Tom Lane wrote:
"Simon Riggs" <[EMAIL PROTECTED]> writes:
On Thu, 2007-05-10 at 10:11 -0400, Tom Lane wrote:
As for GENERATED ALWAYS AS (expr), now that we understand that it's not
supposed to define a virtual column, what's the point?


We do need virtual columns, whether the spec requires them or not.

Agreed, they seem more useful than what the spec's got in mind.  You can
fake a virtual column using a view, but it's a whole lot more painful
than faking a GENERATED column using a trigger (at least if you wish the
view to be updatable).

If they could play a part in foreign keys that would be useful too.

--
  Richard Huxton
  Archonet Ltd

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