#Update multiple rows in hibernate java update

In general, you should try to avoid using an ON DUPLICATE KEY UPDATE clause on tables with. Scenario 1 and 3 are roughly equivalent, but there are some situations where you'd want to use Scenario 2. If a1 OR b2 matches several rows, only one row is updated. tran ends and the row for someField is updated (you made the changes *after* merging) tran ends but the row for someField is not updated in the database tran ends, and the row for someField is updated in the database

Though you can use the returned instance (managed one). The instance you pass in will not be managed (any changes you make will not be part of the transaction - unless you call merge again). HSQL Update With Parameters : Update Hibernate Java Tutorial import import public. In any case, it will copy the state from the supplied entity, and return managed copy. It does return something what exists in PersistenceContext or creates a new instance of your entity. Merge returns the managed instance that the state was merged to. Persist takes an entity instance, adds it to the context and makes that instance managed (ie future updates to the entity will be tracked). Since i already have a refer to the other table, however this generates an invalid query throwing a sql grammar exception… is there any other way to achieve this?Įither way will add an entity to a PersistenceContext, the difference is in what you do with the entity afterwards. + 'where a.site.id=:siteId and a.agentTree like :agentTree')}) + 'set a.accountStatus=:accountStatus, a.player.status=:playerStatus ' However this throws a: .QuerySynta圎xception: expecting 'set', found 'INNER'Īnother option which i tried is: .Agent a ' + 'WHERE a.site.id=:siteId and a.agentTree like :agentTree')}) + 'SET a.accountStatus=:accountStatus, p.status=:accountStatus ' However how will the update be implemented if i need to batch update multiple tables as well?

List stlistHibernateUtil.getSession ().createQuery ('from student').list () and you will get all records from Student table.

On one of the questions posted here updating multiple rows using JPA, the second option which uses a namedQuery to update seems to be faster. HQL Query - you are using hibernate that means you have done mapping to Student table and Student class. This approach also enables me to update other tables (as other property pf MyEntity). get list and assign columns to be updated

neither lost updates nor dirty reads implements read committed isolation. I need to update multiple rows in Table a and it seems ok to use the object oriented approach by using a for loop and doing a merge. One transaction may not write to a row if another uncommitted transaction has.

Update multiple rows in hibernate java