From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Max Buvry <Max(dot)Buvry(at)enseeiht(dot)fr> |
Cc: | PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org> |
Subject: | Re: Book - SQL Aggregates |
Date: | 1999-12-07 03:27:22 |
Message-ID: | 199912070327.WAA19865@candle.pha.pa.us |
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Lists: | pgsql-hackers |
> %--
> %--> Dear sir,
> %-->
> %--> Just one remark for your book :
> %--> in your chapter "SQL Aggregates", it is interessant perhaps if you
> %--> say if COUNT(DISTINCT ...) for example is supported.
> %-->
> %--> mb
> %-->
> %--
> %--It isn't supported.
> %--
>
> Sorry, I just want to say "It is not supported" obviously. I think, it is
> important to say it, because I search for my mistake a little bit before
> finding the answer in the FAQ.
CC to hackers.
The best way to do that is to display a mess to the user when they try
COUNT(DISTINCT...). That makes it easy because they see it as soon as
they try it. No hunting around, but I am not sure how to do that in the
grammer because we don't find out about aggregates until later.
--
Bruce Momjian | http://www.op.net/~candle
maillist(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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