Danilov Roman ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=70121%3... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiYzc5YmFhNTQz... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16155?atlOrigin=eyJpIjoiYzc5Ym... ) HHH-16155 ( https://hibernate.atlassian.net/browse/HHH-16155?atlOrigin=eyJpIjoiYzc5Ym... ) Problem with @Generated and jdbc.batch_size ( https://hibernate.atlassian.net/browse/HHH-16155?atlOrigin=eyJpIjoiYzc5Ym... ) Issue Type: Bug Affects Versions: 6.1.6, 6.1.7 Assignee: Unassigned Attachments: hibernate-orm-6.zip Components: hibernate-core Created: 09/Feb/2023 03:58 AM Priority: Major Reporter: Danilov Roman ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=70121%3... ) After updating hibernate version from 5.6.12 to 6.1.6, a problem appeared. If Entity has field with annotation @Generated () and hibernate’s properties have parameter jdbc.batch_size > 0 then when new object of entity is saved to the database, an error appears in the logs and the saving does not occur. The error occurs in the class org.hibernate.metamodel.mapping.internal.GeneratedValuesProcessor. And the problem is that when in entity there is an annotation @Generated over the field, then in hibernate, first, it is saved in the database, and then these generated fields are received from the database. And apparently, when there is jdbc.batch_size > 0 setting, then INSERT to the database does not occur immediately, and SELECT tries to find a line in the database that is not there yet. With the old version of hibernate 5.6.12 everything worked without errors. Link to https://discourse.hibernate.org/t/problem-with-generated-and-jdbc-batch-s... ( https://discourse.hibernate.org/t/problem-with-generated-and-jdbc-batch-s... ) with more info. And i have attached test cases. ( https://hibernate.atlassian.net/browse/HHH-16155#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16155#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100215- sha1:a0f3b6a )