Almost(!) every single query engine has bugs like this. The fact is that DuckDB is version 0.9.1 (pre 1.0) so bugs are kind of expected. I have found bugs like

Almost(!) every single query engine has bugs like this. The fact is that DuckDB is version 0.9.1 (pre 1.0) so bugs are kind of expected. I have found bugs like this in commercial engines.