jacobmarble commented on code in PR #8683:
URL: https://github.com/apache/iceberg/pull/8683#discussion_r1361135225


##########
format/spec.md:
##########
@@ -971,8 +985,10 @@ The 32-bit hash implementation is 32-bit Murmur3 hash, x86 
variant, seeded with
 | **`decimal(P,S)`** | `hashBytes(minBigEndian(unscaled(v)))`[2] | `14.20` → 
`-500754589`                     |
 | **`date`**         | `hashInt(daysFromUnixEpoch(v))`           | 
`2017-11-16` → `-653330422`                |
 | **`time`**         | `hashLong(microsecsFromMidnight(v))`      | `22:31:08` 
→ `-662762989`                  |
-| **`timestamp`**    | `hashLong(microsecsFromUnixEpoch(v))`     | 
`2017-11-16T22:31:08` → `-2047944441`      |
-| **`timestamptz`**  | `hashLong(microsecsFromUnixEpoch(v))`     | 
`2017-11-16T14:31:08-08:00`→ `-2047944441` |
+| **`timestamp`**    | `hashLong(microsecsFromUnixEpoch(v))`     | 
`2017-11-16T22:31:08` → `-2047944441`<br />`2017-11-16T22:31:08.000001` → 
`-1207196810` |
+| **`timestamptz`**  | `hashLong(microsecsFromUnixEpoch(v))`     | 
`2017-11-16T14:31:08-08:00` → `-2047944441`<br 
/>`2017-11-16T14:31:08.000001-08:00` → `-1207196810` |
+| **`timestamp_ns`** | `hashLong(nanosecsFromUnixEpoch(v))`      | 
`2017-11-16T22:31:08` → `-737750069`<br />`2017-11-16T22:31:08.000001` → 
`-976603392`<br />`2017-11-16T22:31:08.000000001` → `-160215926` |
+| **`timestamptz_ns`** | `hashLong(nanosecsFromUnixEpoch(v))`    | 
`2017-11-16T14:31:08-08:00` → `-737750069`<br 
/>`2017-11-16T14:31:08.000001-08:00` → `-976603392`<br 
/>`2017-11-16T14:31:08.000000001-08:00` → `-160215926` |

Review Comment:
   I've added the unit tests to #8658 : 
https://github.com/apache/iceberg/pull/8658/commits/bc50195cc0f78d42cb18b6fa8021f882066c694d



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