Support storage-credentials in REST catalog LoadTableResult#3042
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rcjverhoef wants to merge 2 commits intoapache:mainfrom
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Support storage-credentials in REST catalog LoadTableResult#3042rcjverhoef wants to merge 2 commits intoapache:mainfrom
rcjverhoef wants to merge 2 commits intoapache:mainfrom
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The Iceberg REST spec's LoadTableResult includes a storage-credentials field for vended credentials (prefix-scoped temporary STS tokens). PyIceberg was only reading the config field and silently dropping storage-credentials, so vended credentials never reached the FileIO. Per the spec: "Clients must first check whether the respective credentials exist in the storage-credentials field before checking the config for credentials." This adds: - storage_credentials field to TableResponse - Longest-prefix credential resolution (mirroring Java's S3FileIO) - Merging resolved credentials into FileIO with highest precedence Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Rationale for this change
Vended credentials don't work with REST catalogs following latests specs. Per latest spec:
This is missing in pyiceberg. REST catalogs that don't expose a config field are hence not compatible.
Are these changes tested?
Yes, ran locally against my REST catalog implementation, added tests.
Are there any user-facing changes?
No API changes. REST catalogs that return vended credentials via storage-credentials will now work correctly.