24.2.82. @Synchronize
The @Synchronize annotation is usually used in conjunction with the @Subselect annotation to specify the list of database tables used by the @Subselect SQL query.
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With this information in place, Hibernate will properly trigger an entity flush whenever a query targeting the @Subselect entity is to be executed while the Persistence Context has scheduled some insert/update/delete actions against the database tables used by the @Subselect SQL query.
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Therefore, the @Synchronize annotation prevents the derived entity from returning stale data when executing entity queries against the @Subselect entity.
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