public function DatabaseBackend::isEmpty

Implements Drupal\Core\Cache\CacheBackendInterface::isEmpty().

Overrides CacheBackendInterface::isEmpty

File

drupal/core/lib/Drupal/Core/Cache/DatabaseBackend.php, line 393
Definition of Drupal\Core\Cache\DatabaseBackend.

Class

DatabaseBackend
Defines a default cache implementation.

Namespace

Drupal\Core\Cache

Code

public function isEmpty() {
  $this
    ->garbageCollection();
  $query = $this->connection
    ->select($this->bin);
  $query
    ->addExpression('1');
  try {
    $result = $query
      ->range(0, 1)
      ->execute()
      ->fetchField();
  } catch (\Exception $e) {
    $this
      ->catchException($e);
  }
  return empty($result);
}