From: Phillip Smith <phillip.smith@weatherbeeta.com.au>
To: 'Tom Lane' <tgl@sss.pgh.pa.us>
Cc: pgsql-sql@postgresql.org
Subject: Re: DISTINCT ON not working...?
Date: Tue, 20 Feb 2007 15:36:32 +1100
Message-ID: <00e601c754a8$b2428010$9b0014ac@wbaus090> (raw)
In-Reply-To: <19666.1171945956@sss.pgh.pa.us>
Removing the CASE statement all together:
SELECT DISTINCT ON (ean)
ean,
count(*)
FROM TMPTABLE
WHERE code NOT IN (SELECT code FROM stock_deleted)
AND ean IS NOT NULL
GROUP BY ean
Still gives me:
3246576919422 2
-----Original Message-----
From: Tom Lane [mailto:tgl@sss.pgh.pa.us]
Sent: Tuesday, 20 February 2007 15:33
To: Phillip Smith
Cc: pgsql-sql@postgresql.org
Subject: Re: [SQL] DISTINCT ON not working...?
Perhaps you've confused yourself by using "ean" as both an input and an
output column name? I think that the "ean" in the DISTINCT ON clause
will effectively refer to that CASE-expression, whereas the one in the
WHERE clause is just referring to the underlying column (and thus making
the IS NULL test in the CASE rather pointless).
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: phillip.smith@weatherbeeta.com.au, tgl@sss.pgh.pa.us
Subject: Re: DISTINCT ON not working...?
In-Reply-To: <00e601c754a8$b2428010$9b0014ac@wbaus090>
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