Problems with EJB-QL - not empty, OR

[carstenrudat]

Hi all,

I tried to find some entities where a relation (relation) is null or a specific attibute of a related entity is x:

SELECT o FROM MyObject o WHERE (o.relation is empty) OR ((o.relation is not empty) AND (o.relation.attribute LIKE 'x'))

But this doesn't work. Debug enabled, I see the SQL-Statement (MySQL) and I guess the paranthesis are wrong:

select ... where ... not (exists (select ...)) or (exists (select ...)) and (...attribute like 'x'))

I need paranthesis around the last two blocks, but I realy don't know how?!


Any help, thank you!

Carsten

[carstenrudat]

For everyone with the same problem (and the same less expirience as me ;-)):

Selecting all entities and then using

member of

worked for me.


Carsten