Re: Trailing comma support in SELECT statements

On Sun, Sep 28, 2014 at 01:42:46PM +0200, Bogdan Pilch wrote:
> Hi,
> I have created a small patch to postgres source (in particular the
> psql part of it) that accepts trailing comma at the end of list in
> SELECT statement.
>
> The idea is to be able to say both (with the same result):
> SELECT a, b, c from t;
> SELECT a, b, c, from t;
>
> Attached you can find a patch containing regression test (incorporated
> into the serial_schedule).
> My patch is relative to origin/REL9_4_STABLE branch as that is the one
> I started from.
>
> My plea is to have this change merged into the main stream so that it
> becomes available in upcoming releases.
>
> This modification does not require any interaction with user.
> It does not create any backward compatibility issues.

Interesting --- I know some languages allow trailing delimiters, like
Perl and Javascript. Could this mask query errors? Does any other
database accept this? Seems this would need to be done in many other
places, like UPDATE, but let's first decide if we want this.

FYI, it is usually better to discuss a feature before showing a patch.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ Everyone has their own god. +