plusplusjiajia opened a new pull request, #2651:
URL: https://github.com/apache/iceberg-rust/pull/2651
## What
load_table / create_table now request vended credentials via the
`X-Iceberg-Access-Delegation: vended-credentials` header and merge the
returned
`storage_credentials` into the FileIO properties. `LoadTableResult` already
exposes `storage_credentials` (its doc even says clients should prefer it
over
`config`), but the field was never used.
## Why
REST catalogs that vend per-table credentials return them in
`storage_credentials`. Without requesting delegation and merging them, FileIO
is built without credentials and data access fails.
## Changes
- Send `X-Iceberg-Access-Delegation: vended-credentials` on load/create.
- New `table_file_io_config()` merges config + storage_credentials
(longest prefix wins) + catalog props.
- `update_table` reloads after commit to return a credentialed FileIO
(CommitTableResponse carries no credentials).
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