Hi Yun At first glance, the proposal looks reasonable to me. It seems that a large part of the "logic" is on the client side, interpreting the storage-credentials properties. That's OK for me because that's the purpose of Generic Table: a kind of "storage" for other table formats (non Iceberg) where the clients have to "interpret".
However, I'm a bit confused: the purpose of Generic Table is to support non Iceberg table formats (as stated earlier). If we "couple" the Generic Table with Iceberg, it looks anti-pattern and not aligned with the purpose of Generic Table. I think it would be very confusing for Generic Table "integrators" and "users" and create "dependencies" to Iceberg (if I want to use Delta or Hudi, I don't want to use Iceberg). I would rather prefer to have something in the Generic Table "clients", not coupled in any way with Iceberg. We can totally mimic the Iceberg logic in Generic Table, but not "use" it. I will take a deeper look at the proposal. Regards JB On Fri, Feb 6, 2026 at 7:29 PM yun zou <[email protected]> wrote: > Hi All, > > Generic Tables have been available since Polaris 1.0.0 and have seen > growing interest from an increasing number of customers. > > However, the current Generic Table capability has some limitations. One > key gap is the lack of credential vending support. Without credential > vending, query engines must access tables using long-lived, static cloud > credentials configured directly in the engine runtime, which limits both > usability and security. > > To address this, we propose adding credential vending support for Generic > Tables. This enhancement would allow a Polaris catalog to dynamically vend > short-lived, scoped storage credentials to query engines at runtime when > accessing Generic Tables. > > The goals of this proposal are to: > > 1. > > Enable credential vending support for Generic Tables in Polaris > 2. > > Deliver an end-to-end experience for currently supported table > formats, including Delta, Hudi, and Lance > 3. > > Maintain consistency with the existing Iceberg credential vending model > > Please find the attached short design document with additional details. We > would appreciate your review and valuable feedback. > > link to google doc: > https://docs.google.com/document/d/1QzTx4tcS23_mF-gc77GbTqtwuRHY5f_Aa_6E4VSKFU4/edit?tab=t.0#heading=h.rpqtaz73xt4v > > Best Regards, > > Yun >
