JPA left join not working?

Question

I have two entities Outlet and Report.They are not connected in Entity class. I want Reports even when outlet id is not present. Following is the query I am writing but its behaving like inner join.

@Query("Select rep,out.area.area_name from Report rep left join Outlet out on out.id=rep.outletId where rep.cDate in :dates")
List<Object[]> getReportsByMethodAndFormulaAndTimePeriods(@Param("dates") List<LocalDate> dates);

Any ideas?

Answer 1

It is not SQL so join happens by entities fields. The query should be like this

@Query("Select rep,out.area.area_name from Report rep left join rep.outlet out where rep.cDate in :dates")

I assume the Report entity has a nullable field Outlet outlet.

Also in your case the out.area.area_name could fail if there is no related outlet