On 04/18/2011 04:20 PM, Tom Lane wrote:
Peter Eisentraut<pete...@gmx.net> writes:
This came from a review by Noah Misch a great while ago:
test=> SELECT b FROM foo ORDER BY 1 COLLATE "C";
ERROR: 42804: collations are not supported by type integer
According to SQL92, this should be supported. Do we want to bother? It
doesn't look hard to fix, so it's really only a question of whether this
would be useful, or its absence would be too confusing.
The ORDER BY 1 business seems to me to be legacy anyway. I'm not
inclined to put in even more hacks to make strange combinations work
there --- I think we're likely to find ourselves painted into a corner
someday as it is.
It's likely to be used by SQL generators if nothing else, and I've been
known to use it as a very convenient shorthand. It would seem to me like
quite a strange inconsistency to allow order by n with some qualifiers
but not others.
cheers
andrew
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