Part of the SQLite test cases are open source (the logic tests), but indeed unfortunately the biggest part are not. You can purchase a license for these tests t

Part of the SQLite test cases are open source (the logic tests), but indeed unfortunately the biggest part are not. You can purchase a license for these tests though, so saying nobody has seen them is likely incorrect. Either way, the fact that it is DO-178B certified for use on aircraft should tell you something about the reliability of it. It is certainly more reliable than most other software, OSS or otherwise. I am curious what practical problems you encountered with SQLite. Could you perhaps expand on that?