public void addMetadata() {
        addMetadata(firstName, ColumnMetadata.named("firstName").withIndex(2).ofType(12).withSize(255));
        addMetadata(id, ColumnMetadata.named("id").withIndex(1).ofType(-5).withSize(19).notNull());
        addMetadata(lastName, ColumnMetadata.named("lastName").withIndex(3).ofType(12).withSize(255));
        addMetadata(nickName, ColumnMetadata.named("nickName").withIndex(4).ofType(12).withSize(255));
    }
SName is a Querydsl query type for SName
querydsl-jpa/src/test/java/com/querydsl/jpa/domain/sql/SName.java