huaxingao commented on code in PR #14196:
URL: https://github.com/apache/iceberg/pull/14196#discussion_r2417640456
##########
open-api/rest-catalog-open-api.yaml:
##########
@@ -1903,6 +2003,39 @@ 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 an equivalent final response
without re-running the
+ operation. The response body may reflect a newer state of the table
than existed at the
+ time of the commit.
+
+ Finalization rules:
+ - Finalize & replay: 200, 201, 204, and deterministic terminal 4xx
+ - Do not finalize (not stored/replayed): 5xx, 409
(RequestInProgressException)
+
+ Key Requirements:
+ - Key format: UUID (V7 preferred) in string format as defined in RFC
9562 Section 4.
+ See https://datatracker.ietf.org/doc/html/rfc9562#sampleStringUUID
for the textual
+ representation specification.
+ - Scoped to operation type and resource path; the idempotency key must
be unique per
+ (operation type, resource path) pair (e.g., updateTable on db.t1)
+ - Catalogs MUST NOT expire keys before the end of the advertised token
lifetime.
Review Comment:
The `idempotency-key-lifetime` section has a bit more info and mentioned
about the grace period.
https://github.com/apache/iceberg/blob/a58e6987c3edcc2a5641e8dd4a731f7b905abcce/open-api/rest-catalog-open-api.yaml#L2108.
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