yadavay-amzn opened a new pull request, #16319: URL: https://github.com/apache/iceberg/pull/16319
## Summary Adds ETag/If-None-Match support to `RESTTableOperations.refresh()` and `commit()`, so repeated refresh calls skip re-downloading unchanged table metadata. Follow-up to #15109 (freshness-aware table loading in REST catalog). ## Changes When `RESTTableOperations.refresh()` receives an ETag from the server, subsequent `refresh()` calls send `If-None-Match` and return the current metadata on `304 Not Modified`. The ETag is also captured from commit responses so the next refresh benefits immediately. This reduces bandwidth and server load for repeated refresh calls (retries, transactions, reconciliation) without any API changes or cache coupling. ## Scope This is the minimal self-contained slice of #15109. Deliberately out of scope: - FileIO credential refresh (blocked by `final` field, needs design discussion) - Cache callback to RESTSessionCatalog (adds coupling, can be a follow-up) - Config/credential updates on commit (REST spec does not include them) ## Testing 5 new tests in `TestRESTTableOperationsFreshness`: - ETag sent on second refresh - Current metadata returned on 304 - No header sent without prior ETag - ETag captured from commit response - If-None-Match merged with existing read headers ## Generative AI Generated-by: Claude Opus 4.7 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
