feat(types): add Variant type with non-shredded codec and encryption-keys metadata#23
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abnobdoss wants to merge 4 commits into
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feat(types): add Variant type with non-shredded codec and encryption-keys metadata#23abnobdoss wants to merge 4 commits into
abnobdoss wants to merge 4 commits into
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added 4 commits
June 23, 2026 08:40
Adds VariantType primitive (parses/serializes 'variant', min format v3) and a pure-python encoder/decoder for the Parquet Variant binary format (metadata dictionary + value: null/bool/int/double/string/object/array), independent of PyArrow's still-unimplemented variant extension type (apache/arrow#45937, #50131, #50132 all open).
…#2118) Adds metadata-only encryption fields (no crypto/KMS): EncryptedKey model (key-id, encrypted-key-metadata, encrypted-by-id, properties) matching the Java EncryptedKeyParser; optional encryption-keys list on TableMetadataV3 and optional key-id on Snapshot. Read/deserialize + alias round-trip only; V3 full-write still raises NotImplementedError upstream (apache#1551).
Place offset_size_minus_one in metadata header bits 6-7 and check the reserved bit at bit 5, matching the Parquet Variant spec (previously bits 5-6 / bit 7, which only round-tripped with itself and rejected valid metadata using a 3- or 4-byte offset size). Add decimal, date, timestamp, binary and float primitive support, byte-level spec assertions, and edge-case tests (empty object/array, large dictionary, float decode).
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