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feat(encryption): [13/N] Write encrypted Parquet data files - #4328
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xanderbailey wants to merge 2 commits into
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xanderbailey wants to merge 2 commits into
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Data files of a table with encryption.key-id are written with Parquet modular encryption, using a fresh key and AAD prefix per file, and the key metadata is recorded on the DataFile. Like Java, the AAD prefix is not stored in the file.
xanderbailey
commented
Nov 10, 2026
| file_schema: Schema, | ||
| properties: Properties, | ||
| ) -> FileFormatWriter: ... | ||
| key_metadata: StandardKeyMetadata | None = None, |
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Interested in thoughts here, we can add default as None here to not break existing callers but it does mean you need to provide it when we need it
Keeps plaintext writes working with FileFormatModel implementations that predate the key_metadata argument.
xanderbailey
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November 10, 2026 23:43
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Working towards #3222
Rationale for this change
First write-side PR: data files of an encrypted table are written with Parquet Modular Encryption.
DataFile'skey_metadata.Commits to v3 tables still fail at the manifest writer, so encrypted manifests come next once #3624 lands.
Are these changes tested?
Yes,
write_fileon an encrypted table writes encrypted files that read back through a scan. I also checked iceberg-rust can read one.Are there any user-facing changes?
No.