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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>Full Text Search</TITLE
><META
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CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
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TITLE="PostgreSQL 9.2.24 Documentation"
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TITLE="Examining Index Usage"
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TITLE="Introduction"
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CONTENT="2017-11-06T22:43:11"></HEAD
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>PostgreSQL 9.2.24 Documentation</A
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><TR
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TITLE="Examining Index Usage"
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><DIV
CLASS="CHAPTER"
><H1
><A
NAME="TEXTSEARCH"
></A
>Chapter 12. Full Text Search</H1
><DIV
CLASS="TOC"
><DL
><DT
><B
>Table of Contents</B
></DT
><DT
>12.1. <A
HREF="textsearch-intro.html"
>Introduction</A
></DT
><DD
><DL
><DT
>12.1.1. <A
HREF="textsearch-intro.html#TEXTSEARCH-DOCUMENT"
>What Is a Document?</A
></DT
><DT
>12.1.2. <A
HREF="textsearch-intro.html#TEXTSEARCH-MATCHING"
>Basic Text Matching</A
></DT
><DT
>12.1.3. <A
HREF="textsearch-intro.html#TEXTSEARCH-INTRO-CONFIGURATIONS"
>Configurations</A
></DT
></DL
></DD
><DT
>12.2. <A
HREF="textsearch-tables.html"
>Tables and Indexes</A
></DT
><DD
><DL
><DT
>12.2.1. <A
HREF="textsearch-tables.html#TEXTSEARCH-TABLES-SEARCH"
>Searching a Table</A
></DT
><DT
>12.2.2. <A
HREF="textsearch-tables.html#TEXTSEARCH-TABLES-INDEX"
>Creating Indexes</A
></DT
></DL
></DD
><DT
>12.3. <A
HREF="textsearch-controls.html"
>Controlling Text Search</A
></DT
><DD
><DL
><DT
>12.3.1. <A
HREF="textsearch-controls.html#TEXTSEARCH-PARSING-DOCUMENTS"
>Parsing Documents</A
></DT
><DT
>12.3.2. <A
HREF="textsearch-controls.html#TEXTSEARCH-PARSING-QUERIES"
>Parsing Queries</A
></DT
><DT
>12.3.3. <A
HREF="textsearch-controls.html#TEXTSEARCH-RANKING"
>Ranking Search Results</A
></DT
><DT
>12.3.4. <A
HREF="textsearch-controls.html#TEXTSEARCH-HEADLINE"
>Highlighting Results</A
></DT
></DL
></DD
><DT
>12.4. <A
HREF="textsearch-features.html"
>Additional Features</A
></DT
><DD
><DL
><DT
>12.4.1. <A
HREF="textsearch-features.html#TEXTSEARCH-MANIPULATE-TSVECTOR"
>Manipulating Documents</A
></DT
><DT
>12.4.2. <A
HREF="textsearch-features.html#TEXTSEARCH-MANIPULATE-TSQUERY"
>Manipulating Queries</A
></DT
><DT
>12.4.3. <A
HREF="textsearch-features.html#TEXTSEARCH-UPDATE-TRIGGERS"
>Triggers for Automatic Updates</A
></DT
><DT
>12.4.4. <A
HREF="textsearch-features.html#TEXTSEARCH-STATISTICS"
>Gathering Document Statistics</A
></DT
></DL
></DD
><DT
>12.5. <A
HREF="textsearch-parsers.html"
>Parsers</A
></DT
><DT
>12.6. <A
HREF="textsearch-dictionaries.html"
>Dictionaries</A
></DT
><DD
><DL
><DT
>12.6.1. <A
HREF="textsearch-dictionaries.html#TEXTSEARCH-STOPWORDS"
>Stop Words</A
></DT
><DT
>12.6.2. <A
HREF="textsearch-dictionaries.html#TEXTSEARCH-SIMPLE-DICTIONARY"
>Simple Dictionary</A
></DT
><DT
>12.6.3. <A
HREF="textsearch-dictionaries.html#TEXTSEARCH-SYNONYM-DICTIONARY"
>Synonym Dictionary</A
></DT
><DT
>12.6.4. <A
HREF="textsearch-dictionaries.html#TEXTSEARCH-THESAURUS"
>Thesaurus Dictionary</A
></DT
><DT
>12.6.5. <A
HREF="textsearch-dictionaries.html#TEXTSEARCH-ISPELL-DICTIONARY"
><SPAN
CLASS="APPLICATION"
>Ispell</SPAN
> Dictionary</A
></DT
><DT
>12.6.6. <A
HREF="textsearch-dictionaries.html#TEXTSEARCH-SNOWBALL-DICTIONARY"
><SPAN
CLASS="APPLICATION"
>Snowball</SPAN
> Dictionary</A
></DT
></DL
></DD
><DT
>12.7. <A
HREF="textsearch-configuration.html"
>Configuration Example</A
></DT
><DT
>12.8. <A
HREF="textsearch-debugging.html"
>Testing and Debugging Text Search</A
></DT
><DD
><DL
><DT
>12.8.1. <A
HREF="textsearch-debugging.html#TEXTSEARCH-CONFIGURATION-TESTING"
>Configuration Testing</A
></DT
><DT
>12.8.2. <A
HREF="textsearch-debugging.html#TEXTSEARCH-PARSER-TESTING"
>Parser Testing</A
></DT
><DT
>12.8.3. <A
HREF="textsearch-debugging.html#TEXTSEARCH-DICTIONARY-TESTING"
>Dictionary Testing</A
></DT
></DL
></DD
><DT
>12.9. <A
HREF="textsearch-indexes.html"
>GiST and GIN Index Types</A
></DT
><DT
>12.10. <A
HREF="textsearch-psql.html"
><SPAN
CLASS="APPLICATION"
>psql</SPAN
> Support</A
></DT
><DT
>12.11. <A
HREF="textsearch-limitations.html"
>Limitations</A
></DT
><DT
>12.12. <A
HREF="textsearch-migration.html"
>Migration from Pre-8.3 Text Search</A
></DT
></DL
></DIV
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>Prev</A
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><A
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>Home</A
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>Next</A
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><TR
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>Examining Index Usage</TD
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