The error occurred due to an explicit constraint, this will happen when attempting to add two contacts with the same UID.
A contact was not found by UID (this is different from a query that returns no results, which is not an error).
An attempt was made to fetch results past the end of a contact list
An error was reported from the SQLite engine
A query was invalid. This can happen if the search expression could not be parsed or if a phone number query contained non-phonenumber input.
An error occured while loading or creating the database
An unsupported #EContactField was specified in the summary
A query was not supported
Defines the types of possible errors reported by the #EBookSqlite