Hibernate why flush

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Join For Free. Not all queries trigger a Session flush Many would assume that Hibernate always flushes the Session before any executing query. Whenever we want to make use of some specific querying techniques, such as: Window functions Pivot table Common Table Expressions we have no other option, but to run native SQL queries. For this we define the following unrelated entities: The test will execute the following actions: A Person is going to be persisted.

Selecting User s should not trigger a the flush. AbstractSaveEventListener - Generated identifier: f76f61e2-f3eeafeceed0, using strategy: org. Except when you explicity flush , there are absolutely no guarantees about when the Session executes the JDBC calls, only the order in which they are executed. However, Hibernate does guarantee that the Query.

It is possible to change the default behavior so that flush occurs less frequently. The FlushMode class defines three different modes: only flush at commit time and only when the Hibernate Transaction API is used , flush automatically using the explained routine, or never flush unless flush is called explicitly.

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