2025-03-27 kernel meeting notes

[zachschuermann]

Summary

0.9.0 inbound, a number of breaking changes (and non-breaking! - v2checkpoint reads)

ongoing threads

• IN/NOT IN PR to merge @roeap
• predicate/expressions split @scovich (putting up a bunch of stacked commits - top-level feedback)
• merge opaque expressions @scovich
• merge IN/NOT IN deprecation @zachschuermann
• snapshot incremental API: Snapshot::try_new_from(Arc<Snapshot>) -> Arc<Snapshot> about to merge @zachschuermann
• @hntd187 targeting CDF reads, need timestamp work

Attendees

@nicklan @sebastiantia @hntd187 @zachschuermann @roeap @scovich

notes stream

• going over open threads
• we just merged pub(crate) actions
• zach: needs reviews - (1) snapshot try_new_from PR, (2) null_row PR, unblocking lots of work!
• steve has PR for typed features: refactor!: adopt types for table features #684
  • error on unknown table features. tyler: users of delta-rs have outdated versions, DBR has update that produces new features, breaks legacy readers on that table. note definition of reader feature is you cannot read the data anymore without understanding that reader feature.
• sebastians prefactors for checkpoint writes
• 0.9.0 after breaking changes land (zach/steve)