Re: [PATCH] SQL function to report log message

From: dinesh kumar <dineshkumar02(at)gmail(dot)com>
To: Kevin Grittner <kgrittn(at)ymail(dot)com>
Cc: Craig Ringer <craig(at)2ndquadrant(dot)com>, Peter Eisentraut <peter_e(at)gmx(dot)net>, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, David Fetter <david(at)fetter(dot)org>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [PATCH] SQL function to report log message
Date: 2015-11-16 20:17:27
Message-ID: CALnrH7pOLR2Hpt0aGYiffZEFZmUprB=aDqDQ=jbewf_4HdNL0A@mail.gmail.com
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On Mon, Nov 16, 2015 at 3:58 PM, Kevin Grittner <kgrittn(at)ymail(dot)com> wrote:

> On Sunday, November 15, 2015 8:51 PM, Craig Ringer <craig(at)2ndquadrant(dot)com>
> wrote:
>
> > I'd prefer to omit fields if explicitly assigned to NULL. You can
> > always use coalesce if you want the string 'NULL'; I agree with
> > others here that the vast majority of users will want the field
> > just omitted.
>
> +1
>
> Unfortunately those writing the SQL standard chose to have a single
> flag (NULL) to indicate either "unknown" or "not applicable". That
> causes problems where it's not clear which way the value should be
> interpreted, but in this case it seems pretty clear that someone
> passing a NULL parameter for hint to a function like this doesn't
> mean "there is likely to be a valid value for hint, but I don't
> know what it is" -- they mean there is no available hint, so please
> don't show one. Any other behavior seems rather silly.
>
> Thanks Kevin/Craig for your comments.

> --
> Kevin Grittner
> EDB: http://www.enterprisedb.com
> The Enterprise PostgreSQL Company
>

--

Regards,
Dinesh
manojadinesh.blogspot.com

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