public function DatabaseCacheTagsChecksum::schemaDefinition

public DatabaseCacheTagsChecksum::schemaDefinition()

Defines the schema for the {cachetags} table.

File

core/lib/Drupal/Core/Cache/DatabaseCacheTagsChecksum.php, line 167

Class

DatabaseCacheTagsChecksum

Cache tags invalidations checksum implementation that uses the database.

Namespace

Drupal\Core\Cache

Code

public function schemaDefinition() {
  $schema = array(
    'description' => 'Cache table for tracking cache tag invalidations.',
    'fields' => array(
      'tag' => array(
        'description' => 'Namespace-prefixed tag string.',
        'type' => 'varchar_ascii',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
      ),
      'invalidations' => array(
        'description' => 'Number incremented when the tag is invalidated.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
    ),
    'primary key' => array('tag'),
  );
  return $schema;
}