Select::__clone

public Select::__clone()

public function __clone() {
  // On cloning, also clone the dependent objects. However, we do not
  // want to clone the database connection object as that would duplicate the
  // connection itself.

  $this->condition = clone($this->condition);
  $this->having = clone($this->having);
  foreach ($this->union as $key => $aggregate) {
    $this->union[$key]['query'] = clone($aggregate['query']);
  }
}