Tom Lane wrote:
> The main thing that I'm not happy about is the syntax. I'm going to
> resist commandeering => for this purpose, and I don't see any way to
> use that symbol for this without forbidding it as a user-defined
> operator. I previously suggested using AS, which is already a fully
> reserved word, but that suggestion seems not to have garnered any
> support.
As previously mentioned, AS is already used by the SQL standard for a
different purpose in this context.
--
Peter Eisentraut
http://developer.postgresql.org/~petere/