Lets have disabled FK then.

postgre, seems to not have it, but the proposal could include also "disabled FK" part.

teradata, oracle, sql server already have option for FK "disable/no check".

https://docs.teradata.com/r/eWpPpcMoLGQcZEoyt5AjEg/df1PvVh6e... https://docs.microsoft.com/en-us/sql/relational-databases/ta... https://docs.oracle.com/cd/B28359_01/server.111/b28310/gener...