Unconventional PostgreSQL Optimizations 6 months ago
The most interesting thing for me in this article was the mention of `MERGE` almost in passing at the end.
I'm not a big fan of using the constraint names in SQL, so to overcome both limitations I'd use MERGE instead:
``` db=# MERGE INTO urls t USING (VALUES (1000004, 'https://hakibenita.com')) AS s(id, url) ON t.url = s.url WHEN MATCHED THEN UPDATE SET id = s.id WHEN NOT MATCHED THEN INSERT (id, url) VALUES (s.id, s.url); MERGE 1 ```
I use `insert ... on conflict do update ...` all the time to handle upserts, but it seems like merge may be more powerful and able to work in more scenarios. I hadn't heard of it before.