Re: [HACKERS] Wishlist for next version: group by clause

From: Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us>
To: de(at)ucolick(dot)org (De Clarke)
Cc: E(dot)Mergl(at)bawue(dot)de, pgsql-hackers(at)postgreSQL(dot)org
Subject: Re: [HACKERS] Wishlist for next version: group by clause
Date: 1998-06-16 19:09:41
Message-ID: 199806161909.PAA26043@candle.pha.pa.us
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>
>
> I didn't realize PG could not do
>
> group by [function on column]
>
> Ouch!
>
> I *think* all the "real" RDBMS can do this. If Oracle and
> Sybase both support it, that makes it more or less a de facto
> standard :-) I'm sure we use this syntax in several places in
> our apps -- certainly in our time-series analysis package.
> Implication is that 6.3 is still not functional enough to
> replace an existing commercial SQL server such as Oracle or
> Sybase for production apps, without expensive manual proofing
> and rewriting of embedded SQL statements.
>
> Does anyone know whether this group by syntax is ANSI SQL92?

Added to TODO. Vadim may have a comment on this, and how hard it is to
do. I know we allow functional indexes, but am not sure how that
relates to this problem.

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