chore: Add comment on SKIP LOCKED clause

PostHog · Nov 30, 2023 · c6ab642 · c6ab642
1 parent ec6ba09
commit c6ab642
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/hook-common/src/pgqueue.rs b/hook-common/src/pgqueue.rs
@@ -131,6 +131,8 @@ impl PgQueue {
     pub async fn dequeue<J: DeserializeOwned + std::marker::Send + std::marker::Unpin + 'static>(
         &self,
     ) -> PgQueueResult<Job<J>> {
+        // The query that follows uses a FOR UPDATE SKIP LOCKED clause.
+        // For more details on this see: 2ndquadrant.com/en/blog/what-is-select-skip-locked-for-in-postgresql-9-5.
         let base_query = format!(
             r#"
 WITH available_in_queue AS (