[Hibernate] questions about query of join

Query: 1. from invItem c where c.regularDoc is null; ---no rows return, should be a large number of rows 2. from invItem c where c.regularDoc is not null; --- returned the correct rows, cast (InvDecalItem) to get the rows. 3. from invItem c left join c.regularDoc doc where doc is null; --- returne

Re: [Hibernate] confirm 9450b97270917ddaf59faa6fb2a16df9d93669e3

Query: 1. from invItem c where c.regularDoc is null; ---no rows return, should be a large number of rows 2. from invItem c where c.regularDoc is not null; --- returned the correct rows, cast (InvDecalItem) to get the rows. 3. from invItem c left join c.regularDoc doc where doc is null; --- returne