that should be an XML element called “log_verbs” in your DB config.

Unfortunately I also forgot that I modified this piece of code, which puts the log_verbs config into logConfig:

if (null === $logConfig) {
// first time function is executed
// query logger needs to be configured
if (array_key_exists(“log”, $this->_config)) {
$logConfig['enabled'] = (bool) $this->_config['log'];
}
if (array_key_exists(‘log_file’, $this->_config)) {
$logConfig['file_name'] = $this->_config['log_file'];
}
if (array_key_exists(‘log_verbs’, $this->_config)) {
$logConfig['log_verbs'] = $this->_config['log_verbs'];
} else {
$logConfig['log_verbs'] = “SELECT,UPDATE,INSERT,DELETE”;
}
}

I also added a bit to filter out certain SQL verbs. It’s not very efficient, but running in debug mode seldom is

* Add to local.xml. Comma-separated list of SQL verbs to log:

SELECT,INSERT

* Above the “//build the log message” in the above code:

/* Filter SQL verbs */
if ( strlen( $logConfig['log_verbs'] ) ) {
$arr = explode( “,”, $logConfig['log_verbs'] );

$words = explode(‘ ‘, $sql);
$verb = $words[0];

if ( !in_array( $verb, $arr ) ) {
return $this;
}
}

* Add this

<log>1</log>
<log_file><![CDATA[../../../var/debug/sql.txt]]></log_file>

e.g. :

<default_setup>
<connection>
<host><![CDATA[localhost]]></host>
<username><![CDATA[magento]]></username>
<password><![CDATA[<database_password>]]></password>
<dbname><![CDATA[<database_name>]]></dbname>
<active>1</active>
<log>1</log>
<log_file><![CDATA[/path/to/magento/var/debug/sql.txt]]></log_file>
</connection>
</default_setup>

I have slightly enhanced your code to get control over query logging through the configuration file. Just replace your code with :

$this->_logQuery($sql, $bind);

and add this at the bottom of the /path/to/magento/lib/Varien/Db/Adapter/Pdo/Mysql.php file :

protected function _logQuery($sql, $bind = array(), $result = null)
{
// configuration of the query logger
static $logConfig = null;

if (null === $logConfig) {
// first time function is executed
// query logger needs to be configured
if (array_key_exists(‘log’, $this->_config)) {
$logConfig['enabled'] = (bool) $this->_config['log'];
}
if (array_key_exists(‘log_file’, $this->_config)) {
$logConfig['file_name'] = $this->_config['log_file'];
}
}

if (!$logConfig['enabled']) {
// query logger is not enabled, nothing to do
return $this;
}

// build the log message
// note: from this part on, code is inspired by _debugStat() and
// _debugWriteFile() methods of the Varien_Db_Adapter_Pdo_Mysql
// class, with only small modifications
$code = ‘## ‘ . getmypid() . ‘ ## ‘;
$nl = “\n”;

$code .= ‘QUERY’ . $nl;
$code .= ‘SQL: ‘ . $sql . $nl;
if ($bind) {
$code .= ‘BIND: ‘ . print_r($bind, true) . $nl;
}
if ($result instanceof Zend_Db_Statement_Pdo) {
$code .= ‘AFF: ‘ . $result->rowCount() . $nl;
}
$code .= $nl . $nl;

if (!array_key_exists(‘adapter’, $logConfig)) {
$logConfig['adapter'] = new Varien_Io_File();
$dir = $logConfig['adapter']->dirname($logConfig['file_name']);
$logConfig['adapter']->checkAndCreateFolder($dir);
$logConfig['adapter']->open(array(‘path’ => $dir));
$logConfig['file_name'] = basename($logConfig['file_name']);
}

$logConfig['adapter']->streamOpen($logConfig['file_name'], ‘a’);
$logConfig['adapter']->streamLock();
$logConfig['adapter']->streamWrite($code);
$logConfig['adapter']->streamUnlock();
$logConfig['adapter']->streamClose();

return $this;
}

Now, edit your /path/to/magento/app/etc/local.xml and add these two lines to your database connection configuration :

1

like in the following :

<![CDATA[]]>
<![CDATA[]]>
1
1

Now, all queries can be seen from that sql.txt file. Sweet!

By the way, did you notice this ** HUGE ** security hole: for some reason that I do not understand, on Magento version 1.3.2.3 (maybe this behaviour has changed in newer versions), the default value of Varien_Db_Adapter_Pdo_Mysql::$_debugFile is ‘var/debug/sql.txt’. If you have multiple stores configured like I do , this file will be located in the DOCUMENT_ROOT of your website (that is /path/to/magento/stores/store1/var/store/sql.txt), hence, making this file ** PUBLIC ** at this URL : http://store1.your-magento-shop.com/var/debug/sql.txt !

Knowing this file may contain database credentials (including your database password), I consider this as a very serious threat to the security of your database. Thus, I ** STRONGLY ** recommend to keep this file out of the DOCUMENT_ROOT of the web server by overriding this value, or at least to protect this directory with a .htaccess file.

Yet, you don’t have to worry too much if you only have 1 store configured, as the /path/to/magento_dir/var directory is already protected with a .htacces file.

Thanks again for that code snippet!

Cheers!