Annotation Type Lob
Marks a String, char[] or byte[] field as a large object, as JPA's
@Lob does.
It changes nothing about the column, because every string and byte column
is already one: MySQL gets LONGTEXT and LONGBLOB, and SQLite and
PostgreSQL leave TEXT and BLOB/BYTEA unbounded. It exists so an entity
ported from JPA keeps the annotation, and the build rejects it on a field of
any other type, as JPA would.