Answer by Shamina for Why is CaseFeed.CreatedById Polymorphic?
Looks like before Spring 12, CreatedBy field, on some objects, could be linked with User or SelfServiceUser object.Refer to screenshot below obtained from a 2010 blog post (link to blog is no longer...
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A polymorphic lookup is, by definition, one where the SObjectType of the parent be multiple different values. That was the basis for how I compiled Polymorphic keys - definitive list?However, a...
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