gaborkaszab commented on code in PR #17533:
URL: https://github.com/apache/iceberg/pull/17533#discussion_r3787049151
##########
format/spec.md:
##########
@@ -1209,15 +1207,16 @@ many statistics files associated with different table
snapshots.
Statistics files metadata within `statistics` table metadata field is a struct
with the following fields:
-=== "v1 - v3"
- | v1 | v2 and v3 | Field name | Type
| Description |
- | ---------- | ----------
|---------------------------------|-----------------------|-------------|
- | _required_ | _required_ | **`snapshot-id`** | `long`
| ID of the Iceberg table's snapshot the statistics file is associated
with. |
- | _required_ | _required_ | **`statistics-path`** | `string`
| Path of the statistics file. See [Puffin file
format](puffin-spec.md). |
- | _required_ | _required_ | **`file-size-in-bytes`** | `long`
| Size of the statistics file. |
- | _required_ | _required_ | **`file-footer-size-in-bytes`** | `long`
| Total size of the statistics file's footer (not the footer payload
size). See [Puffin file format](puffin-spec.md) for footer definition. |
- | _optional_ | _optional_ | **`key-metadata`** |
| Base64-encoded implementation-specific key metadata for encryption. |
- | _required_ | _required_ | **`blob-metadata`** | `list<blob
metadata>` (see below) | A list of the blob metadata for statistics contained
in the file with structure described below. |
+=== "v1 - v4"
+ | v1 and v2 | v3 | v4 | Field name |
Type | Description |
Review Comment:
That is intentional. These columns are the same between "v1" and "v2 and
v3". Initially I figured we could merge all these together, but I figured we
might want to deprecate `key-metadata` earlier in V3 so kept that version
separately. I can revert if this is distracting.
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