Hi all, Thank you for all the discussion this week on the community sync. We had a couple of items raised around: - The repository naming - Verifying the implementations' correctness via the artifacts on both reads and writes.
Please take a look and add your feedback on the proposal [1] document for any suggestions, thoughts, or enhancements. In addition, I'll check back in a week and see where the proposal goes, and maybe set up a dedicated sync if folks would like to dive deeper on this. Thanks, Neelesh, Sung, Andrei [1] Shared test fixtures for Apache Iceberg implementations Proposal <https://docs.google.com/document/d/1Qr82hccxJhWxKRT7B-3ylhOLSaJTYfc7hU51-mhzK6Y/edit?usp=sharing> On Tue, Jul 14, 2026 at 7:16 AM Neelesh Salian <[email protected]> wrote: > Hi all, > > Sung and I each started a thread on this recently [1][2], and together > with Andrei the discussion converged on a single design. > > We've merged them into one proposal: a standalone, language-neutral > repository of conformance fixtures - starting with static inputs paired > with the expected value the spec fixes - modeled on parquet-testing, so > each implementation checks its reading of the spec against a shared set > instead of only against itself. > > There are working POCs: Sung's iceberg-testing fork [3] with pyiceberg [4] > and > iceberg-rust [5], and iceberg-go's engine-free variant checks [6]. > > Document: [Proposal > <https://docs.google.com/document/d/1Qr82hccxJhWxKRT7B-3ylhOLSaJTYfc7hU51-mhzK6Y/edit?usp=sharing> > ] > > The plan: start with the smallest primitives (type strings, transforms), > grow outward > to binary fixtures; no harness and no central gate - each implementation > pins the repo > and asserts in its own suite; Java and Go first, covering v2 and v3. > > Feedback welcome on this and happy to set up a short sync for anyone who > wants to dig in. > > Thanks, > Neelesh, Sung, Andrei > > [1] https://lists.apache.org/thread/964630c6q0jovs579x1jzb1t0o19jgjg > [2] https://lists.apache.org/thread/87cvl9gk0cjk1of7jh3nvm4lzvzxnc8m > [3] https://github.com/sungwy/iceberg-testing > [4] https://github.com/sungwy/iceberg-python/pull/1 > [5] https://github.com/sungwy/iceberg-rust/pull/2 > [6] https://github.com/apache/iceberg-go/pull/1238 > >
