Hi,
I am new to hibernate, and I wish to get clarification regarding the Flushing operations in hibernate.
for eg If i tried to update a table in an extended session,

Will hibernate flush some of the changes to the database in the middle of transaction?(before completing the transaction)

If this is the case, when the data(data that has got flushed by hibernate) will be committed to the database ?
whether at the time of committing the transaction or at the time when hibernate flushing the data to DB itself.

Clarify me please.

Please find the hibernate properties that i am using in cfg.xml

transaction.manager_lookup_class = org.hibernate.transaction.WebSphereExtendedJTATransactionLookup
hibernate.transaction.factory_class=org.hibernate.transaction.JTATransactionFactory
hibernate.transaction.flush_before_completion=true
hibernate.transaction.auto_close_session=true


Thanks in advance.

Hi

Hiberante can flush changes to database in following conditions.

1) Sometimes before execution of query.
2) When tranaction is commited.
3) When flush on session is called.
depending upon your flush mode selection.

If you do not want your data to be synchronized by hibernate before query execution
need the appropriate flush mode based on your requirement.

Thanks Prateek,

One more questions, if I set the transaction.flush_before_completion property to true, the data will be flushed at the time of transaction commit.

am I correct ?

Hi

According to the docs.

hibernate.transaction.flush_before_completion = true
If enabled, the session will be automatically flushed during the before completion phase of the transaction. Built-in and automatic session context management is preferred.