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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<chapter xml:id="mysqli.notes" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<title>Notes</title>
<para>Some implementation notes:</para>
<orderedlist>
<listitem>
<para>
Support was added for <literal>MYSQL_TYPE_GEOMETRY</literal>
to the MySQLi extension in PHP 5.3.
</para>
</listitem>
<listitem>
<para>
Note there are different internal implementations within
<literal>libmysqlclient</literal> and <literal>mysqlnd</literal> for handling
columns of type <literal>MYSQL_TYPE_GEOMETRY</literal>. Generally speaking,
<literal>mysqlnd</literal> will allocate significantly less memory. For
example, if there is a <literal>POINT</literal>
column in a result set, <literal>libmysqlclient</literal> may pre-allocate up
to 4GB of RAM although less than 50 bytes are
needed for holding a <literal>POINT</literal> column in memory. Memory
allocation is much lower, less than 50 bytes, if
using <literal>mysqlnd</literal>.
</para>
</listitem>
</orderedlist>
</chapter>
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