| From: | Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Jan Wieck <jwieck(at)debis(dot)com> |
| Cc: | PostgreSQL HACKERS <pgsql-hackers(at)postgreSQL(dot)org> |
| Subject: | Re: [HACKERS] WHERE vs HAVING |
| Date: | 1999-07-07 03:40:33 |
| Message-ID: | 199907070340.XAA02805@candle.pha.pa.us |
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| Lists: | pgsql-hackers |
> Planner guru's please!
>
> I wonder what makes the difference between WHERE and HAVING
> that causes HAVING to accept aggregates while WHERE doesn't.
> It would be extremely nice if it's possible to teach WHERE
> how to handle aggregates properly. Having to push them into
> subselects during rewrite if a views aggregate column appears
> in the WHERE clause is a total mess.
SQL requires the restriction.
--
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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