php-doc-en/reference/pdo_mysql/constants.xml

<?xml version='1.0' encoding="utf-8"?>
<!-- $Revision$ -->
<section xml:id="pdo-mysql.constants" xmlns="http://docbook.org/ns/docbook">
 &reftitle.constants;
 &pdo.driver-constants;
 <variablelist>
  <varlistentry>
   <term>
    <constant>PDO::MYSQL_ATTR_USE_BUFFERED_QUERY</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <simpara>
     If this attribute is set to &true; on a
     <classname>PDOStatement</classname>, the MySQL driver will use the
     buffered versions of the MySQL API.  If you're writing portable code, you
     should use <function>PDOStatement::fetchAll</function> instead.
    </simpara>
    <para>
     <example><title>Forcing queries to be buffered in mysql</title>
     <programlisting role='php'>
<![CDATA[
<?php
if ($db->getAttribute(PDO::ATTR_DRIVER_NAME) == 'mysql') {
    $stmt = $db->prepare('select * from foo',
        array(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY => true));
} else {
    die("my application only works with mysql; I should use \$stmt->fetchAll() instead");
}
?>
]]>
      </programlisting>
     </example>
    </para>
   </listitem>
  </varlistentry>
  <varlistentry>
   <term>
    <constant>PDO::MYSQL_ATTR_LOCAL_INFILE</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Enable <literal>LOAD LOCAL INFILE</literal>.
    </para>
    <para>
     Note, this constant can only be used in the <parameter>driver_options</parameter> 
     array when constructing a new database handle.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry>
   <term>
    <constant>PDO::MYSQL_ATTR_INIT_COMMAND</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Command to execute when connecting to the MySQL server. Will
     automatically be re-executed when reconnecting.
    </para>
    <para>
     Note, this constant can only be used in the <parameter>driver_options</parameter> 
     array when constructing a new database handle.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry>
   <term>
    <constant>PDO::MYSQL_ATTR_READ_DEFAULT_FILE</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Read options from the named option file instead of from
     <filename>my.cnf</filename>. This option is not available if 
     mysqlnd is used, because mysqlnd does not read the mysql 
     configuration files.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry>
   <term>
    <constant>PDO::MYSQL_ATTR_READ_DEFAULT_GROUP</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Read options from the named group from <filename>my.cnf</filename> or the
     file specified with <constant>MYSQL_READ_DEFAULT_FILE</constant>. This option 
     is not available if mysqlnd is used, because mysqlnd does not read the mysql 
     configuration files.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry>
   <term>
    <constant>PDO::MYSQL_ATTR_MAX_BUFFER_SIZE</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Maximum buffer size. Defaults to 1 MiB. This constant is not supported when 
     compiled against mysqlnd.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry>
   <term>
    <constant>PDO::MYSQL_ATTR_DIRECT_QUERY</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Perform direct queries, don't use prepared statements.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry>
   <term>
    <constant>PDO::MYSQL_ATTR_FOUND_ROWS</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Return the number of found (matched) rows, not the 
     number of changed rows.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry>
   <term>
    <constant>PDO::MYSQL_ATTR_IGNORE_SPACE</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Permit spaces after function names. Makes all functions 
     names reserved words.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry>
   <term>
    <constant>PDO::MYSQL_ATTR_COMPRESS</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Enable network communication compression. This is not supported when 
     compiled against mysqlnd.
    </para>
   </listitem>
  </varlistentry>
 </variablelist>
</section>

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