HQL implicit join in where clause generate cross join instead of inner join

Question

I\'m using Hibernate 3.6 and MSSQL 2012.

When executing this HQL

select tbl.state from Property tbl where tbl.state = 1 and tbl.entity.state = 1 and
         


        

Answer 1

Your join is an inner join, but using the old syntax consisting in adding a condition in the where clause:

where property0_.refEntityid=entity1_.id

instead of doing it with

inner join Entities entity1_ on property0_.refEntityid=entity1_.id

The result is exactly the same.

And using implicit joins in HQL is not a problem at all, as long as you understand what they're doing.

Answer 2

When using HQL, always use proper aliases when performing join operations.Your query should be something like that:

select tbl.state 
from Property tbl 
left join tbl.entity entity 
where tbl.state = 1 
    and entity.state = 1 
    and entity.className = 'com....' 
    and tbl.fieldName = 'fieldName'

Otherwise if you try to use tbl.entity.someProperty, in HQL, it will always create a crossJoin