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Chris LuandGitHub
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* s3tables: read Iceberg manifest lists that omit the Avro format version The Iceberg spec pins the Avro header metadata of manifest files but says nothing about manifest lists, so writers disagree. Java and PyIceberg record "format-version"; DuckDB writes no header metadata at all. iceberg-go reads a missing entry as v1, so every v2 manifest listed in a DuckDB-written list is rejected with manifest file's 'format-version' metadata indicates version 2, but entry from manifest list indicates version 1 and, because v1 has no "content" field, delete manifests silently decode as data manifests. ReadManifestList derives the version from the record schema the writer embedded - v2 added "content" and the sequence numbers, v3 added "first_row_id" - and splices it into the header before handing the bytes to iceberg-go. Lists that already carry the entry, and input that is not a parseable Avro container, go through untouched. * iceberg: parse DuckDB-written manifest lists in maintenance and data preview Every manifest list read - the four maintenance operations and the admin table data preview - went straight to iceberg-go, so tables written by DuckDB failed detection and all of compact, remove_orphans, rewrite_manifests and expire_snapshots before they touched anything. Route them through s3tables.ReadManifestList, which recovers the format version the writer left out of the Avro header. This also restores the manifest content type on those tables: with the list read as v1 every delete manifest looked like a data manifest, which hid deletes from the compaction guard and made the preview report a table with position deletes as having none.