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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>Chapter 59. Genetic Query Optimizer</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 V1.79.1" /><link rel="prev" href="custom-scan-execution.html" title="58.3. Executing Custom Scans" /><link rel="next" href="geqo-intro.html" title="59.1. Query Handling as a Complex Optimization Problem" /></head><body id="docContent" class="container-fluid col-10"><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">Chapter 59. Genetic Query Optimizer</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="custom-scan-execution.html" title="58.3. Executing Custom Scans">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 13.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="geqo-intro.html" title="59.1. Query Handling as a Complex Optimization Problem">Next</a></td></tr></table><hr></hr></div><div class="chapter" id="GEQO"><div class="titlepage"><div><div><h2 class="title">Chapter 59. Genetic Query Optimizer</h2></div></div></div><div class="toc"><p><strong>Table of Contents</strong></p><dl class="toc"><dt><span class="sect1"><a href="geqo-intro.html">59.1. Query Handling as a Complex Optimization Problem</a></span></dt><dt><span class="sect1"><a href="geqo-intro2.html">59.2. Genetic Algorithms</a></span></dt><dt><span class="sect1"><a href="geqo-pg-intro.html">59.3. Genetic Query Optimization (<acronym class="acronym">GEQO</acronym>) in PostgreSQL</a></span></dt><dd><dl><dt><span class="sect2"><a href="geqo-pg-intro.html#id-1.10.12.5.6">59.3.1. Generating Possible Plans with <acronym class="acronym">GEQO</acronym></a></span></dt><dt><span class="sect2"><a href="geqo-pg-intro.html#GEQO-FUTURE">59.3.2. Future Implementation Tasks for
<span class="productname">PostgreSQL</span> <acronym class="acronym">GEQO</acronym></a></span></dt></dl></dd><dt><span class="sect1"><a href="geqo-biblio.html">59.4. Further Reading</a></span></dt></dl></div><p>
</p><div class="note"><h3 class="title">Author</h3><p>
Written by Martin Utesch (<code class="email"><<a class="email" href="mailto:utesch@aut.tu-freiberg.de">utesch@aut.tu-freiberg.de</a>></code>)
for the Institute of Automatic Control at the University of Mining and Technology in Freiberg, Germany.
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