Hibernate default joining for nullable many-to-one

Question

I have a hibernate mapping like this in a ProductDfn class

@ManyToOne( fetch = FetchType.LAZY, optional = true )
@JoinColumn( name = \"productTypeFk\", nulla         


        

Answer 1

An inner join is used because you've explicitly listed p.productType.name in your select clause. This wouldn't have happened were you just to select ProductDfn since your fetch is set to LAZY.

If you only need to retrieve those two properties you'll have to explicitly specify an outer join in your query:

select p.name as col1, ptype.name as col2
  from ProductDfn p
  left join fetch p.productType ptype