function system_update_7065

Remove the default value for sid.

Related topics

File

modules/system/system.install, line 3100

Code

function system_update_7065() {
    $spec = array(
        'description' => "A session ID. The value is generated by Drupal's session handlers.",
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
    );
    db_drop_primary_key('sessions');
    db_change_field('sessions', 'sid', 'sid', $spec, array(
        'primary key' => array(
            'sid',
            'ssid',
        ),
    ));
    // Delete any sessions with empty session ID.
    db_delete('sessions')->condition('sid', '')
        ->execute();
}