Top "Eclipselink" questions

No operator matches the given name and argument type(s). You might need to add explicit type casts. -- Netbeans, Postgresql 8.4 and Glassfish

I am trying to edit a table in Postgresql using JPA in Glassfish using EclipseLink. When I insert an entity, …

java postgresql orm jpa eclipselink

Please explain about insertable=false and updatable=false in reference to the JPA @Column annotation

If a field is annotated insertable=false, updatable=false, doesn't it mean that you cannot insert value nor change the …

java jpa jakarta-ee eclipselink

Parameter in like clause JPQL

I am trying to write a JPQL query with a like clause: LIKE '%:code%' I would like to …

java jpa eclipselink jpql sql-like

JPA: JOIN in JPQL

I thought I know how to use JOIN in JPQL but apparently not. Can anyone help me? select b.fname, …

java jpa eclipselink jpql

Why do I need to configure the SQL dialect of a data source?

When we configure a data source using Hibernate, we should add the hibernate.dialect property (or eclipselink.target-database if you …

hibernate configuration eclipselink persistence.xml dialect

What is referencedColumnName used for in JPA?

In JPA there is an attribute called referencedColumnName that can be set on @JoinColumn, @PrimaryKeyJoinColumn what is the idea behind …

hibernate jpa orm eclipselink openjpa

Batch inserts using JPA EntityManager

Is there a way where we can use batch inserts using JPA EntityManager. I know there is no direct way …

java jakarta-ee ejb-3.0 eclipselink

The JPA hashCode() / equals() dilemma

There have been some discussions here about JPA entities and which hashCode()/equals() implementation should be used for JPA entity …

java hibernate jpa identity eclipselink

Entitymanager.flush() VS EntityManager.getTransaction().commit - What should I prefer?

What should I prefer when updating the database? What are the pros & cons with either method and when shall …

java jpa eclipselink

Disable caching in JPA (eclipselink)

I want to use JPA (eclipselink) to get data from my database. The database is changed by a number of …

java jpa entity eclipselink