Creating a unique contraint on a column through hibernate mapping

Mapping:

 

<class …>

…

  <natural-id>

    <property

      name="name"

      column="name"

      type="string" />

  </natural-id>

…

</class>

 

Table Structure (in PostgreSQL):

 

CREATE TABLE xyz

(

  id bigint NOT NULL,

  "name" character varying(255) NOT NULL,

  CONSTRAINT xyz_pkey PRIMARY KEY (id),

  CONSTRAINT xyz_name_ukey UNIQUE (name)

)