Thanks for the suggestions and comments. I have addressed them in the doc. I will also bring the proposal up to the community sync tomorrow.
Best, Yingjian On Fri, 13 Feb 2026 at 15:53, huaxin gao <[email protected]> wrote: > Thanks Yingjian for the proposal. I agree schema isolation is a gap for > branch-based workflows. I left a few comments on the proposal doc, mainly > around compatibility and merge semantics. Looking forward to more > feedback from the community. > > Best, > > Huaxin > > On Thu, Feb 12, 2026 at 8:59 PM Russell Spitzer <[email protected]> > wrote: > >> I think this is an interesting idea, I’m hoping we can get more folks to >> check it out. If there isn’t a lot of feedback on the dev list we should >> bring it up at the next community meeting >> >> On Thu, Feb 12, 2026 at 7:37 PM Yingjian Wu <[email protected]> >> wrote: >> >>> Hey all, >>> >>> Following up on the proposal above. >>> >>> TL;DR: I’m proposing *branch-specific schema evolution* so Iceberg >>> branches can evolve schemas independently instead of sharing a single >>> global schema. This enables: >>> >>> - Safe schema experimentation and migration testing on branches >>> without impacting production >>> - schema changes are isolated and only merged back when semantics >>> are unambiguous >>> >>> To support this, we’d need a spec change: add an optional *schemaId* to >>> *SnapshotRef* to record which schema a branch ref points to. >>> >>> More details can be found in this proposal doc >>> <https://docs.google.com/document/d/1yzE3Mm_ZALdWv_5HlMlGL0sk4-G4zU9oqxdo2ufQi3I/edit?tab=t.0#heading=h.g7zu7nim8ekj> >>> and >>> here is the Draft PR <https://github.com/apache/iceberg/pull/15012> for >>> the high level direction I am going. >>> >>> Looking forward to the feedback, thanks! >>> >>> Best, >>> Yingjian >>> >>> On Mon, 12 Jan 2026 at 15:23, Yingjian Wu <[email protected]> wrote: >>> >>>> Hey all, >>>> >>>> I'd like to start a discussion about supporting schema evolution on >>>> Iceberg branches, as there are some interests and some discussions around >>>> this feature. >>>> >>>> Would appreciate feedback on this proposal doc >>>> <https://docs.google.com/document/d/1yzE3Mm_ZALdWv_5HlMlGL0sk4-G4zU9oqxdo2ufQi3I/edit?tab=t.0#heading=h.g7zu7nim8ekj> >>>> and >>>> here is the Draft PR <https://github.com/apache/iceberg/pull/15012> for >>>> the high level direction I am going. >>>> >>>> Best, >>>> Yingjian >>>> >>>
