pls, can someone help on how to solve this error?

Question

if have a dao

@Dao
interface LetterDao {
    @Query("SELECT * FROM `letter.db`")
    fun getLetters(query: SupportSQLiteQuery): DataSource.Factory<Int, Letter>
...
}

error:

Query method parameters should either be a type that can be converted into a database column or a List / Array that contains such type. You can consider adding a Type Adapter for this.