function DrupalDatabaseCache::isEmpty

7.x cache.inc DrupalDatabaseCache::isEmpty()

Implements DrupalCacheInterface::isEmpty().

Overrides DrupalCacheInterface::isEmpty

1 method overrides DrupalDatabaseCache::isEmpty()

DrupalFakeCache::isEmpty in drupal-7.x/includes/cache-install.inc: Overrides DrupalDatabaseCache::isEmpty().

File

drupal-7.x/includes/cache.inc, line 545: Functions and interfaces for cache handling.

Class

DrupalDatabaseCache: Defines a default cache implementation.

Code

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