Re: Schema variables - new implementation for Postgres 15

Alvaro Herrera:
> Perhaps the solution to all this is to avoid having the variables be
> implicitly present in the range table of all queries.  Instead, if you
> need a variable's value, then you need to add the variable to the FROM
> clause;

+1

This should make it easier to work with composite type schema variables 
in some cases.  It could also enable schema qualifying of schema 
variables, or at least make it easier to do, I think.

In this case variables would share the same namespace as tables and 
views, right?  So I could not create a variable with the same name as 
another table.  Which is a good thing, I guess.  Not sure how it's 
currently implemented in the patch.

Best,

Wolfgang