From 8a4ddf4f4d6f2b9e4b210d258e4f3df98fd0c3dd Mon Sep 17 00:00:00 2001
From: Philipp Oppermann <dev@phil-opp.com>
Date: Fri, 13 Jun 2025 14:25:44 +0200
Subject: [PATCH] Use UUID v7 instead of v4 for build and session IDs

V7 UUIDs include a timestamp and are sortable. This is useful to see which ID is newer.
---
 libraries/message/src/lib.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/libraries/message/src/lib.rs b/libraries/message/src/lib.rs
index 365eab9f..962176f5 100644
--- a/libraries/message/src/lib.rs
+++ b/libraries/message/src/lib.rs
@@ -24,7 +24,7 @@ pub mod coordinator_to_cli;
 
 pub use arrow_data;
 pub use arrow_schema;
-use uuid::Uuid;
+use uuid::{Timestamp, Uuid};
 
 pub type DataflowId = uuid::Uuid;
 
@@ -35,7 +35,7 @@ pub struct SessionId(uuid::Uuid);
 
 impl SessionId {
     pub fn generate() -> Self {
-        Self(Uuid::new_v4())
+        Self(Uuid::new_v7(Timestamp::now(uuid::NoContext)))
     }
 }
 
@@ -52,7 +52,7 @@ pub struct BuildId(uuid::Uuid);
 
 impl BuildId {
     pub fn generate() -> Self {
-        Self(Uuid::new_v4())
+        Self(Uuid::new_v7(Timestamp::now(uuid::NoContext)))
     }
 }