Re: [WIP PATCH] Index scan offset optimisation using visibility map

Hello.

> Sorry, seems like I've incorrectly expressed what I wanted to say.
> I mean this Assert() can be checked before loop, not on every loop cycle.

Yes, I understood it. Condition should be checked every cycle - at least it is done this way for index only scan:  https://github.com/postgres/postgres/blob/master/src/backend/executor/nodeIndexonlyscan.c#L234