I think I squealed with delight when I read this title. This is really a great addition, and will simplify so much of my code once I'm able to upgrade.
I try not to think too deeply about all the DB internals (some people are much smarter than me about this stuff), but clearly there are a lot of things that need maintained internally to make this correct, so kudos to all the people who contributed to this.
A big +1 to this. Peter Geoghegan is the primary author and has been championing it for over 2 Postgres releases now. I know he's especially excited to see it land.
Also it couldn't have been possible without the support of Heikki and Andres (who actually submitted this to HN as his first ever submission).
I try not to think too deeply about all the DB internals (some people are much smarter than me about this stuff), but clearly there are a lot of things that need maintained internally to make this correct, so kudos to all the people who contributed to this.