Re: proposal: schema variables

On Sat, 2021-04-10 at 08:58 +0200, Pavel Stehule wrote:
> I am sending a strongly updated patch for schema variables.
>
> I rewrote an execution of a LET statement. In the previous implementation I hacked
> STMT_SELECT. Now, I introduced a new statement STMT_LET, and I implemented a new
> executor node SetVariable. Now I think this implementation is much cleaner.
> Implementation with own executor node reduces necessary work on PL side - and allows
> the LET statement to be prepared - what is important from a security view.
>
> I'll try to write a second implementation based on a cleaner implementation like
> utility command too. I expect so this version will be more simple, but utility
> commands cannot be prepared, and probably, there should be special support for
> any PL. I hope a cleaner implementation can help to move this patch.
>
> We can choose one variant in the next step and this variant can be finalized.
>
> Notes, comments?

Thank you!

I tried to give the patch a spin, but it doesn't apply any more,
and there are too many conflicts for me to fix manually.