Issues

• UPDATE writes a guessed _row_id for rows inserted in the same transaction (v3)

  duckdb/duckdb-iceberg#1543 · Filter by author azwanzuharimi opened on Oct 9, 2026

• v1.5: cardinality estimate underflows when position deletes exceed data rows (Information loss on integer cast); backport 3369b78d5

  duckdb/duckdb-iceberg#1537 · Filter by author EEPiso opened on Oct 9, 2026

• [FEATURE] Support dynamic partition overwrite for inserts

  needs triage
  duckdb/duckdb-iceberg#1519 · Filter by author botan opened on Oct 6, 2026

• Preserve fixed[L] data type in alter table schema and honor length size

  needs triage
  duckdb/duckdb-iceberg#1504 · Filter by author lliangyu-lin opened on Oct 6, 2026

• [1.5] TIMESTAMPTZ year/month/day/hour partition values follow the session TimeZone on INSERT (fixed on main by #1360, backport request)

  duckdb/duckdb-iceberg#1503 · Filter by author jatorre opened on Oct 6, 2026
  1

• [FEATURE] Support writes on iceberg v1 table

  needs triage
  duckdb/duckdb-iceberg#1492 · Filter by author lliangyu-lin opened on Oct 2, 2026
  3

• [1.5] Apache Iceberg scan: three metadata-driven terminate calls on v1.5.5 (clean on v1.1.0)

  duckdb/duckdb-iceberg#1468 · Filter by author d3do-23 opened on Sep 30, 2026
  4

• [1.5] Delete manifest file first_row_id is set violating Iceberg spec

  needs triage
  duckdb/duckdb-iceberg#1466 · Filter by author dmivankov opened on Sep 30, 2026
  1

• [1.5] Equality deletes: "Comparison on NULL values" with NULL partition values, and deletes applied across partitions (1.5.x, fixed on main, backport request)

  duckdb/duckdb-iceberg#1465 · Filter by author DannyMor opened on Sep 30, 2026

• && no longer prunes data files or row groups in iceberg_scan on the 2.0 nightly (1.5.6 does)

  duckdb/duckdb-iceberg#1464 · Filter by author jatorre opened on Sep 30, 2026
  4

• iceberg_metadata() ignores catalog's loadTable location when explicit version is supplied against a nested-namespace identifier, falls back to a bogus literal path

  needs triage
  duckdb/duckdb-iceberg#1452 · Filter by author tbollhofer-volo opened on Sep 25, 2026
  1

• Vended credential cross-scheme fallback broadens nested scopes to the table root

  needs triage
  duckdb/duckdb-iceberg#1390 · Filter by author 1412904892 opened on Sep 9, 2026

• [FEATURE] Refreshable bearer authentication for REST catalogs (Microsoft Entra ID)

  duckdb/duckdb-iceberg#1374 · Filter by author HynekBlaha opened on Sep 8, 2026

• [FEATURE] Support HDFS storage

  needs triage
  duckdb/duckdb-iceberg#1370 · Filter by author rmannibucau opened on Sep 4, 2026

• Unfiltered LIMIT reads every manifest in the snapshot (OOM on tables with very many manifests)

  duckdb/duckdb-iceberg#1369 · Filter by author haoxu0 opened on Sep 3, 2026
  4

• Iceberg query results show NULL for nested structs when using attached catalog but works fine with iceberg_scan()

  needs triage
  duckdb/duckdb-iceberg#1359 · Filter by author xin-luo-dragon opened on Aug 27, 2026
  6

• [FEATURE] Support Incremental Reads Between Iceberg Snapshots for Append-Only Tables

  needs triage
  Feature

  duckdb/duckdb-iceberg#1355 · Filter by author MehulBatra opened on Aug 24, 2026
  9

• Expired vended storage credentials are reused on subsequent table scans

  needs triage
  duckdb/duckdb-iceberg#1352 · Filter by author yoogoc opened on Aug 23, 2026
  5

• Cloud Test Failures

  duckdb/duckdb-iceberg#1329 · Filter by author github-actions opened on Aug 15, 2026
  59

• [FEATURE] Implement IcebergScanSerialize and IcebergScanDeserialize for common_subplan optimizer

  needs triage
  duckdb/duckdb-iceberg#1271 · Filter by author mateczagany opened on Aug 3, 2026

• Plan-time metadata-only DELETE: drop fully-covered data files from manifest bounds without scanning

  duckdb/duckdb-iceberg#1260 · Filter by author paultmathew opened on Jul 30, 2026
  6

• [FEATURE] Support for Iceberg branches and tags

  enhancement
  Feature

  duckdb/duckdb-iceberg#1252 · Filter by author quodlibetor opened on Jul 29, 2026
  7

• [FEATURE] Support custom snapshot summary properties on Iceberg writes

  Feature

  duckdb/duckdb-iceberg#1249 · Filter by author tecbot opened on Jul 28, 2026

• [Server-Side Scan Planning] Enable scan planning for queries using _last_updated_sequence_number

  duckdb/duckdb-iceberg#1224 · Filter by author Tishj opened on Jul 25, 2026

• allow_moved_paths doesn't appear to escape spaces properly

  needs triage
  duckdb/duckdb-iceberg#1177 · Filter by author C-Loftus opened on Jul 14, 2026
  1