There are some objects (like FieldDefinition or AppTabMember) that when you want to uses SOSL SELECT all data from them, it fails with "a filter on a reified column is required". I have a lot of questions about these objects, especially:
Is there a way to extract all the values from these kind of objects?
Can a custom object be created with reified columns? (Are those columns declared as external reference IDs or something else?)