Despite documentation (http://docs.jboss.org/hibernate/orm/5.0/userguide/html_single/Hibernate_User_Guide.html#configurations-hbmddl) saying 'create-only' is a valid value for the hibernate.hbm2ddl.auto property, it is not recognized.
Test case in this repo: https://github.com/ahumellihuk/hibernate-test-case-templates
Do you have some clear evidence or even better a test case?
You can find our test case template here: https://github.com/hibernate/hibernate-test-case-templates/tree/master/orm/hibernate-orm-5 .
You will have to downgrade ORM in the template.
I've forked the test case template repo and changed a single property value - when I run 'mvn verify' the tests run successfully, but you get a warning message: "WARN SessionFactoryOptionsBuilder:394 - Unrecognized hbm2ddl_auto value : create-only. Supported values include 'create', 'create-drop', 'update', 'none' and 'validate'. Ignoring". Please find the forked repo here: https://github.com/ahumellihuk/hibernate-test-case-templates
Yeah, it seems you're right. The class is not in sync with this other one https://github.com/hibernate/hibernate-orm/blob/master/hibernate-core/src/main/java/org/hibernate/tool/schema/Action.java#L17 which is the one really doing the work.
The SchemaAutoTooling class is just here to provide some values to some deprecated Settings class.
Adding this one to the 5.4.0 planning.