<para><xref linkend="ST_AsEWKT" />, <xref linkend="ST_Buffer" />, <xref linkend="ST_DWithin" />, <xref linkend="ST_GeomFromEWKT" />,<xref linkend="ST_GeomFromText" />, <xref linkend="ST_SRID" /></para>
</refsection>
</refentry>
- <varlistentry>
- <term>ST_extent(geometry set)</term>
-
- <listitem>
- <para>The extent() function is an "aggregate" function in the
- terminology of PostgreSQL. That means that it operators on lists
- of data, in the same way the sum() and mean() functions do. For
- example, "SELECT ST_Extent(GEOM) FROM GEOMTABLE" will return a
- BOX3D giving the maximum extent of all features in the table.
- Similarly, "SELECT ST_Extent(GEOM) FROM GEOMTABLE GROUP BY
- CATEGORY" will return one extent result for each category.</para>
- </listitem>
- </varlistentry>
-
+
<refentry id="ST_Extent">
<refnamediv>
<refname>ST_Extent</refname>