Thank you, Jan. I've approved the PR. It's great to see the spec reaching this level of alignment.
And +1 to thanking everyone who participated in the community discussions and helped move the spec forward: Benny, Steven, Marius, Dan, Talat, Nevin, and Manish. Thanks, Walaa. On Tue, Nov 10, 2026 at 8:26 AM Jan Kaul via dev <[email protected]> wrote: > Hi everyone, > > The materialized view working group has a draft of the materialized view > spec that is ready for broader review, and we'd like to invite feedback > from the community. > > The draft is in this PR: https://github.com/apache/iceberg/pull/11041 > > In short, the spec defines: > > - Materialized view metadata: a materialized view is an Iceberg view > whose version references a storage table. Readers unaware of > materialized views ignore the reference and evaluate the view query > directly. > - Refresh state: stored in the storage table's snapshot summary. It > records the view version and refresh start time used for the refresh, > plus the state of the source tables and views it chose to track. Readers > can use it to decide whether the precomputed data is still fresh enough > to use. > > > To validate the design, we have proof-of-concept implementations in > Spark and Trino: > > Spark: https://github.com/apache/iceberg/pull/9830 > > Trino: https://github.com/trinodb/trino/pull/31027 > > We'd especially appreciate feedback from engine and catalog implementers > on whether the spec covers your use cases. Please leave comments on the > PR or reply to this thread. > > Thanks to everyone in the working group who contributed to the design > and reviews. > > Best, > Jan > >
