The cache schema corresponding to system_update_7054.
Drupal 7 adds several new cache tables. Since they all have identical schema this helper function allows them to re-use the same definition, without relying on system_schema(), which may change with future updates.
function system_schema_cache_7054() {
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,
),
),
'indexes' => array(
'expire' => array(
'expire',
),
),
'primary key' => array(
'cid',
),
);
}