Spec: clarify Avro encoding for day partition transform in manifests#16446
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Spec: clarify Avro encoding for day partition transform in manifests#16446laskoviymishka wants to merge 1 commit into
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Documents that writers SHOULD encode `day` partition fields in Avro manifests with `logicalType: date` and readers MUST accept both plain `int` and `int` with `logicalType: date`. The logical Iceberg result type remains `int`. Resolves the ambiguity between the spec's transform result type table (`int`) and the de facto behavior of Java, PyIceberg, and Rust (logical `date`), which has caused real interop failures. Issue: apache#16414 Discussion: https://lists.apache.org/thread/qqw5oog5swmswxqqmp693vz1rw132xb6
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Documents that writers SHOULD encode
daypartition fields in Avro manifests withlogicalType: dateand readers MUST accept both plainintandintwithlogicalType: date. The logical Iceberg result type remainsint.Resolves the ambiguity between the spec's transform result type table (
int) and the de facto behavior of Java, PyIceberg, and Rust (logicaldate), which has caused real interop failures.Issue: #16414
Discussion: https://lists.apache.org/thread/qqw5oog5swmswxqqmp693vz1rw132xb6