This Week at a Glance
The Iceberg community opened a formal scoping discussion for the v4 table spec, with Daniel Weeks laying out three workstream categories and contributors already adding collation and column updates to the list.
Steven Wu proposed making Iceberg v4 manifests Parquet-only, and early responses from Anoop Johnson, Russell Spitzer, and Manu Zhang all point toward a single-format future.
PyIceberg 0.12.0rc1 drew a binding -1 from Kevin Liu after a user reported a correctness regression, so a new release candidate is coming.
Apache Polaris shipped 1.7.0 with Kafka event publishing and GCS principal attribution, then disclosed CVE-2026-64640, a low-severity flaw in the register endpoint.
