public function DatabaseBackend::isEmpty

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

Overrides CacheBackendInterface::isEmpty

1 call to DatabaseBackend::isEmpty()
InstallBackend::isEmpty in drupal/core/lib/Drupal/Core/Cache/InstallBackend.php
Overrides Drupal\Core\Cache\DatabaseBackend::isEmpty().
1 method overrides DatabaseBackend::isEmpty()
InstallBackend::isEmpty in drupal/core/lib/Drupal/Core/Cache/InstallBackend.php
Overrides Drupal\Core\Cache\DatabaseBackend::isEmpty().

File

drupal/core/lib/Drupal/Core/Cache/DatabaseBackend.php, line 337
Definition of Drupal\Core\Cache\DatabaseBackend.

Class

DatabaseBackend
Defines a default cache implementation.

Namespace

Drupal\Core\Cache

Code

public function isEmpty() {
  $this
    ->garbageCollection();
  $query = Database::getConnection()
    ->select($this->bin);
  $query
    ->addExpression('1');
  $result = $query
    ->range(0, 1)
    ->execute()
    ->fetchField();
  return empty($result);
}