David Fetter <[EMAIL PROTECTED]> writes:
> On Sat, Jul 29, 2006 at 09:44:10PM -0400, Tom Lane wrote:
>> The correct solution is for client-side libraries to provide the
>> feature.

> Not if the app is written in SQL, as the bootstrap, regression test,
> etc. code for modules frequently is.

SQL doesn't really have any conditional ability strong enough to deal
with existence or non-existence of features.  What are you hoping to
do, a CASE expression?  Both arms of the CASE still have to parse,
so I remain unconvinced that there are real world uses.

                        regards, tom lane

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