GIST-INTRO">65.2.1. Introduction</a></span></dt><dt><span class="sect2"><a href="gist.html#GIST-BUILTIN-OPCLASSES">65.2.2. Built-in Operator Classes</a></span></dt><dt><span class="sect2"><a href="gist.html#GIST-EXTENSIBILITY">65.2.3. Extensibility</a></span></dt><dt><span class="sect2"><a href="gist.html#GIST-IMPLEMENTATION">65.2.4. Implementation</a></span></dt><dt><span class="sect2"><a href="gist.html#GIST-EXAMPLES">65.2.5. Examples</a></span></dt></dl></dd><dt><span class="sect1"><a href="spgist.html">65.3. SP-GiST Indexes</a></span></dt><dd><dl><dt><span class="sect2"><a href="spgist.html#SPGIST-INTRO">65.3.1. Introduction</a></span></dt><dt><span class="sect2"><a href="spgist.html#SPGIST-BUILTIN-OPCLASSES">65.3.2. Built-in Operator Classes</a></span></dt><dt><span class="sect2"><a href="spgist.html#SPGIST-EXTENSIBILITY">65.3.3. Extensibility</a></span></dt><dt><span class="sect2"><a href="spgist.html#SPGIST-IMPLEMENTATION">65.3.4. Implementation</a></span></dt><dt><span class="sect2"><a href="spgist.html#SPGIST-EXAMPLES">65.3.5. Examples</a></span></dt></dl></dd><dt><span class="sect1"><a href="gin.html">65.4. GIN Indexes</a></span></dt><dd><dl><dt><span class="sect2"><a href="gin.html#GIN-INTRO">65.4.1. Introduction</a></span></dt><dt><span class="sect2"><a href="gin.html#GIN-BUILTIN-OPCLASSES">65.4.2. Built-in Operator Classes</a></span></dt><dt><span class="sect2"><a href="gin.html#GIN-EXTENSIBILITY">65.4.3. Extensibility</a></span></dt><dt><span class="sect2"><a href="gin.html#GIN-IMPLEMENTATION">65.4.4. Implementation</a></span></dt><dt><span class="sect2"><a href="gin.html#GIN-TIPS">65.4.5. GIN Tips and Tricks</a></span></dt><dt><span class="sect2"><a href="gin.html#GIN-LIMIT">65.4.6. Limitations</a></span></dt><dt><span class="sect2"><a href="gin.html#GIN-EXAMPLES">65.4.7. Examples</a></span></dt></dl></dd><dt><span class="sect1"><a href="brin.html">65.5. BRIN Indexes</a></span></dt><dd><dl><dt><span class="sect2"><a href="brin.html#BRIN-INTRO">65.5.1. Introduction</a></span></dt><dt><span class="sect2"><a href="brin.html#BRIN-BUILTIN-OPCLASSES">65.5.2. Built-in Operator Classes</a></span></dt><dt><span class="sect2"><a href="brin.html#BRIN-EXTENSIBILITY">65.5.3. Extensibility</a></span></dt></dl></dd><dt><span class="sect1"><a href="hash-index.html">65.6. Hash Indexes</a></span></dt><dd><dl><dt><span class="sect2"><a href="hash-index.html#HASH-INTRO">65.6.1. Overview</a></span></dt><dt><span class="sect2"><a href="hash-index.html#HASH-IMPLEMENTATION">65.6.2. Implementation</a></span></dt></dl></dd></dl></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="custom-rmgr.html" title="64.2. Custom WAL Resource Managers">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="internals.html" title="Part VII. Internals">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="btree.html" title="65.1. B-Tree Indexes">Next</a></td></tr><tr><td width="40%" align="left" valign="top">64.2. Custom WAL Resource Managers </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 18.0 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 65.1. B-Tree Indexes</td></tr></table></div></body></html>
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