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<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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