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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 >Examples</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REV="MADE" HREF="mailto:pgsql-docs@postgresql.org"><LINK REL="HOME" TITLE="PostgreSQL 9.2.24 Documentation" HREF="index.html"><LINK REL="UP" TITLE="GiST Indexes" HREF="gist.html"><LINK REL="PREVIOUS" TITLE="Implementation" HREF="gist-implementation.html"><LINK REL="NEXT" TITLE="SP-GiST Indexes" HREF="spgist.html"><LINK REL="STYLESHEET" TYPE="text/css" HREF="stylesheet.css"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"><META NAME="creation" CONTENT="2017-11-06T22:43:11"></HEAD ><BODY CLASS="SECT1" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="5" ALIGN="center" VALIGN="bottom" ><A HREF="index.html" >PostgreSQL 9.2.24 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="Implementation" HREF="gist-implementation.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="gist.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" >Chapter 53. GiST Indexes</TD ><TD WIDTH="20%" ALIGN="right" VALIGN="top" ><A TITLE="SP-GiST Indexes" HREF="spgist.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="GIST-EXAMPLES" >53.4. Examples</A ></H1 ><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 <TT CLASS="TYPE" >tsvector</TT > and <TT CLASS="TYPE" >tsquery</TT >) as well as R-Tree equivalent functionality for some of the built-in geometric data types (see <TT CLASS="FILENAME" >src/backend/access/gist/gistproc.c</TT >). The following <TT CLASS="FILENAME" >contrib</TT > modules also contain <ACRONYM CLASS="ACRONYM" >GiST</ACRONYM > operator classes: <P ></P ></P><DIV CLASS="VARIABLELIST" ><DL ><DT ><TT CLASS="FILENAME" >btree_gist</TT ></DT ><DD ><P >B-tree equivalent functionality for several data types</P ></DD ><DT ><TT CLASS="FILENAME" >cube</TT ></DT ><DD ><P >Indexing for multidimensional cubes</P ></DD ><DT ><TT CLASS="FILENAME" >hstore</TT ></DT ><DD ><P >Module for storing (key, value) pairs</P ></DD ><DT ><TT CLASS="FILENAME" >intarray</TT ></DT ><DD ><P >RD-Tree for one-dimensional array of int4 values</P ></DD ><DT ><TT CLASS="FILENAME" >ltree</TT ></DT ><DD ><P >Indexing for tree-like structures</P ></DD ><DT ><TT CLASS="FILENAME" >pg_trgm</TT ></DT ><DD ><P >Text similarity using trigram matching</P ></DD ><DT ><TT CLASS="FILENAME" >seg</TT ></DT ><DD ><P >Indexing for <SPAN CLASS="QUOTE" >"float ranges"</SPAN ></P ></DD ></DL ></DIV ><P> </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="gist-implementation.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="spgist.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Implementation</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="gist.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >SP-GiST Indexes</TD ></TR ></TABLE ></DIV ></BODY ></HTML >