c-thiel commented on code in PR #14196:
URL: https://github.com/apache/iceberg/pull/14196#discussion_r2395273718
##########
open-api/rest-catalog-open-api.yaml:
##########
@@ -1903,6 +1926,34 @@ components:
schema:
type: string
+ idempotency-key:
+ name: Idempotency-Key
+ in: header
+ required: false
+ schema:
+ type: string
+ format: uuid
+ minLength: 36
+ maxLength: 36
+ example: "550e8400-e29b-41d4-a716-446655440000"
+ description: |
+ Optional client-provided idempotency key for safe request retries.
+
+ When present, the server ensures no additional effects for requests
that carry the same
+ Idempotency-Key within the same operation/resource scope. If a prior
request with this key
+ has been finalized, the server returns the previously finalized
response instead of
+ re-executing the mutation.
Review Comment:
As just discussed in the Catalog sync, the consensus in the community is
that it is OK to return newer Metadata to the client (i.e. current Metadata),
that is different from what a client would have obtained on a past request.
As a sidenote: This removes the idempotency property from this endpoint.
It would be good if we could reflect this in the wording here.
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