Michael Paquier <michael@paquier.xyz> writes:
> On Mon, Jan 28, 2019 at 05:05:32PM -0500, Tom Lane wrote:
>> Yeah, I thought about that too, but it doesn't seem like an improvement.
>> If the query is very long (which isn't unlikely) I think people would
>> prefer to see the option(s) up front.
> Having these options at the front of the WITH clause looks more
> natural to me.
Well, we've managed to get agreement on the semantics of this thing,
let's not get hung up on the syntax details.
I propose that we implement and document this as
WITH ctename AS [ MATERIALIZE { ON | OFF } ] ( query )
which is maybe a bit clunky but not awful, and it would leave room
to generalize it to "AS [ optionname optionvalue [ , ... ] ]" if we
ever need to. Looking at the precedent of e.g. EXPLAIN, we could
probably allow just "MATERIALIZE" as well, with the boolean value
defaulting to true.
regards, tom lane