Re: update behavior

[Rui DeSousa <rui@xxxxxxxxxxxxx>]

On Jun 19, 2025, at 1:23 PM, Scott Ribe <scott_ribe@xxxxxxxxxxxxxxxx> 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 = "" world’

where id = 33

   and data is distinct from ‘hello world’

;