Re: update behavior

> On Jun 19, 2025, at 1:23 PM, Scott Ribe <scott_ribe(at)elevated-dev(dot)com> wrote:
>
> I believe that if I UPDATE a row with the same values that it already has, this still dirties pages, writes the row, generates a WAL entry. There is no shortcut in the processing that's "hey, there's not really a change here, we'll just leave storage alone".
>
> Is this correct?

Correct, but it can be avoided.

No update occurs in this case:.

update foo
set data = ‘hello world’
where id = 33
and data is distinct from ‘hello world’
;