         
         let whereClause = whereClauses.joined(separator: " OR ")
         let sql = "DELETE FROM \(databaseTableName.quotedDatabaseIdentifier) WHERE \(whereClause)"
-        let statement = try! db.makeUpdateStatement(sql)
+        let statement = try db.makeUpdateStatement(sql)
         statement.arguments = StatementArguments(arguments)
         return statement
     }

        
        let whereClause = whereClauses.joined(separator: " OR ")
        let sql = "SELECT \(defaultSelection) FROM \(databaseTableName.quotedDatabaseIdentifier) WHERE \(whereClause)"
        let statement = try! db.makeSelectStatement(sql)
        statement.arguments = StatementArguments(arguments)
        return statement
    }

    ///     - keys: A sequence of primary keys.
    /// - returns: The number of deleted rows
    @discardableResult public static func deleteAll<Sequence: Swift.Sequence>(_ db: Database, keys: Sequence) throws -> Int where Sequence.Iterator.Element: DatabaseValueConvertible {
        guard let statement = try makeDeleteByPrimaryKeyStatement(db, keys: keys) else {
            return 0
        }
        try statement.execute()
