Starts logging a given logging key on the specified connection.

Parameters

$logging_key: The logging key to log.

$key: The database connection key for which we want to log.

Return value

DatabaseLog The query log object. Note that the log object does support richer methods than the few exposed through the Database class, so in some cases it may be desirable to access it directly.

See also

DatabaseLog

File

drupal-7.x/includes/database/database.inc, line 1406

Core systems for the database layer.

Class

Database

Primary front-controller for the database system.

Code

final public static function startLog($logging_key, $key = 'default') {
  if (empty(self::$logs[$key])) {
    self::$logs[$key] = new DatabaseLog($key);

    // Every target already active for this connection key needs to have the
    // logging object associated with it.
    if (!empty(self::$connections[$key])) {
      foreach (self::$connections[$key] as $connection) {
        $connection->setLogger(self::$logs[$key]);
      }
    }
  }

  self::$logs[$key]->start($logging_key);
  return self::$logs[$key];
}