![]() In this hibernate tutorial, we learned to insert an object into the database using Session, EntityManager and HQL queries. "insert EmployeeEntity (employeeId, firstName, lastName, email) " + Note that the INSERT statement must be executed by calling Query#executeUpdate(). This inserts many new rows or none at all.įor example, we can use the given statement to insert a EmployeeEntity record. insert … select, where the inserted attribute values are sourced from a subquery. ![]() This inserts a single row in the database, or multiple rows if we provide multiple tuples in the values clause. insert … values, where the attribute values to insert are given directly as tuples.Hibernate Query Language (HQL) supports two kinds of insert statement: EntityManagerFactory emf = Persistence.createEntityManagerFactory("H2DB") ĮntityManager em = emf.createEntityManager() ĮmployeeEntity emp = new configure the datasource, we need to supply the META-INF/persistence.xml in the application classpath that will have all the configuration details. Hibernate (version 6 onwards) internally implements Jakarta persistence so we can use this method directly. The Jakarta persistence API provides method to fetch or persist an entity using its EntityManager interface. We must configure the SessionFactory using the XML configuration or Java configuration as per requirements. EmployeeEntity emp = new id1 = (Long) session.save(emp) It results in a duplicate record in the database upon committing or flushing. Join For Free This article provides a quick overview of all Hibernate mapping annotations. The save() call on a detached instance creates a new persistent instance and creates a new primary key. 66.63K Views Join the DZone community and get the full member experience. But it behaves differently for detached entities. Session session = sessionFactory.openSession() ĮmployeeEntity emp = new has another method save() that works similar to persist(). Its persist() method will save the entity into the database. The Session interface provides many methods to perform CRUD operations on an Entity. Using Session#persist() and Session#save() It can have more fields, but I am taking only four to make the example concrete. Getters and setters are hidden for brevity Public class EmployeeEntity implements Serializable = GenerationType.IDENTITY) We have an Employee object in the application that we want to store in the database. In this hibernate tutorial, we will learn to insert data in the database using various techniques available through hibernate and Jakarta persistence API.
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