How to perform left join in Hibernate Query Language?

Question

This is my HQL query, but it isn\'t working and is throwing an error.

Hql query:

SELECT 
    *
FROM 
    TABLEA A 
LEFT JOIN 
    A.TABLEB B 
WHERE 
         


        

Answer 1

In HQL you can use LEFT JOIN only with linked property in main entity:

Sample

EntityA has an object entityB of type EntityB so you can

SELECT A FROM EntityA A LEFT JOIN A.entityB B WHERE ...

IF EntityA haven't entityB property but is EntityB have a property entityA, you can't write this:

SELECT A FROM EntityA LEFT JOIN EntityB B WHERE B.entityA = A 

because you have an error. This is an Hibernate issue not resolved yet.