Fields of type Text, Single-, and Multi-Select are not indexed.
This can lead to some very awkward results, such as having a Contacts DB with Text fields for First Name, Last Name, and Address, none of which are indexed or searchable.
In the case of Single- and Multi-Select fields, it would also be useful if their current values were indexed, so that, e.g., if a particular entity has a “Type” Single-Select field that is currently set to “Vendor”, if I search for Vendor, all such that entities would appear.
Ideally we would be able to choose which fields get indexed in each DB, since there will clearly be cases where we do NOT want every single field indexed.