On Thu, Nov 01, 2007 at 02:22:58PM -0400, Tom Lane wrote: > > SELECT random() FROM generate_series(1, 10) ORDER BY random(); > > SELECT random() AS foo FROM generate_series(1, 10) ORDER BY foo; > > (BTW, this is not the planner's fault; the collapsing of the two > targetlist entries into one happens in the parser.) Something twigged telling me that in fact the latter expression is not in standard SQL but a (very common) extension. A <sort key> is clearly indicated to be a <value expression> with no indication anywhere that column aliases are allowed here (though that may be in the common rules somewhere). Then again, I may be remembering all wrong... Have a nice day, -- Martijn van Oosterhout <kleptog@xxxxxxxxx> http://svana.org/kleptog/ > Those who make peaceful revolution impossible will make violent revolution inevitable. > -- John F Kennedy
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