comment_update_1000 in modules/comment/comment.install
Renames {comment}.language to {comment}.langcode.
file_update_1003 in modules/file/file.install
Add a type column to the file_managed table, and add a file_metadata table.
locale_update_1005 in modules/locale/locale.install
Convert source and translation from blob to text.
node_update_1014 in modules/node/node.install
Change {history}.nid to an unsigned int in order to match {node}.nid.
redirect_update_1001 in modules/redirect/redirect.install
Rename the language column to langcode.
taxonomy_update_1002 in modules/taxonomy/taxonomy.install
Drop the old taxonomy vocabulary table.
update_prepare_bootstrap in includes/
Performs extra steps required to bootstrap when using a Drupal 7 database.
user_update_1007 in modules/user/user.install
Convert user roles to configuration files.