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Dmitriy PavlovandChris Lu
1d0b97f4c6
* iceberg: normalize foreign day partitions during manifest rewrite * test: cover manifest rewrite with foreign day partitions * iceberg: restore every foreign partition value, not just day transforms iceberg-go takes a partition field's logical type from the last branch of its Avro union, so a writer that spells an optional partition [<type>, null] rather than [null, <type>] leaves the value as whatever the Avro decoder produced. A day or date partition then arrives as a time.Time the manifest writer cannot encode, and a time partition is worse: time.Duration converts to int64 nanoseconds and silently records the wrong value. ReadManifest sits next to ReadManifestList, the other shim for what foreign writers put on the wire, and converts each partition value back to the Iceberg representation for its field type. Claude-Session: https://claude.ai/code/session_01FdQyRuWF9SuCnPn21iH9yR * iceberg: read manifests that carry partition values through the shim Compaction, delete rewrite and their detection passes read entries and write the same partition values back into new manifests, so they fail on a foreign day partition exactly as manifest rewrite does. Where filters see it too: literalMatchesActual falls through to fmt.Sprint, so a time.Time renders as a timestamp and never matches the day the user asked for. The two remaining readers, orphan collection and the admin preview, only look at file paths and stay on iceberg.ReadManifest. Claude-Session: https://claude.ai/code/session_01FdQyRuWF9SuCnPn21iH9yR * iceberg: convert partition values before the writer rebinds logical types Dimonyga checked the manifests of a live Doris table: every input spells the partition union null-first, with the date logical type present, so the union ordering is not what breaks the merge. The conversion is lazy. iceberg-go converts what the Avro decoder returned on the first Partition() call, using the logical types read from the manifest being parsed, and ManifestWriter.addEntry rebinds them to the manifest it is about to write before it makes that call. A day partition is where the two disagree -- iceberg-go's day transform reports an int32 result type, so the manifest it writes carries no date logical type at all -- and an entry nobody looked at in between converts against that and keeps its time.Time. That is why only rewrite_manifests failed: compaction and delete rewrite group entries by partitionKey(df.Partition()) first, which converts them, and a where filter does the same. Reading every entry's partition here converts them all while the manifest's own logical types are still in place. Claude-Session: https://claude.ai/code/session_01FdQyRuWF9SuCnPn21iH9yR --------- Co-authored-by: Chris Lu <chris.lu@gmail.com>