JPA / Hibernate DDL生成; CHAR与VARCHAR

I have a JPA/Hibernate data model that I am using the Hibernate hbm2ddl tool to generate database DDL. I have some strings that should be CHAR and some that may be VARCHAR in the database. I want to minimize hand editing of the DDL (I realize that some will have to happen).I have a JPA/Hibernate data model that I am usi