also, is there a way to load a custom duckdb extension in the duckling? I am customizing the substrait extension [1] but I get the feeling I won't be able to load it using motherduck?
[1]: https://github.com/duckdb/substrait/
I'm trying to figure out where that occurs (I suspect in the join order optimizer around query graph manager). I'm also wondering if I have an extension that translates to duckdb::LogicalOperator (which the optimizer accepts) then motherduck can still do hybrid execution downstream (since it sounds like it is an optimization rule)
partially a question about motherduck, and partially about duckdb: does hybrid execution interpose in the translation from LogicalOperator to PhysicalOperator (or Relation)?