JPA query with left join and "not exists" - jpa

Question

I am writing a JPA query using TopLink which involves the following three entities.
#Entity
#Table(name = "OFFERS")
public class Offers implements Serializable {
#Id
#GeneratedValue(strategy=GenerationType.AUTO, generator="offers_seq_gen")
#SequenceGenerator(name="offers_seq_gen", sequenceName="OFFERS_SEQ")
#Basic(optional = false)
#Column(name = "OFFERID")
private Long offerid;
#OneToMany(cascade = CascadeType.ALL, mappedBy = "offers", fetch = FetchType.LAZY)
private List<Coupons> couponsList;
}
#Entity
#Table(name = "COUPONS")
public class Coupons implements Serializable {
#Id
#GeneratedValue(strategy=GenerationType.AUTO, generator="coupons_seq_gen")
#SequenceGenerator(name="coupons_seq_gen", sequenceName="COUPONS_SEQ")
#Basic(optional = false)
#Column(name = "COUPONID")
private Long couponid;
#Basic(optional = false)
#Column(name = "ISSUED", columnDefinition="TIMESTAMP DEFAULT CURRENT_TIMESTAMP")
#Temporal(TemporalType.TIMESTAMP)
private Date issued;
#JoinColumn(name = "USERID", referencedColumnName = "USERID")
#ManyToOne(optional = false, fetch = FetchType.LAZY)
private Users users;
#JoinColumn(name = "OFFERID", referencedColumnName = "OFFERID")
#ManyToOne(optional = false, fetch = FetchType.LAZY)
private Offers offers;
#Entity
#Table(name = "USERS")
public class Users implements Serializable {
#Id
#GeneratedValue(strategy=GenerationType.AUTO, generator="users_seq_gen")
#SequenceGenerator(name="users_seq_gen", sequenceName="USERS_SEQ")
#Basic(optional = false)
#Column(name = "USERID")
private Long userid;
#OneToMany(cascade = CascadeType.ALL, mappedBy = "users", fetch = FetchType.LAZY)
private List<Coupons> couponsList;
I need to find all the Offers who either have no coupons for a given user or all the coupons for the user were issued more than a day ago.
I have tried many different approaches and the only query I have come up with so far, which does not crash the server on deployment is:
SELECT o
FROM Offers o
LEFT JOIN o.couponsList c
WHERE
c.users.userid = :userid AND c.issued < :yesterday
OR
NOT EXISTS
(SELECT c1
FROM Coupons c1
WHERE c1.offers = o AND c1.users.userid = :userid)
But it does not return the Offer when the Coupons entry does not exist.

Answer 1

I managed to find a working query. Leaving it here for reference if anyone had similar issues:
SELECT o FROM Offers o WHERE
NOT EXISTS
(SELECT c FROM Coupons c WHERE c.users.userid = :userid
AND c.issued > :yesterday AND c.offers = o)
OR NOT EXISTS
(SELECT c1 FROM Coupons c1 WHERE c1.offers = o
AND c1.users.userid = :userid)