12 calls to db_add_field()

db_change_field in drupal-6.x/includes/database.pgsql.inc
Change a field definition.
hook_update_N in documentation-6.x/developer/hooks/install.php
Perform a single update.
system_update_6001 in drupal-6.x/modules/system/system.install
Add version id column to {term_node} to allow taxonomy module to use revisions.
system_update_6010 in drupal-6.x/modules/system/system.install
Add variable replacement for watchdog messages.
system_update_6021 in drupal-6.x/modules/system/system.install
Migrate the menu items from the old menu system to the new menu_links table.
system_update_6022 in drupal-6.x/modules/system/system.install
Update files tables to associate files to a uid by default instead of a nid. Rename file_revisions to upload since it should only be used by the upload module used by upload to link files to nodes.
system_update_6024 in drupal-6.x/modules/system/system.install
Add translation fields to nodes used by translation module.
system_update_6027 in drupal-6.x/modules/system/system.install
Add block cache.
system_update_6036 in drupal-6.x/modules/system/system.install
Change the search schema and indexing.
system_update_6040 in drupal-6.x/modules/system/system.install
Add a weight column to the upload table.
system_update_6051 in drupal-6.x/modules/system/system.install
Create a signature_format column.
update_fix_d6_requirements in drupal-6.x/update.php
Perform Drupal 5.x to 6.x updates that are required for update.php to function properly.