pub const UPDATE_ITEM: &str = "\
UPDATE items SET flags = :flags, object_hash = :object_hash, meta = :meta, sort_key = :sort_key, \
level = :level, deleted = :deleted, conflicted = :conflicted, conflict_object = :conflict_object \
WHERE collection = :collection AND link_id = :link_id";Expand description
Updates one existing item’s columns in place (the diffed-save path; the
primary key (collection, link_id) is unchanged).