On Sep 11, 2007, at 13:42 , David Fetter wrote:
> I believe that foo!=bar without white space should simply error out
> because there is no reasonable, unambiguous way to parse it. Here's
> what we get right now:
What's ambigious about it? An operator cannot include a space, so !=
(no space) is *always* interpreted as one operator: not equals (<>).
space (! and = are separate operators), so ! is factorial.
> test=# SELECT (2! =0);
> ?column?
> ----------
> f
> (1 row)
> test=# SELECT (2 ! =0);
> ?column?
> ----------
> f
> (1 row)
> test=# SELECT (2 ! = 0);
> ?column?
> ----------
> f
> (1 row)
>
no space, so != is one operator,
> test=# SELECT (2!=0);
> ?column?
> ----------
> t
> (1 row)
> test=# SELECT (2 != 0);
> ?column?
> ----------
> t
> (1 row)
>
> test=# SELECT (2 !=0);
> ?column?
> ----------
> t
> (1 row)
Michael Glaesemann
grzm seespotcode net
