Begin logging queries to the specified connection and logging key.

If the specified logging key is already running this method does nothing.

Parameters

$logging_key: The identification key for this log request. By specifying different logging keys we are able to start and stop multiple logging runs simultaneously without them colliding.

File

drupal-7.x/includes/database/log.inc, line 64

Logging classes for the database layer.

Class

DatabaseLog

Database query logger.

Code

public function start($logging_key) {
  if (empty($this->queryLog[$logging_key])) {
    $this->clear($logging_key);
  }
}