RussellSpitzer commented on code in PR #16294:
URL: https://github.com/apache/iceberg/pull/16294#discussion_r3770281538
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format/spec.md:
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@@ -960,6 +960,8 @@ A snapshot consists of the following fields:
| | | _required_ | **`added-rows`** |
The upper bound of the number of rows with assigned row IDs, see [Row
Lineage](#row-lineage) |
| | | _optional_ | **`key-id`** | ID
of the encryption key that encrypts the manifest list key metadata |
+In format version 4 and above, a snapshot's `timestamp-ms` must be strictly
greater than the `timestamp-ms` of its parent snapshot on the same branch. The
requirement applies only to snapshots committed while the table is at format
version 4 or higher; root snapshots, and snapshots that existed before a table
was upgraded to v4, are not constrained.
Review Comment:
I think we actually have a note about this in the appendix about how you
should do time travel because they aren't
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