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Offer flag to consider id generator with local scope (legacy non JPA behavior)

Description

The Id generator scope has changed from local scoped (or qualified by entity name, I can't remember) to global scope in strict adherence to the JPA (new TCK test).
http://in.relation.to/2018/02/07/hibernate-orm-5213-final-release/

This is creating migration trouble on large applications. https://twitter.com/aczar0/status/981084503702736896

Consider adding a legacy flag that can be easily set by a user so he can migrate at his/her own pace.

Environment

None

Status

Assignee

Andrea Boriero

Reporter

Emmanuel Bernard

Fix versions

Labels

None

backPortable

None

Suitable for new contributors

None

Requires Release Note

None

Pull Request

None

backportDecision

None

Affects versions

5.2.13

Priority

Major