Baptiste Rivalin ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=70121%3... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiMWNiMDQ0ODli... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16762?atlOrigin=eyJpIjoiMWNiMD... ) HHH-16762 ( https://hibernate.atlassian.net/browse/HHH-16762?atlOrigin=eyJpIjoiMWNiMD... ) SchemaMigrator generates ORA-22859 errors on columns annotated with @Lob ( https://hibernate.atlassian.net/browse/HHH-16762?atlOrigin=eyJpIjoiMWNiMD... ) Issue Type: Bug Affects Versions: 6.2.0, 6.2.4 Assignee: Unassigned Components: hibernate-core Created: 07/Jun/2023 02:18 AM Environment: Oracle 19c Priority: Major Reporter: Baptiste Rivalin ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=70121%3... ) Hello, Using Hibernate in Update mode generates “alter table” on columns of type blob/clob which seems to be forbidden in Oracle. Each time the alter table command is sent on these columns, Oracle responds with an error of type ORA-22859. From the test case I made, the corresponding exception looks like this : My test case is available at : https://github.com/brivalin/hibernate-test-case-templates To reproduce the problem you have to : * Modify the persistence.xml to point to your own Oracle database * Run it once to generate the schema * Run it a second time to throw the ORA-22859 error The original Discussion is available here : https://discourse.hibernate.org/t/schemamigrator-wants-to-alter-my-column... ( https://hibernate.atlassian.net/browse/HHH-16762#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16762#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#100225- sha1:62413c2 )