Iceberg matrix
Capability coverage, V2 and V3.
SQE is scored against the public Iceberg matrix rubric — a community scoreboard, not a vendor spec sheet. Each capability is rated full, partial, or none for format versions V2 and V3. The per-cell evidence lives in the source repository.
147/162
90.7% coverage
Self-reported against the current public Iceberg matrix rubric.
Full (43) Partial (9) None (2)
| Capability | V2 | V3 |
|---|---|---|
| Aws glue catalog | Full | Full |
| Bloom filters | Full | Full |
| Branching tagging | Full | Full |
| Catalog integration | Full | Full |
| Column default values | — | Full |
| Copy on write | Full | Full |
| Deletion vectors | — | Full |
| Equality deletes | Full | Full |
| Geometry type | — | None |
| Google lakehouse | Partial | Partial |
| Hidden partitioning | Full | Full |
| Lineage | — | Full |
| Merge on read | Full | Full |
| Multi arg transforms | — | None |
| Nanosecond timestamps | — | Full |
| Partition evolution | Full | Full |
| Position deletes | Full | — |
| Read support | Full | Full |
| Rest catalog | Full | Full |
| Schema evolution | Full | Full |
| Shredded variant | — | Partial |
| Snowflake horizon catalog | Partial | Partial |
| Statistics | Full | Full |
| Table creation | Full | Full |
| Table maintenance | Full | Full |
| Time travel | Full | Full |
| Type promotion | Full | Full |
| Unity catalog | Partial | Partial |
| Unknown type | — | Partial |
| Variant type | — | Partial |
| Write insert | Full | Full |
| Write merge update delete | Full | Full |
Catalogs outside the current rubric
The current Iceberg matrix rubric no longer scores catalog rows for Polaris, Nessie, Hive Metastore, JDBC or Hadoop. SQE still supports them; the table below says how each is tested today.
| Catalog | Support | Testing today |
|---|---|---|
| Apache Polaris | Read + write | Primary target catalog: the Polaris + Keycloak and Ranger quickstarts run against it end to end. |
| Project Nessie | Read + write (Iceberg REST) | Runnable quickstart and a live namespace round-trip test, run manually. |
| Hive Metastore | Read + write | Live round-trip test against a standalone metastore container, run manually, not in CI. |
| JDBC (PostgreSQL) | Read + write | Live round-trip tests, including a V3 table, run manually against PostgreSQL, not in CI. |
| Hadoop (storage-only) | Read only | Auto-discovery unit test; object-store integration test run manually. Writes go through a real catalog. |