What is SKIP LOCKED for in PostgreSQL?

[s4i]

https://www.2ndquadrant.com/en/blog/what-is-select-skip-locked-for-in-postgresql-9-5/

[andrewstuart]

SKIP LOCKED lets you write queues.

It’s also available in MySQL and SQL Server.

I wrote a “simpler than SQS” http based queue in Python using SKIP LOCKED.

https://github.com/starqueue/starqueue