SET feature

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/15/sql-set.html
Description:

Hi,

I remember in version 9 , to use variable you had to change in the
postgresql. 

Today it is easier , just use

SET SESSION myprefix.myvariable =  'whatever' 

and all the transactions can use it , it is very useful in some cases, for
example to track the author of a change , you don't need to change all your
java/php/python code , just use a trigger on the table to fill up a column
"change_by"

I've checked the documentation and that feature is not explained at all, not
even in the SET Command.

Hope it  helps


Regards,

Sparkx