update_check_incompatibility($name, $type = 'module') Tests the compatibility of a module or theme.
update_check_requirements() Checks update requirements and reports errors and (optionally) warnings.
Drupal database update API. This file contains functions to perform database updates for a Drupal installation. It is included and used extensively
update_build_dependency_graph($update_functions) Constructs a graph which encodes the dependencies between
update_already_performed($module, $number) Determines if a module update has already been performed.
update_replace_permissions($replace) Replace permissions during update. This
update_retrieve_dependencies() Invokes
update_fix_compatibility() Disables any extensions that are incompatible with the current core version.
update_resolve_dependencies($starting_updates) Resolves dependencies in a set of module updates, and orders
update_set_schema($module, $schema_version) Forces a module to a given schema version. This
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