text: --[beginscript]
  
  -- This is an enormous breaking change... Except that every known use of this package
  -- de facto consider the EMail to be unique (ie. an EMail cannot be shared among users).
  -- This version sets this to be the default.
  alter table CK.tActorEMail add constraint UK_CK_tActorEMail_EMail unique nonclustered (EMail);
  
  --[endscript]
  