Fokko commented on code in PR #12644:
URL: https://github.com/apache/iceberg/pull/12644#discussion_r2021334130
##########
format/spec.md:
##########
@@ -1414,12 +1414,16 @@ Each partition field in `fields` is stored as a JSON
object with the following p
| V1 | V2 | V3 | Field | JSON representation |
Example |
|----------|----------|----------|------------------|---------------------|--------------|
-| required | required | omitted | **`source-id`** | `JSON int` | 1
|
Review Comment:
Ah, I see the confusion. Some examples. In the case of a single arg:
```json
{"field-id": 1000, "source-id": 1, "name": "bucket_user_id", "transform":
"bucket[16]"}
```
In the case of a multi-arg:
```json
{"field-id": 1000, "source-ids": [1, 2], "name": "bucket_user_id",
"transform": "bucket[16]"}
```
So, they are mutually exclusive, and one of them is required, indicated by
the `ยน`. The benefit is that we don't have to carry the `format-version` to the
serializers.
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