Hi,
I see that you pushed this patch. I'm unfortunately unhappy with the
approach taken. As previously said, handling a lot of this from exec_*
is a mistake in my opinion. Pretty much the same problem exists for
parametrized query execution from other contexts, e.g. for queries
executed inside plpgsql. By putting the responsibility to manage error
contexts etc from with exec_*, we'd need to add a copy of that to pretty
much every place executing queries. This should all be in the portal
code, with an optimization for computing the parameter values from
strings inside postgres.c, when the input is text.
Greetings,
Andres Freund