Hi Dan, Thanks for the summary. When you say "Column Append," are you referring to efficient column updates[1]? Besides new features, Huaxin has initiated a discussion about deprecating equality deletes which remains unresolved[2]. BTW, it looks the video of the last Community Sync hasn't been uploaded[3]. Does anyone know about it?
1. https://www.youtube.com/watch?v=dDZKzz3PKIk 2. https://lists.apache.org/thread/ks01jpv40qjlvz4yop5tlqv4x5oxbwy6 3. https://www.youtube.com/@ApacheIceberg/videos Thanks, Manu On Wed, Aug 12, 2026 at 6:16 AM Steven Wu <[email protected]> wrote: > I would like to add one item to the "Table features" that we previously > discussed and agreed upon [1]. > - Monotonic snapshot timestamp and a new *_last_updated_timestamp_ms* metadata > column that can inherit from the snapshot timestamp. > > I know there is also an ongoing discussion on collation. > > 1. https://lists.apache.org/thread/cln7xtjy9kw2096gzqlg5c4gg8b9td10 > > > On Tue, Aug 11, 2026 at 2:42 PM Daniel Weeks <[email protected]> wrote: > >> Hey Everyone, >> >> At the last Iceberg Community Sync, I raised the topic of opening a >> discussion on how we want to scope v4 to arrive at a shared understanding >> of what we want to land in the next table spec version. Anyone who >> regularly attends conferences, meetups, or syncs is likely familiar with >> specific efforts currently in flight, but as a community, we haven't >> defined what we believe constitutes a cohesive set of capabilities to >> target for the next release. >> >> It's early enough at this point to start a discussion and still have time >> to include critical features not yet identified or push back anything that >> may either be underdeveloped or poorly understood. >> >> Broadly speaking, the various ongoing workstreams fall into three main >> categories: >> >> *Content Metadata Updates* >> - Adaptive Metadata Tree (AMT) / Single File Commits >> - Column Statistics >> - Relative Paths >> - Column Append >> >> *Table Features* >> - Check Constraints >> - Default Value Expressions >> - Generated Columns >> >> *Data Types* >> - File Type >> - Vector Type >> >> Some have only recently been proposed (e.g. Vector Type and Generated >> Columns), while others have been discussed for over a year and are well >> into implementation (e.g. AMT and Stats). >> >> While many non-table format discussions and efforts are ongoing (MVs, >> Indexing, REST), focusing attention on what aligns with the v4 release and >> communicating the scope and progress of that effort would be helpful. For >> the last release, we used a combination of GitHub milestones and projects >> (some exist for v4 efforts but are currently incomplete/unmaintained), >> which I believe many found helpful. >> >> I'd like to hear everyone's thoughts: >> - Does this algin with everyone's interests in v4? >> - Are there features we've discussed that should/shouldn't be included? >> - Do we want to start tracking progress across these efforts? >> >> Looking forward to discussion and feedback, >> -Dan >> >
