Thread: Re: update behavior

Re: update behavior

From

Rui DeSousa

Date:

19 June, 20:57:20

On Jun 19, 2025, at 1:23 PM, Scott Ribe <scott_ribe@elevated-dev.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’

;