Re: Extending outfuncs support to utility statements

From: Andres Freund <andres(at)anarazel(dot)de>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com>, pgsql-hackers(at)lists(dot)postgresql(dot)org
Subject: Re: Extending outfuncs support to utility statements
Date: 2022-09-22 17:01:03
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On 2022-09-22 12:48:47 -0400, Tom Lane wrote:
> I wrote:
> > I think this is the issue Peter mentioned about needing to distinguish
> > between empty strings and NULL strings. We're going to need to rethink
> > the behavior of pg_strtok() a bit to fix that.
> After staring at the code a bit, I think we don't need to touch
> pg_strtok() per se. I propose that this can be resolved with changes
> at the next higher level. Let's make outToken print NULL as <> as
> it always has, but print an empty string as "" (two double quotes).
> If the raw input string is two double quotes, print it as \"" to
> disambiguate. This'd require a catversion bump when committed,
> but I don't think there are any showstopper problems otherwise.

Makes sense to me.

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