Re: Unclear\mistakable description of UPDATE behaviour in "13.2.1. Read Committed Isolation Level"

On Tue, Aug 17, 2021 at 11:18 PM radiodiversion <radiodiversion(at)gmail(dot)com>
wrote:

> change sentence: "The search condition of the command (the WHERE clause)
> is re-evaluated to see if the updated version of the row still matches the
> search condition."
>
with sentence: "The search condition of the command (the WHERE clause) is
> re-evaluated only for updated versions of rows to see if they still match
> the search condition. Note that this is different from re-executing the
> command."
>

I'm indifferent about adding the additional note about this not being a new
command start: while the whole of the paragraph makes it clear that once
the command begins it waits and then continues the added note isn't going
to make things worse.

I do not believe the "only for updated versions of rows" is an improvement
- the immediately preceding sentence already says exactly that. I'd rather
use fewer words in this already quite long paragraph.

David J.