Re: EXTRACT Clarification

From: Kris Jurka <books(at)ejurka(dot)com>
To: "Thomas F(dot)O'Connell" <tfo(at)sitening(dot)com>
Cc: Stephan Szabo <sszabo(at)megazone(dot)bigpanda(dot)com>, pgsql-docs(at)postgresql(dot)org
Subject: Re: EXTRACT Clarification
Date: 2004-09-29 13:25:59
Message-ID: Pine.BSO.4.56.0409290825020.14292@leary.csoft.net
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On Wed, 29 Sep 2004, Thomas F.O'Connell wrote:

> Note: EXTRACT is not a true function. SQL defines it as an expression
> that happens to look similar to a function call.
>
> Also, are there other expressions that fall into this category? I don't
> know the spec well enough to know.

At least COALESCE and NULLIF are not functions.

Kris Jurka

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