function DrupalDatabaseCache::isEmpty in Drupal 7

Implements DrupalCacheInterface::isEmpty().

Overrides DrupalCacheInterface::isEmpty

1 method overrides DrupalDatabaseCache::isEmpty()

DrupalFakeCache::isEmpty in includes/cache-install.inc

Overrides DrupalDatabaseCache::isEmpty().

File

includes/cache.inc, line 560

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);
}