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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 12. Full Text Search</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="indexes-examine.html" title="11.12. Examining Index Usage" /><link rel="next" href="textsearch-intro.html" title="12.1. Introduction" /></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 12. Full Text Search</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="indexes-examine.html" title="11.12. Examining Index Usage">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="sql.html" title="Part II. The SQL Language">Up</a></td><th width="60%" align="center">Part II. The SQL Language</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="textsearch-intro.html" title="12.1. Introduction">Next</a></td></tr></table><hr /></div><div class="chapter" id="TEXTSEARCH"><div class="titlepage"><div><div><h2 class="title">Chapter 12. Full Text Search</h2></div></div></div><div class="toc"><p><strong>Table of Contents</strong></p><dl class="toc"><dt><span class="sect1"><a href="textsearch-intro.html">12.1. Introduction</a></span></dt><dd><dl><dt><span class="sect2"><a href="textsearch-intro.html#TEXTSEARCH-DOCUMENT">12.1.1. What Is a Document?</a></span></dt><dt><span class="sect2"><a href="textsearch-intro.html#TEXTSEARCH-MATCHING">12.1.2. Basic Text Matching</a></span></dt><dt><span class="sect2"><a href="textsearch-intro.html#TEXTSEARCH-INTRO-CONFIGURATIONS">12.1.3. Configurations</a></span></dt></dl></dd><dt><span class="sect1"><a href="textsearch-tables.html">12.2. Tables and Indexes</a></span></dt><dd><dl><dt><span class="sect2"><a href="textsearch-tables.html#TEXTSEARCH-TABLES-SEARCH">12.2.1. Searching a Table</a></span></dt><dt><span class="sect2"><a href="textsearch-tables.html#TEXTSEARCH-TABLES-INDEX">12.2.2. Creating Indexes</a></span></dt></dl></dd><dt><span class="sect1"><a href="textsearch-controls.html">12.3. Controlling Text Search</a></span></dt><dd><dl><dt><span class="sect2"><a href="textsearch-controls.html#TEXTSEARCH-PARSING-DOCUMENTS">12.3.1. Parsing Documents</a></span></dt><dt><span class="sect2"><a href="textsearch-controls.html#TEXTSEARCH-PARSING-QUERIES">12.3.2. Parsing Queries</a></span></dt><dt><span class="sect2"><a href="textsearch-controls.html#TEXTSEARCH-RANKING">12.3.3. Ranking Search Results</a></span></dt><dt><span class="sect2"><a href="textsearch-controls.html#TEXTSEARCH-HEADLINE">12.3.4. Highlighting Results</a></span></dt></dl></dd><dt><span class="sect1"><a href="textsearch-features.html">12.4. Additional Features</a></span></dt><dd><dl><dt><span class="sect2"><a href="textsearch-features.html#TEXTSEARCH-MANIPULATE-TSVECTOR">12.4.1. Manipulating Documents</a></span></dt><dt><span class="sect2"><a href="textsearch-features.html#TEXTSEARCH-MANIPULATE-TSQUERY">12.4.2. Manipulating Queries</a></span></dt><dt><span class="sect2"><a href="textsearch-features.html#TEXTSEARCH-UPDATE-TRIGGERS">12.4.3. Triggers for Automatic Updates</a></span></dt><dt><span class="sect2"><a href="textsearch-features.html#TEXTSEARCH-STATISTICS">12.4.4. Gathering Document Statistics</a></span></dt></dl></dd><dt><span class="sect1"><a href="textsearch-parsers.html">12.5. Parsers</a></span></dt><dt><span class="sect1"><a href="textsearch-dictionaries.html">12.6. Dictionaries</a></span></dt><dd><dl><dt><span class="sect2"><a href="textsearch-dictionaries.html#TEXTSEARCH-STOPWORDS">12.6.1. Stop Words</a></span></dt><dt><span class="sect2"><a href="textsearch-dictionaries.html#TEXTSEARCH-SIMPLE-DICTIONARY">12.6.2. Simple Dictionary</a></span></dt><dt><span class="sect2"><a href="textsearch-dictionaries.html#TEXTSEARCH-SYNONYM-DICTIONARY">12.6.3. Synonym Dictionary</a></span></dt><dt><span class="sect2"><a href="textsearch-dictionaries.html#TEXTSEARCH-THESAURUS">12.6.4. Thesaurus Dictionary</a></span></dt><dt><span class="sect2"><a href="textsearch-dictionaries.html#TEXTSEARCH-ISPELL-DICTIONARY">12.6.5. <span class="application">Ispell</span> Dictionary</a></span></dt><dt><span class="sect2"><a href="textsearch-dictionaries.html#TEXTSEARCH-SNOWBALL-DICTIONARY">12.6.6. <span class="application">Snowball</span> Dictionary</a></span></dt></dl></dd><dt><span class="sect1"><a href="textsearch-configuration.html">12.7. Configuration Example</a></span></dt><dt><span class="sect1"><a href="textsearch-debugging.html">12.8. Testing and Debugging Text Search</a></span></dt><dd><dl><dt><span class="sect2"><a href="textsearch-debugging.html#TEXTSEARCH-CONFIGURATION-TESTING">12.8.1. Configuration Testing</a></span></dt><dt><span class="sect2"><a href="textsearch-debugging.html#TEXTSEARCH-PARSER-TESTING">12.8.2. Parser Testing</a></span></dt><dt><span class="sect2"><a href="textsearch-debugging.html#TEXTSEARCH-DICTIONARY-TESTING">12.8.3. Dictionary Testing</a></span></dt></dl></dd><dt><span class="sect1"><a href="textsearch-indexes.html">12.9. Preferred Index Types for Text Search</a></span></dt><dt><span class="sect1"><a href="textsearch-psql.html">12.10. <span class="application">psql</span> Support</a></span></dt><dt><span class="sect1"><a href="textsearch-limitations.html">12.11. Limitations</a></span></dt></dl></div><a id="id-1.5.11.2" class="indexterm"></a><a id="id-1.5.11.3" class="indexterm"></a></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="indexes-examine.html" title="11.12. Examining Index Usage">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="sql.html" title="Part II. The SQL Language">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="textsearch-intro.html" title="12.1. Introduction">Next</a></td></tr><tr><td width="40%" align="left" valign="top">11.12. Examining Index Usage </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.4 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 12.1. Introduction</td></tr></table></div></body></html>
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