public function DatabaseBackend::schemaDefinition in Zircon Profile 8
Same name and namespace in other branches
- 8.0 core/lib/Drupal/Core/Cache/DatabaseBackend.php \Drupal\Core\Cache\DatabaseBackend::schemaDefinition()
Defines the schema for the {cache_*} bin tables.
1 call to DatabaseBackend::schemaDefinition()
- DatabaseBackend::ensureBinExists in core/
lib/ Drupal/ Core/ Cache/ DatabaseBackend.php - Check if the cache bin exists and create it if not.
File
- core/
lib/ Drupal/ Core/ Cache/ DatabaseBackend.php, line 426 - Contains \Drupal\Core\Cache\DatabaseBackend.
Class
- DatabaseBackend
- Defines a default cache implementation.
Namespace
Drupal\Core\CacheCode
public function schemaDefinition() {
$schema = array(
'description' => 'Storage for the cache API.',
'fields' => array(
'cid' => array(
'description' => 'Primary Key: Unique cache ID.',
'type' => 'varchar_ascii',
'length' => 255,
'not null' => TRUE,
'default' => '',
'binary' => TRUE,
),
'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 ' . Cache::PERMANENT . ' for never.',
'type' => 'int',
'not null' => TRUE,
'default' => 0,
),
'created' => array(
'description' => 'A timestamp with millisecond precision indicating when the cache entry was created.',
'type' => 'numeric',
'precision' => 14,
'scale' => 3,
'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' => array(
'description' => 'The tag invalidation checksum when this entry was saved.',
'type' => 'varchar_ascii',
'length' => 255,
'not null' => TRUE,
),
),
'indexes' => array(
'expire' => array(
'expire',
),
),
'primary key' => array(
'cid',
),
);
return $schema;
}