rdblue commented on code in PR #4945:
URL: https://github.com/apache/iceberg/pull/4945#discussion_r928162355
##########
format/spec.md:
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@@ -632,6 +632,29 @@ When expiring snapshots, retention policies in table and
snapshot references are
2. The snapshot is not one of the first `min-snapshots-to-keep` in the
branch (including the branch's referenced snapshot)
5. Expire any snapshot not in the set of snapshots to retain.
+#### Snapshot statistics
+
+Snapshot statistics files are valid [Puffin files](../puffin-spec). Statistics
are informational. A reader can choose to
+ignore statistics information. Statistics support is not required to read the
table correctly.
+
+Statistics files metadata within `snapshot-statistics` table metadata field is
a struct with the following fields:
Review Comment:
I don't think that these should be "snapshot statistics" since these aren't
part of `snapshot`. These are actually table statistics that are associated
with a particular snapshot of the table. I think that `statistics` or
`table-statistics` are better names.
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