From: Richard Klingler <richard@klingler.net>
To: pgsql-sql@postgresql.org
Subject: conditional FROM
Date: Sat, 10 Dec 2011 17:03:32 +0100
Message-ID: <20111210170332479879.3df30525@klingler.net> (raw)
Good day...
I'm trying to build a query for PGSQL 9.1 where a table has two
references with only one being used depending of the type of entry..
For example, the table has following simplified structure:
portid primary key
port2node index to table node
port2card index to table card
So how can I do a conditional FROM clause in the query depending on the
column port2node and port2card?
If port2card is Null or 0 I don't want it in the FROM clause as the
query will return unneccessary duplicate
row...the same goes for port2node being Null or 0...
thanx in advance
richard
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To: pgsql-sql@postgresql.org
Cc: richard@klingler.net
Subject: Re: conditional FROM
In-Reply-To: <20111210170332479879.3df30525@klingler.net>
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