How to get the default transaction isolation level using Hibernate API

Hibernate ORM
1

Can I get default transaction isolation level using Hibernate’s API?

2

When using Hibernate API:

int isolationLevel = session.doReturningWork(Connection::getTransactionIsolation);

When using JPA:

int isolationLevel = entityManager.unwrap(Session.class)
	.doReturningWork(Connection::getTransactionIsolation);
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3

If I don’t set hibernate isolation level through the property then what is the default isolation level used by hibernate?

4

Hibernate uses the underlying DB isolation level.

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5

Can I override the underlying database isolation level through hibernate? If yes then how?

6

It all depends on what connection provider you use. For DataSource ConnectionPprovider, set it at Connection Pool level. For other Connection Providers, just set the hibernate.connection.isolation property.

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