function system_schema_cache_8007

The cache schema corresponding to Drupal 8.0.

Helper function to add cache tables in the Drupal 7 to 8 upgrade path without relying on system_schema(), which may change with future updates.

File

drupal/core/modules/system/system.install, line 1147

Install, update and uninstall functions for the system module.

Code

function system_schema_cache_8007() {
  return array(
    'description' => 'Generic cache table for caching things not separated out into their own tables. Contributed modules may also use this to store cached items.',
    'fields' => array(
      'cid' => array(
        'description' => 'Primary Key: Unique cache ID.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
      ),
      'data' => array(
        'description' => 'A collection of data to cache.',
        'type' => 'blob',
        'not null' => FALSE,
        'size' => 'big',
      ),
      'expire' => array(
        'description' => 'A Unix timestamp indicating when the cache entry should expire, or 0 for never.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'created' => array(
        'description' => 'A Unix timestamp indicating when the cache entry was created.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'serialized' => array(
        'description' => 'A flag to indicate whether content is serialized (1) or not (0).',
        'type' => 'int',
        'size' => 'small',
        'not null' => TRUE,
        'default' => 0,
      ),
      'tags' => array(
        'description' => 'Space-separated list of cache tags for this entry.',
        'type' => 'text',
        'size' => 'big',
        'not null' => FALSE,
      ),
      'checksum_invalidations' => array(
        'description' => 'The tag invalidation sum when this entry was saved.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'checksum_deletions' => array(
        'description' => 'The tag deletion sum when this entry was saved.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
    ),
    'indexes' => array(
      'expire' => array(
        'expire',
      ),
    ),
    'primary key' => array(
      'cid',
    ),
  );
}