i found this feature by accident while comparing performance of duckdb and clickhouse for materializing from an sqlite file, duckdb was instant vs clickhouse taking seconds to stream the data from sqlite. then i found out duckdb actually uses sqlite directly including the indices that were stored. once the table was in a clickhouse table, clickhouse was twice as fast without an index than duckdb or sqlite with index but the initial load from sqlite took way longer. for one shot things like in a dbt pipeline duckdb might make more sense if all input formats are supported.