danielcweeks commented on code in PR #18526:
URL: https://github.com/apache/iceberg/pull/18526#discussion_r4461599889
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format/spec.md:
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@@ -522,15 +522,17 @@ The set of metadata columns is:
| **`2147483541 _commit_snapshot_id`** | `long` | The
snapshot ID in which the change occurred
|
| **`2147483540 _row_id`** | `long` | A unique
long assigned for row lineage, see [Row Lineage](#row-lineage)
|
| **`2147483539 _last_updated_sequence_number`** | `long` | The
sequence number which last updated this row, see [Row Lineage](#row-lineage)
|
+| **`2147483538 _last_updated_time`** | `timestamptz` | The
timestamp of the snapshot which last updated this row (v4 and later), see [Row
Lineage](#row-lineage) |
Review Comment:
Why is this `timestamptz` vs `timestamp`? Other fields we tract timestamp
values as long would be equivalent to timestamp without timezone. This seems
strange that we would use a timezone specific representation.
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