jpql

This piece of code irritates me, sometimes it working and some other times it doesn't ! The NamedQuery : (name = "User.findByLogin", query = "SELECT u FROM User u WHERE u.login = :login") public User findByLogin(String login) { Query query = em.createNamedQuery("User.findByLogin"); query.setParameter("login", login); try { return (User) query.getSingleResult(); } catch (javax.persistence.NoResultException ex) { return null; } } The error make me crazy ! Avertissement: EJB5184: A system exception occurred during an invocation on EJB UserFacade , method: public dz.admin.entity.User dz.admin

I got this list of coins that i want to filter with that 3 optional parameters(Currency, quantity and year) How can I set parameters in JPQL as optional? I dont want to do 9 "if else" for checking if its null I got the function filtradoMonedas (filterCoins) that filter the object Moneda(coin) using that 3 OPTIONAL parameters but its not working if there´s a null parameter. This just work well if dont set empty parameters, if cantidad or ano is "" returns exception of bad query. Just want it as an optional. Heres the method: public List<Moneda> filtradoMonedas(Divisa divisa, BigDecimal cantidad

I'm trying to make a query using Spring Data, but I cannot make it work: @Query(SELECT t FROM Thing t WHERE name LIKE :name AND CASE WHEN (:minVal <= 0) THEN TRUE ELSE (val <= :minVal) END AND CASE WHEN (:maxVal <= 0) THEN TRUE ELSE (val >= :maxVal) END) Page<Thing> getThings(@Param("name") String name, @Param("maxVal") int maxVal, @Param("minVal") minVal); StackTrace: Caused by: java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected AST node: CASE near line 1, column 49 [SELECT t FROM Thing t WHERE name LIKE :name AND CASE WHEN (:minVal <= 0) THEN

I've seen that DBMS like MySQL supports query containing regular expressions. Does Eclipselink support this? I have to retrieve entities having some String attribute matching some regular expression as SELECT X FROM Person X WHERE X.name <some keyword> (A-Z)* MySQL uses REGEX or RLIKE for regular expression queries. JPQL does not support these operators, so you can use a native SQL query. In EclipseLink you could define your own ExpressionOperator for these, and use it in an Expression query, but not currently with JPQL. JPQL does support calling database functions using FUNC, but these have

I'm trying to get some values from a H2 db table. The query which does what I need is this: SELECT cast(creationDate as date) as DATE, SUM(paymentValue) as TOTAL,fxRate FROM payment group by DATE where "creationDate", "paymentValue", "fxRate" are columns of the table "payment". CreationDate is a timestamp so I have to get only the date from it. When I try to write it in Java @Query("SELECT cast(creationDate as date) as daydate , SUM(paymentValue) as value1, fxRate as value2 FROM payment " + "group by cast(creationDate as date)") List<Payment> findPaymentValuePerDay (); I get the error [Ljava