update also did updatedb

Multisite 6.x site. Link 2.5 module needed updating to Link 2.6. The module files had already been updated (all sites' modules are in sites/all/modules).

Right after the You have pending database updates. message, it dived right into database updates!

I don't think those updates are related to the Link module; may have been leftover updates not previously run?

[hulk]$ drush update
Refreshing update status information ...
Done.
Update information last refreshed: Thu, 07/09/2009 - 21:15

Update status information on all installed and enabled Drupal modules:
 Name                      Installed version  Proposed version  Status
 Administration menu       6.x-1.5            6.x-1.5           Up to date
 Advanced help             6.x-1.2            6.x-1.2           Up to date
 Autosave                  6.x-1.1            6.x-1.1           Up to date
 Drupal                    6.13               6.13              Up to date
 Content Construction Kit  6.x-2.4            6.x-2.4           Up to date
 (CCK)
 Date                      6.x-2.2            6.x-2.2           Up to date
 DHTML Menu                6.x-3.5            6.x-3.5           Up to date
 Global Redirect           6.x-1.2            6.x-1.2           Up to date
 Google Analytics          6.x-2.2            6.x-2.2           Up to date
 Link                      6.x-2.6            6.x-2.6           Up to date
 Poormanscron              6.x-1.0            6.x-1.0           Up to date
 Token                     6.x-1.12           6.x-1.12          Up to date
 Viewfield                 6.x-1.x-dev        6.x-1.x-dev       Up to date
 Views                     6.x-2.6            6.x-2.6           Up to date
 Wysiwyg                   6.x-2.0            6.x-2.0           Up to date
 Framework                 6.x-2.4            6.x-2.4           Up to date

No code updates available.                                           [ok]
You have pending database updates. Please run `drush updatedb` or    [warning]
visit update.php in your browser.
drush updateALTER TABLE {content_field_url} CHANGE field_url_url `field_url_url` [success]
VARCHAR(255) DEFAULT NULL
UPDATE {content_field_url} SET field_url_url = NULL WHERE            [success]
field_url_url = '' OR field_url_url = 'N;'
ALTER TABLE {content_field_url} CHANGE field_url_title               [success]
`field_url_title` VARCHAR(255) DEFAULT NULL
UPDATE {content_field_url} SET field_url_title = NULL WHERE          [success]
field_url_title = '' OR field_url_title = 'N;'
ALTER TABLE {content_field_url} CHANGE field_url_attributes          [success]
`field_url_attributes` MEDIUMTEXT DEFAULT NULL
UPDATE {content_field_url} SET field_url_attributes = NULL WHERE     [success]
field_url_attributes = '' OR field_url_attributes =
'N;'
ALTER TABLE {content_type_move_over_law} CHANGE field_link_url       [success]
`field_link_url` VARCHAR(255) DEFAULT NULL
UPDATE {content_type_move_over_law} SET field_link_url = NULL WHERE  [success]
field_link_url = '' OR field_link_url = 'N;'
ALTER TABLE {content_type_move_over_law} CHANGE field_link_title     [success]
`field_link_title` VARCHAR(255) DEFAULT NULL
UPDATE {content_type_move_over_law} SET field_link_title = NULL WHERE[success]
field_link_title = '' OR field_link_title = 'N;'
ALTER TABLE {content_type_move_over_law} CHANGE field_link_attributes[success]
`field_link_attributes` MEDIUMTEXT DEFAULT NULL
UPDATE {content_type_move_over_law} SET field_link_attributes = NULL [success]
WHERE field_link_attributes = '' OR field_link_attributes =
'N;'
Finished performing updates.                                         [ok]
The following updates are pending:

 link module
 6000 - Ensure that content.module is updated before link module.
 6001 - Change the database schema to allow NULL values.

Do you wish to run all pending updates? (y/n): y
[hulk]$ drush updatedb
No database updates required                                         [success]
Finished performing updates.                                         [ok]