Comment by quotemstr

FWIW (and this is IMHO of course) DuckDB makes working with random JSON much nicer than SQLite, not least because I can extract JSON fields to dense columnar representations and do it in a deterministic, repeatable way.

The only thing I want out of DuckDB core at this point is support for overriding the columnar storage representation for certain structs. Right now, DuckDB decomposes structs into fields and stores each field in a column. I'd like to be able to say "no, please, pre-materialize this tuple subset and store this struct in an internal BLOB or something".