Re: Request for Patch Feedback: Lag & Lead Window Functions Can Ignore Nulls

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Nicholas White <n(dot)j(dot)white(at)gmail(dot)com>, Troels Nielsen <bn(dot)troels(at)gmail(dot)com>, Jeff Davis <pgsql(at)j-davis(dot)com>, Hitoshi Harada <umi(dot)tanuki(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Request for Patch Feedback: Lag & Lead Window Functions Can Ignore Nulls
Date: 2013-06-28 15:41:57
Message-ID: 20130628154157.GU3757@eldon.alvh.no-ip.org
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Robert Haas escribió:
> On Thu, Jun 27, 2013 at 8:52 PM, Nicholas White <n(dot)j(dot)white(at)gmail(dot)com> wrote:

> The documentation you've added reads kind of funny to me:
>
> + [respect nulls]|[ignore nulls]
>
> Wouldn't we normally write that as [ [ RESPECT | IGNORE ] NULLS ] ?

I think it should be
[ { RESPECT | IGNORE } NULLS ]
One of the leading keywords must be present.

--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services

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