From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Eric Jain <jain(at)gmx(dot)net> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Alias in WHERE clause |
Date: | 2000-05-20 11:37:59 |
Message-ID: | 200005201137.HAA15792@candle.pha.pa.us |
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Thread: | |
Lists: | pgsql-general |
[Charset iso-8859-1 unsupported, filtering to ASCII...]
> I would like to be able to say:
>
> SELECT url,score_a(text, CAST('term' AS TEXT)) AS score FROM articles
> WHERE score > 0
> ORDER BY score DESC;
>
> This returns: ERROR: Attribute 'score' not found.
We just don't support aliases in WHERE, as you suggest. I see your
problem if score_a is complicated. The issue is that the target list is
not evaluated until _after_ the WHERE clause.
--
Bruce Momjian | http://www.op.net/~candle
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
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