file_schema

file_schema()

function file_schema() {
  $schema['file_usage'] = array(
    'description' => 'Track where a file is used.',
    'fields' => array(
      'fid' => array(
        'description' => 'File ID.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'module' => array(
        'description' => 'The name of the module that is using the file.',
        'type' => 'varchar_ascii',
        'length' => DRUPAL_EXTENSION_NAME_MAX_LENGTH,
        'not null' => TRUE,
        'default' => '',
      ),
      'type' => array(
        'description' => 'The name of the object type in which the file is used.',
        'type' => 'varchar_ascii',
        'length' => 64,
        'not null' => TRUE,
        'default' => '',
      ),
      'id' => array(
        'description' => 'The primary key of the object using the file.',
        'type' => 'varchar_ascii',
        'length' => 64,
        'not null' => TRUE,
        'default' => 0,
      ),
      'count' => array(
        'description' => 'The number of times this file is used by this object.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ),
    ),
    'primary key' => array('fid', 'type', 'id', 'module'),
    'indexes' => array(
      'type_id' => array('type', 'id'),
      'fid_count' => array('fid', 'count'),
      'fid_module' => array('fid', 'module'),
    ),
  );
  return $schema;
}