comment_uninstall in core/modules/comment/comment.install
Implements hook_uninstall().
locale_update_1000 in core/modules/locale/locale.install
Drop textgroup support.
redirect_update_1004 in core/modules/redirect/redirect.install
Fix redirect table schema of upgraded sites.
SchemaTestCase::assertFieldAdditionRemoval in core/modules/simpletest/tests/schema.test
Assert that a given field can be added and removed from a table.
SchemaTestCase::assertFieldCharacteristics in core/modules/simpletest/tests/schema.test
Assert that a newly added field has the correct characteristics.
system_update_1027 in core/modules/system/system.install
Remove the per-user cache column from the session table.
taxonomy_update_1002 in core/modules/taxonomy/taxonomy.install
Drop the old taxonomy vocabulary table.
update_prepare_language in core/includes/update.inc
Prepare Backdrop language changes for the bootstrap if needed.
user_update_1002 in core/modules/user/user.install
Remove the ability for users to select a theme.
user_update_1007 in core/modules/user/user.install
Convert user roles to configuration files.
views_update_1006 in core/modules/views/views.install
Remove headers field from cache tables.